WO2019220660A1 - Rotary electric machine and method for manufacturing same - Google Patents

Rotary electric machine and method for manufacturing same Download PDF

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Publication number
WO2019220660A1
WO2019220660A1 PCT/JP2018/038835 JP2018038835W WO2019220660A1 WO 2019220660 A1 WO2019220660 A1 WO 2019220660A1 JP 2018038835 W JP2018038835 W JP 2018038835W WO 2019220660 A1 WO2019220660 A1 WO 2019220660A1
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Prior art keywords
wedge
divided
conductive metal
metal plate
wedges
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PCT/JP2018/038835
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French (fr)
Japanese (ja)
Inventor
紀彦 葉名
米谷　晴之
秋吉　雅夫
洋平 大本
亮輔 安部
善秀 菊一
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2019511671A priority Critical patent/JP6522272B1/en
Publication of WO2019220660A1 publication Critical patent/WO2019220660A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices

Definitions

  • the present invention relates to a rotating electrical machine having a cylindrical rotor and a method for manufacturing the same, and, for example, relates to a rotor structure of a rotating electrical machine applied to a turbine generator.
  • the field winding is installed in a groove-like slot provided in the rotor core.
  • the slot includes a damper bar through which an eddy current induced by the magnetic flux from the armature winding flows, an insulator that insulates the damper bar from the field winding, and the slot contents
  • a wedge for preventing scattering is installed (for example, see Patent Document 1).
  • an insulator, a damper bar, and a wedge are installed on the outer peripheral side of the rotor core with respect to the field winding.
  • the wedge for preventing scattering has a function of conducting between the damper bars at the axial center of the rotor core and conducting between the damper bar and the holding ring at the axial end of the rotor core. Therefore, the wedge is made of a metal having high conductivity, for example, a BeCu alloy. Note that high conductivity means that it is easy to conduct electricity.
  • the wedge Since the wedge is made of a highly conductive metal, it was necessary to thicken the wedge in the radial direction in order to withstand the centrifugal force acting on the field windings, insulators, and damper bars. This increases the distance between the field winding and the armature winding, and a part of the magnetic flux generated by the field winding does not interlink with the armature winding, resulting in loss in the rotor core. Was getting bigger.
  • the wedge when the wedge is made of a high-strength non-magnetic material, such as stainless steel, the wedge can withstand the centrifugal force acting on the field winding, the insulator, and the damper bar without increasing the thickness in the radial direction. .
  • This shortens the distance between the field winding and the armature winding increases the amount of magnetic flux generated by the field winding to be linked to the armature winding, and causes a loss in the rotor core. Can be reduced.
  • the field current can be reduced and the efficiency is improved.
  • high-strength nonmagnetic materials such as stainless steel have low conductivity. Therefore, the eddy current from the damper bar hardly flows through the wedge at the axial center portion and both axial end portions of the rotor core, and there is a problem that heat generation at the wedge increases and eddy current loss increases.
  • the present invention has been made to solve such a problem, and an object of the present invention is to obtain a rotating electrical machine capable of improving efficiency by suppressing heat generation in a wedge due to eddy current and a manufacturing method thereof. .
  • a rotating electric machine includes an armature provided with armature windings, and a rotor arranged on the inner diameter side of the armature.
  • the rotor includes a rotor core having a plurality of slots extending in the radial direction and open in the radial direction and extending in the axial direction, field windings housed in the slots, and the slots.
  • a plurality of split wedges that are housed in an axial arrangement on the opening side of the rotor, and that hold the field winding fixedly in the slot, and retaining rings attached to both axial ends of the rotor core. Have.
  • the plurality of divided wedges include a composite wedge, and the composite wedge includes a main body portion that holds the field winding, and an electric current body that is held by the main body portion and through which an eddy current flows.
  • the current-carrying body is made of a highly conductive metal from the main body, heat generation in the composite wedge due to eddy current is suppressed. Since the main body is made of a nonmagnetic material having a strength higher than that of the current-carrying member, the thickness can be reduced to prevent the slot contents from scattering. Therefore, the position of the field winding in the slot approaches the armature winding, and the field current can be reduced, so that the efficiency can be improved.
  • FIG. 1 is a longitudinal sectional view showing a rotary electric machine according to Embodiment 1 of the present invention
  • FIG. 2 is a perspective view showing a rotor in the rotary electric machine according to Embodiment 1 of the present invention
  • a longitudinal cross-sectional view is a cross-sectional view showing a cross section including the axis of the rotation shaft.
  • the rotating electrical machine 100 includes a frame 1, a rotating shaft 7 rotatably supported by the frame 1, and a rotating shaft 7 fixed to the rotating shaft 7 so as to be rotatable inside the frame 1, an electromagnet,
  • the rotor 6 having the rotor core 8 and the armature core 4 which is held by the frame 1 and surrounds the rotor core 8 and is provided coaxially, and the armature core 4 is held by the rotor core.
  • an armature 3 having an armature winding 5 that generates an output current by interlinking the magnetic flux of 8.
  • the rotating shaft 7 is connected to a prime mover (not shown). Thereby, the rotational force of the prime mover is applied to the rotor core 8 via the rotary shaft 7.
  • a gas cooler 2 for cooling air or hydrogen refrigerant for suppressing heat generation in a field winding (not shown) mounted on the rotor core 8, the armature winding 5, etc. is provided inside the frame 1. Is provided.
  • the slots 10 are respectively opened from one end to the other end in the axial direction of the rotor core 8 with the groove direction as an axial direction, and open to the outer peripheral surface of the rotor core 8.
  • a plurality are provided in the circumferential direction.
  • the field winding is installed in the slot 10.
  • a wedge is installed in the slot 10 to prevent the slot contents such as field windings from popping out due to centrifugal force.
  • a structure (not shown) for coupling field windings installed in the slot 10 is installed at both axial ends of the rotor core 8.
  • Metal retaining rings 9 for suppressing deformation due to centrifugal force of the structure for coupling the field windings are provided at both axial ends of the rotor core 8.
  • the rotating electrical machine 100 configured in this way, the rotational force of the prime mover is applied to the rotor 6 through the rotating shaft 7. Thereby, a rotating magnetic field is applied to the armature winding 5, and an electromotive force is generated in the armature winding 5.
  • the rotating electrical machine 100 operates as a generator.
  • FIG. 3 is a cross-sectional view of the main part showing the periphery of the rotor slot in the rotating electrical machine of the comparative example
  • FIG. The transverse cross-sectional view is a cross-sectional view showing a cross section orthogonal to the axis of the rotation axis.
  • the field winding 11, the insulator 12, and the damper bar 13 are installed in each slot 10 in this order from the inner diameter side.
  • the U channel 14 is installed on the inner diameter side of the field winding 11 of each slot 10 with the opening directed radially outward, and an axial ventilation path 15 is configured.
  • a wedge is installed on the outer diameter side of the damper bar 13 of each slot 10 to prevent the field winding 11, the insulator 12 and the damper bar 13 from jumping out.
  • the wedges are a first divided wedge 16 installed at the center of the slot 10 in the axial direction, a second divided wedge 17 installed at both ends of the slot 10 in the axial direction, and a first divided wedge of the slot 10.
  • the first divided wedge 16, the second divided wedge 17, and the plurality of third divided wedges 18 are housed in a line in the axial direction on the opening side of each slot 10.
  • the radial ventilation path 20 penetrates the first divided wedge 16, the second divided wedge 17, the third divided wedge 18, the damper bar 13, the insulator 12, and the field winding 11 in the radial direction at a plurality of positions in the axial direction.
  • the axial direction air passage 15 and the outside communicate with each other.
  • the first split wedge 16 is in contact with the damper bar 13 that is separated and installed in the axial direction at the central portion in the axial direction, and the damper bars 13 are electrically short-circuited.
  • the second split wedge 17 is in contact with the damper bar 13 and the holding ring 9 and electrically shorts the damper bar 13 and the holding ring 9.
  • the eddy current flowing in the holding ring 9 flows from the holding ring 9 to the damper bar 13 through the second split wedge 17 installed in the other slot 10.
  • an eddy current path is formed in the rotor via the retaining ring 9, and heat generation due to the eddy current of the rotor including the first divided wedge 16 and the second divided wedge 17 is suppressed.
  • the first divided wedge 16 and the second divided wedge 17 are made of a highly conductive metal, for example, a BeCu alloy.
  • the conductivity required for the first divided wedge 16 and the second divided wedge 17 is 20% IACS according to the conductivity reference IACS (International Annealed Copper Standard).
  • the third divided wedge 18 since the third divided wedge 18 does not need conductivity, it is made of a high-strength nonmagnetic material such as stainless steel.
  • the material strength required for the third divided wedge 18 is defined by 0.2% proof stress and is 196 MPa or more. As a result, the third divided wedge 18 is suppressed from generating heat due to the magnetic flux from the armature winding 5.
  • FIG. 5 is a longitudinal sectional view of a main part showing the periphery of the slot of the rotor in the rotary electric machine according to Embodiment 1 of the present invention
  • FIG. FIG. 7 is a longitudinal sectional view showing the divided wedge
  • FIG. 7 is an end view of the first divided wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention as viewed from the axial direction
  • FIG. 8 is an embodiment of the present invention.
  • FIG. 9 is a longitudinal sectional view showing a second divided wedge of the rotor in the rotating electrical machine according to FIG. 1, and FIG. FIG.
  • FIG. 10 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention as viewed from one end in the axial direction
  • FIG. 11 is Embodiment 1 of the present invention.
  • FIG. 12 is an exploded perspective view showing a first split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention
  • FIG. 13 is a rotor in the rotary electric machine according to Embodiment 1 of the present invention. It is a disassembled perspective view which shows the 2nd division
  • the rotor 6 includes a first divided wedge 30 that is installed in the center in the axial direction of the slot 10 instead of the first divided wedge 16, and the second divided wedge.
  • 35 is configured in the same manner as the rotor of the comparative example, except that 35 is installed at both axial ends of the slot 10 instead of the second divided wedge 17.
  • the wedge is divided into a first divided wedge 30, a second divided wedge 35, and a third divided wedge 18.
  • the first divided wedge 30 is a composite wedge including a first divided upper wedge 31, a first divided lower wedge 32, and a conductive metal plate 33.
  • the first divided lower wedge 32 is formed in a substantially rectangular parallelepiped shape in which a concave portion 32a having the groove direction as an axial direction is formed at the center of the upper surface.
  • the conductive metal plate 33 is formed in a rectangular flat plate shape, is disposed in the recess 32a, and folds the protruding portions from the first divided lower wedge 32 to both sides in the axial direction so that both end surfaces in the axial direction of the first divided lower wedge 32 are formed. Extending along the lower surface of the first divided lower wedge 32.
  • the mounting regions of the conductive metal plates 33 on both end surfaces in the axial direction of the first divided lower wedge 32 are formed in the recesses, and both end surfaces in the axial direction of the first divided lower wedge 32 and the conductive metal plates are formed. 33 is flush.
  • the mounting area of the conductive metal plate 33 on the lower surface of the first divided lower wedge 32 is formed in the recess, and the lower surface of the first divided lower wedge 32 and the conductive metal plate 33 are flush with each other.
  • segmentation upper wedge 31 has the convex part 31a which can be fitted with the recessed part 32a in the lower surface center part.
  • the convex portion 31 a is fitted into the concave portion 32 a, and the conductive metal plate 33 is sandwiched and held between the first divided upper wedge 31 and the first divided lower wedge 32.
  • the first divided upper wedge 31 and the first divided lower wedge 32 are integrated.
  • the first divided upper wedge 31 and the first divided lower wedge 32 have the same axial end surfaces.
  • the integrated first divided upper wedge 31 and the first divided lower wedge 32 serve as a main body portion
  • the conductive metal plate 33 serves as a current-carrying body.
  • the radial ventilation path 20 is formed in the first divided upper wedge 31, the first divided lower wedge 32, and the conductive metal plate 33.
  • the first divided upper wedge 31 and the first divided lower wedge 32 are made of a high-strength nonmagnetic material such as stainless steel.
  • the conductive metal plate 33 is made of a material having conductivity equal to or higher than that of the first divided wedge 16 and the second divided wedge 17 in the comparative example, for example, copper or a copper alloy.
  • the first divided upper wedge 31 and the first divided lower wedge 32 are made of a nonmagnetic material having a higher strength than the conductive metal plate 33.
  • the conductive metal plate 33 is made of a metal having higher conductivity than the first divided upper wedge 31 and the first divided lower wedge 32.
  • the second divided wedge 35 includes a second divided upper wedge 36, a second divided lower wedge 37, a first conductive metal plate 38 a, and a second conductive property. And a metal wedge 38b.
  • the second divided lower wedge 37 is formed in a substantially rectangular parallelepiped having an axial length longer than that of the second divided upper wedge 36, and a concave portion 37a having the groove direction in the axial direction is formed at the center of the upper surface.
  • the first conductive metal plate 38a is formed in a rectangular flat plate shape, and is disposed in the recess 37a.
  • the first conductive metal plate 38a is bent in the axial direction of the second divided lower wedge 37 by folding back the protruding portions from the second divided lower wedge 37 to both sides in the axial direction. It extends along both end surfaces and is arranged along the lower surface of the second divided lower wedge 37. At this time, the mounting regions of the first conductive metal plates 38a on both end faces in the axial direction of the second divided lower wedge 37 are formed in the recesses, and both the end faces in the axial direction of the second divided lower wedge 37 and the first end faces The conductive metal plate 38a is flush.
  • the mounting area of the first conductive metal plate 38a on the lower surface of the second divided lower wedge 37 is formed in the recess, and the lower surface of the second divided lower wedge 37 and the first conductive metal plate 38a are flush with each other. It has become.
  • the second divided upper wedge 36 has a convex portion 36a that can be fitted to the concave portion 37a at the center of the lower surface.
  • the second conductive metal plate 38b is formed in a rectangular flat plate shape and is disposed on the convex portion 36a.
  • the second conductive upper metal plate 38b is folded back from the second divided upper wedge 36 toward the one end side in the axial direction, so that the axis of the second divided upper wedge 36 is obtained. It arrange
  • the mounting region of the second conductive metal plate 38b on the one end surface in the axial direction of the second divided upper wedge 36 is formed in the concave portion, and the one end surface in the axial direction of the second divided upper wedge 36 and the second The conductive metal plate 38b is flush.
  • the second divided wedge 35 has the convex portion 36a fitted into the concave portion 37a, and the first conductive metal plate 38a and the second conductive metal plate 38b are divided into the second divided upper wedge 36 and the second divided lower wedge 37.
  • the second divided upper wedge 36 and the second divided lower wedge 37 are integrated with each other while being held between the two.
  • the second divided lower wedge 37 protrudes from the second divided upper wedge 36 to one axial end side, and the other axial end surfaces of the second divided upper wedge 36 and the second divided lower wedge 37 are flush with each other.
  • the integrated second divided upper wedge 36 and second divided lower wedge 37 serve as a main body portion, and the first conductive metal plate 38a and the second conductive metal plate 38b serve as a current-carrying body.
  • the radial ventilation path 20 is formed in the second divided upper wedge 36, the second divided lower wedge 37, the first conductive metal plate 38a, and the second conductive metal plate 38b.
  • the second divided upper wedge 36 and the second divided lower wedge 37 are made of a high-strength nonmagnetic material such as stainless steel.
  • the first conductive metal plate 38 a and the second conductive metal plate 38 b are made of the same material as the conductive metal plate 33.
  • the second divided upper wedge 36 and the second divided lower wedge 37 are made of a nonmagnetic material having higher strength than the first conductive metal plate 38a and the second conductive metal plate 38b.
  • the first conductive metal plate 38 a and the second conductive metal plate 38 b are made of a metal having higher conductivity than the second divided upper wedge 36 and the second divided lower wedge 37.
  • the two metal plates of the first conductive metal plate 38a and the second conductive metal plate 38b are used, one metal plate is used, and the second divided wedge 35 extends to one end side in the axial direction.
  • the protruding portion may be divided and folded up and down.
  • the second split wedge 35 installed at one end in the axial direction of the slot 10 has been described.
  • the second split wedge 35 has a second split lower wedge 37. It is installed so as to protrude from the second divided upper wedge 36 to the other axial end side.
  • the portion where the first divided wedge 30 is divided into the first divided upper wedge 31 and the first divided lower wedge 32 is a portion that becomes a compression load when the rotor 6 receives centrifugal force during rotation.
  • the first divided upper wedge 31 and the first divided lower wedge 32 are integrated using any one of shrink fitting, cold fitting, adhesion, welding, brazing, and stir welding.
  • the second divided wedge 35 is the same as the first divided wedge 30.
  • first divided wedge 30 and the second divided wedge 35 may be integrated by using any one of adhesion, brazing welding, brazing, and stir welding together with either shrink fitting or cold fitting.
  • adhesion, brazing welding, brazing, and stir welding may be maintained.
  • the damper bar 13 in which the protruding portion of the conductive metal plate 33 from the main body portion of the first split wedge 30 is separated in the axial direction at the central portion in the axial direction.
  • the damper bars 13 are electrically short-circuited.
  • the protruding portions of the first conductive metal plate 38a and the second conductive metal plate 38b from the main body of the second divided wedge 35 are in contact with the damper bar 13 and the holding ring 9, and the damper bar 13 and the holding ring 9 Are electrically short-circuited.
  • the first conductive metal plate 38a Since the upper surface of the projecting portion of the second divided lower wedge 37 from the second divided upper wedge 36 to the one end side in the axial direction is flush with the first conductive metal plate 38a, the first conductive metal plate 38a The inner peripheral surface of the holding ring 9 comes into surface contact, and electrical connection between the two is ensured reliably. Since one end surface in the axial direction of the second divided upper wedge 36 and the second conductive metal plate 38b are flush with each other, the second conductive metal plate 38b and the other axial end surface of the holding ring 9 are in surface contact. The electrical connection between the two is ensured. Further, the contact area between the first conductive metal plate 38a and the holding ring 9 of the second conductive metal plate 38b increases, and the contact resistance is reduced.
  • the first divided wedge 16 and the second divided wedge 17 are made of a high CuCu alloy or the like. It was made of a conductive material. However, it is difficult to achieve both high conductivity and high strength, and the thickness of the first divided wedge 16 and the second divided wedge 17 is increased to ensure the function of preventing the slot contents from scattering. As a result, the distance between the field winding 11 and the armature winding 5 increases, and the amount of magnetic flux generated from the field winding 11 intersecting the armature winding 5 decreases.
  • the first divided wedge 30 is a composite wedge including a first divided upper wedge 31, a first divided lower wedge 32, and a conductive metal plate 33.
  • the conductive metal plate 33 is made of a metal having higher conductivity than the first divided upper wedge 31 and the first divided lower wedge 32. Since the conductive metal plate 33 has a conductive function, the first divided upper wedge 31 and the first divided lower wedge 32 that hold the conductive metal plate 33 do not require high conductivity. The same applies to the second divided wedge 35. Therefore, the characteristics required for the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36, and the second divided lower wedge 37 can be specialized in strength.
  • the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 are replaced with the conductive metal plate 33, the first conductive metal plate 38a and the second conductive. It can be made of a material stronger than the metal plate 38b. Therefore, the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 are used as materials for the first divided wedge 16 and the second divided wedge 17.
  • a nonmagnetic material having a higher strength than the BeCu alloy, such as stainless steel, can be used. As a result, the thickness of the first divided wedge 30 and the second divided wedge 35 can be reduced.
  • the conductive metal plate 33, the first conductive metal plate 38a, and the second conductive metal plate 38b are divided into a first divided upper wedge 31, a first divided lower wedge 32, a second divided upper wedge 36, and a second divided lower plate. Since it is made of a conductive material higher than the wedge 37, such as copper or copper alloy, heat generation in the first divided wedge 30 and the second divided wedge 35 is suppressed, and eddy current loss can be reduced.
  • the first divided wedge 30 is housed in the central portion of the slot 10 in the axial direction, and the second divided wedges 35 are housed in both axial end portions of the slot 10. Therefore, an eddy current that is induced by the magnetic flux from the armature winding 5 and flows through the damper bar 13 installed on the other side in the axial direction is indicated by an arrow 19 in FIG. It flows through the conductive metal plate 33 to the damper bar 13 installed on one side in the axial direction. Further, the eddy current flowing through the damper bar 13 flows to the holding ring 9 through the first conductive metal plate 38a and the second conductive metal plate 38b of the second split wedge 35. The eddy current flowing in the holding ring 9 passes through the first conductive metal plate 38a and the second conductive metal plate 38b of the second split wedge 35 installed in the other slot 10 from the holding ring 9, and the damper bar. 13 flows.
  • the conduction between the damper bars 13 in the axially central portion is maintained by the conductive metal plate 33 of the first divided wedge 30.
  • the second split wedge 35 is housed at both axial ends, the conduction between the damper bar 13 and the retaining ring 9 at both axial ends is the first conductive metal plate 38a of the second split wedge 35 and the second conductive. Maintained by the conductive metal plate 38b.
  • the first divided upper wedge 31 and the first divided lower wedge 32 are made of a nonmagnetic material having higher strength than the conductive metal plate 33.
  • the second divided upper wedge 36 and the second divided lower wedge 37 are made of a nonmagnetic material having higher strength than the first conductive metal plate 38a and the second conductive metal plate 38b. Therefore, even if the thickness of the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36, and the second divided lower wedge 37 is reduced, the scattering of the slot contents can be prevented. As a result, the position of the field winding 11 in the slot 10 approaches the armature winding 5 and the field current can be reduced, thereby improving the efficiency.
  • the first divided wedge 30 is a state in which the conductive metal plate 33 is sandwiched and held between the first divided upper wedge 31 and the first divided lower wedge 32, and the first divided upper wedge 31 and the first divided lower wedge 30.
  • the wedge 32 is integrated. Therefore, when the rotor 6 rotates, the centrifugal force acts to press the conductive metal plate 33 against the first divided upper wedge 31 via the first divided lower wedge 32. As a result, the occurrence of a situation where the conductive metal plate 33 is detached from the first divided wedge 30 is suppressed. The same applies to the second divided wedge 35.
  • the axial ventilation path 15 is provided only at the bottom of the slot 10, but the radial position of the axial ventilation path 21 is changed as shown in FIGS.
  • a plurality of field windings 11 may be formed.
  • the radial ventilation path 20 is formed in the first split wedge 30, the damper bar 13, the insulator 12, and the field winding 11 at the axial center of the rotor core 8.
  • the plurality of axial ventilation passages 21 are communicated with the outside.
  • the radial ventilation path 20 is not necessarily formed in the second divided wedge 35 and the third divided wedge 18.
  • the rotor according to the first embodiment can be applied to both the radial direction ventilation type and the axial direction ventilation type rotating electrical machines.
  • the rotor according to the other embodiments can be applied to both the radial-direction ventilation type and the axial-direction ventilation type rotating electrical machines.
  • the conductive metal plate 33 is formed on the contact surface of the conductive metal plate 33, the first conductive metal plate 38 a, and the second conductive metal plate 38 b with the damper bar 13 or the holding ring 9.
  • the contact resistance may be reduced by plating with a conductive metal that is higher than the first conductive metal plate 38a and the second conductive metal plate 38b, such as gold or silver.
  • the conductive metal plate may be subjected to highly conductive metal plating such as gold and silver on the electrical contact surface with other members such as a damper bar.
  • each of the first divided wedge 30 and the second divided wedge 35 is either one of shrink fitting, cold fitting, adhesion, welding, brazing, stirring joining, or bonding. , Welding, brazing, and stir welding are used in combination.
  • the first split wedge and the second split wedge are each similarly shrink-fitted, cold-fitted, bonded, welded, brazed, stir welded, or bonded, respectively, Any one of welding, brazing and stir welding is used in combination.
  • the first divided wedge 30 and the second divided wedge 35 are divided into upper and lower portions that are compressed loads when receiving centrifugal force during rotation of the rotor. Also in this embodiment, it is desirable that the first divided wedge and the second divided wedge are divided into portions where the compression load is applied when the centrifugal force is applied during rotation of the rotor.
  • FIG. FIG. 16 is a longitudinal sectional view of a main part showing the periphery of the slot of the rotor in the rotary electric machine according to Embodiment 2 of the present invention
  • FIG. 17 is a first view of the rotor in the rotary electric machine according to Embodiment 2 of the present invention
  • FIG. 18 is a longitudinal sectional view showing the divided wedge
  • FIG. 18 is an end view of the first divided wedge of the rotor in the rotary electric machine according to Embodiment 2 of the present invention viewed from the axial direction
  • FIG. 19 is an embodiment of the present invention.
  • FIG. 20 is a longitudinal sectional view showing a second divided wedge of the rotor in the rotating electric machine according to FIG. 2, and FIG.
  • FIG. 20 is a view of the second divided wedge of the rotor in the rotating electric machine according to Embodiment 2 of the present invention when viewed from the other axial end side.
  • FIG. 21 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 2 of the present invention as viewed from one end side in the axial direction.
  • the first divided wedge 40 is installed in the axial center of the slot 10 instead of the first divided wedge 30, and the second divided wedge 45 is the second divided wedge 35.
  • the configuration is the same as that of the first embodiment except that it is installed at both ends in the axial direction of the slot 10 instead.
  • the wedge is divided into a first divided wedge 40, a second divided wedge 45, and a third divided wedge 18.
  • the first divided wedge 40 is a composite wedge including a first divided upper wedge 41, a first divided lower wedge 42, and a conductive metal plate 43.
  • the first divided lower wedge 42 is formed in a substantially rectangular parallelepiped shape in which a protruding portion 42a extending in the axial direction is formed at the center of the upper surface.
  • the conductive metal plate 43 is formed in a rectangular flat plate shape, arranged on the convex portion 42a, folded back from the first divided lower wedge 42 to both axial sides, and both ends of the first divided lower wedge 42 in the axial direction. It extends along the surface and is arranged along the lower surface of the first divided lower wedge 42.
  • the mounting regions of the conductive metal plates 43 on both end surfaces in the axial direction of the first divided lower wedge 42 are formed in the recesses, and both end surfaces in the axial direction of the first divided lower wedge 42 and the conductive metal plates are formed. 43 is flush.
  • the mounting area of the conductive metal plate 43 on the lower surface of the first divided lower wedge 42 is formed in the recess, and the lower surface of the first divided lower wedge 42 and the conductive metal plate 43 are flush with each other. .
  • segmentation upper wedge 41 has the recessed part 41a which can be fitted with the convex part 42a in the lower surface center part.
  • the first divided wedge 40 is configured by fitting the concave portion 41a to the convex portion 42a and integrating the first divided upper wedge 41 and the first divided lower wedge 42 together. At this time, the first divided upper wedge 41 and the first divided lower wedge 42 have both axial end surfaces flush with each other.
  • the integrated first divided upper wedge 41 and the first divided lower wedge 42 serve as a main body portion
  • the conductive metal plate 43 serves as an energizing body.
  • the method of integrating the first divided upper wedge 41 and the first divided lower wedge 42 is the same as in the first embodiment.
  • the radial ventilation path 20 is formed in the first divided upper wedge 41, the first divided lower wedge 42 and the conductive metal plate 43.
  • the first divided upper wedge 41 and the first divided lower wedge 42 are made of a high-strength nonmagnetic material such as stainless steel.
  • the conductive metal plate 43 is made of a material having conductivity equivalent to that of the conductive metal plate 33, for example, copper or a copper alloy.
  • the second divided wedge 45 is a composite wedge including a second divided upper wedge 46, a second divided lower wedge 47, and a conductive metal plate 48.
  • the second divided lower wedge 47 is made longer than the second divided upper wedge 46 in the axial direction, and a convex portion 47a extending in the axial direction is formed at the center of the upper surface.
  • the conductive metal plate 48 is formed in a rectangular flat plate shape, arranged on the convex portion 47a, folded back from the second divided lower wedge 47 to the other side in the axial direction, and in the axial direction of the second divided lower wedge 47. It extends along the other end surface and is arranged along the lower surface of the second divided lower wedge 47.
  • the mounting region of the conductive metal plate 48 on the other end surface in the axial direction of the second divided lower wedge 47 is formed in the recess, and the other end surface in the axial direction of the second divided lower wedge 47 and the conductive metal plate 48 is the same.
  • the mounting area of the conductive metal plate 48 on the lower surface of the second divided lower wedge 47 is formed in the recess, and the lower surface of the second divided lower wedge 47 and the conductive metal plate 48 are flush with each other. .
  • the conductive metal plate 48 is disposed on the convex portion 47 a, folds the protruding portion from the second divided lower wedge 47 to the one side in the axial direction, and extends along one axial end surface of the second divided lower wedge 47. Extend. Further, the conductive metal plate 48 is arranged along the upper surface, the one end surface in the axial direction, and the lower surface of the projecting portion of the second divided lower wedge 47 toward the one end side in the axial direction.
  • one end surface of the second divided lower wedge 47 in the axial direction, and further, the upper surface of the protruding portion on the one side in the axial direction of the second divided lower wedge 47, the one end surface in the axial direction, and the conductive metal plate 48 on the lower surface The region is formed in the recess, and the conductive metal plate 48 is disposed flush with the second divided lower wedge 47.
  • the second divided upper wedge 46 has a concave portion 46a that can be fitted to the convex portion 47a at the center of the lower surface.
  • the second divided wedge 45 is configured by fitting the concave portion 46 a to the convex portion 47 a and integrating the second divided upper wedge 46 and the second divided lower wedge 47.
  • the second divided lower wedge 47 protrudes from the second divided upper wedge 46 to one axial end side, and the other axial end surfaces of the second divided upper wedge 46 and the second divided lower wedge 47 are flush with each other.
  • the integrated second divided upper wedge 46 and the second divided lower wedge 47 serve as a main body portion
  • the conductive metal plate 48 serves as an energizing body.
  • the method of integrating the second divided upper wedge 46 and the second divided lower wedge 47 is the same as in the first embodiment.
  • the radial ventilation path 20 is formed in the second divided upper wedge 46, the second divided lower wedge 47, and the conductive metal plate 48.
  • the second divided upper wedge 46 and the second divided lower wedge 47 are made of a high-strength nonmagnetic material such as stainless steel.
  • the conductive metal plate 48 is made of the same material as the conductive metal plate 43.
  • the second split wedge 45 installed at one end in the axial direction of the slot 10 is described. However, at the other end in the axial direction of the slot 10, the second split wedge 45 is replaced by the second split lower wedge 47. It is installed so as to protrude from the second divided upper wedge 46 to the other end side in the axial direction.
  • the conductive metal plate 43 has a conductive function in the first divided wedge 40, the first divided upper wedge 41 and the first divided lower wedge 42 that hold the conductive metal plate 43. Therefore, high conductivity is not necessary.
  • the second divided wedge 45 the characteristics required for the first divided upper wedge 41, the first divided lower wedge 42, the second divided upper wedge 46, and the second divided lower wedge 47 can be specialized in strength.
  • the first divided upper wedge 41, the first divided lower wedge 42, the second divided upper wedge 46 and the second divided lower wedge 47 are made stronger than the conductive metal plate 43 and the conductive metal plate 48.
  • a material such as stainless steel can be used.
  • the same effect as in the first embodiment can be obtained.
  • the conductive metal plates 43 and 48 are installed on the convex portion 42a of the first divided lower wedge 42 and the convex portion 47a of the second divided lower wedge 47, the conductive metal plates The distance between the plates 43 and 48 and the armature winding 5 is shortened. Thereby, the eddy current induced in the conductive metal plates 43 and 48 by the magnetic flux from the armature winding 5 increases, and the heat generation of the rotor core 8 due to the eddy current is suppressed.
  • FIG. FIG. 22 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 3 of the present invention.
  • the third divided wedge 30 ⁇ / b> A is installed in the slot 10 instead of each of the third divided wedges 18, except that the damper bar 13 is omitted.
  • the configuration is the same as in the first embodiment.
  • the wedge is divided into a first divided wedge 30, a second divided wedge 35, and a third divided wedge 30A.
  • the third divided wedge 30A is a composite wedge configured in the same manner as the first divided wedge 30 except that the axial length is short.
  • all the wedges installed in each of the slots 10 of the rotor core 8 are constituted by the composite wedges of the first divided wedge 30, the second divided wedge 35, and the third divided wedge 30A. Therefore, the same effect as in the first embodiment can be obtained.
  • the second split wedges 35 are installed at both axial ends of the slot 10 of the rotor core 8, and the first split wedge 30 and the third split wedge 30 ⁇ / b> A are 1 between the second split wedges 35. Arranged in rows and installed in slots 10. Thereby, the conductive metal plate 33 of the first divided wedge 30 and the third divided wedge 30A and the first conductive metal plate 38a and the second conductive metal plate 38b of the second divided wedge 35 are in electrical contact with each other. In the state, they are arranged in a line in the axial direction.
  • the conductive metal plate 33, the first conductive metal plate 38a, and the second conductive metal plate 38b arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13.
  • the damper bar 13 can be omitted.
  • the distance between the field winding 11 and the armature winding 5 is further shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5.
  • the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is further improved.
  • the first divided wedge 30, the second divided wedge 35, and the third divided wedge 30A are respectively integrated by using bonding and any one of welding, brazing, and stir welding. May be.
  • the upper and lower wedges prior to the joining process by any of welding, brazing and stir welding, the upper and lower wedges are positioned and fixed with high precision by bonding the upper and lower wedges by bonding. it can. Thereby, the precision of the shape after joining by any of welding, brazing, and stirring joining is improved. As a result, the unevenness in the axial direction on the axial end surfaces of the first divided wedge 30, the second divided wedge 35, and the third divided wedge 30A is reduced.
  • the contact area between the first divided wedge 30 and the third divided wedge 30A, between the third divided wedge 30A, and between the third divided wedge 30A and the second divided wedge 35 is increased, and the conductive metal plate Heat generation at the contact portion between 33 and the contact portion between the conductive metal plate 33 and the first conductive metal plate 38a is reduced.
  • FIG. FIG. 23 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 4 of the present invention.
  • the third divided wedge 40A is installed in the slot 10 in place of the third divided wedge 18, and the damper bar 13 is omitted, except that the damper bar 13 is omitted.
  • the configuration is the same as in the second embodiment.
  • the wedge is divided into a first divided wedge 40, a second divided wedge 45, and a third divided wedge 40A.
  • the third split wedge 40A is a composite wedge configured in the same manner as the first split wedge 40 except that the axial length is short.
  • all the wedges installed in each of the slots 10 of the rotor core 8 are constituted by the composite wedges of the first divided wedge 40, the second divided wedge 45, and the third divided wedge 40A. Therefore, the same effect as in the second embodiment can be obtained.
  • the second divided wedge 45 is installed at both axial ends of the slot 10 of the rotor core 8, and the first divided wedge 40 and the third divided wedge 40 ⁇ / b> A are 1 between the second divided wedges 45. Arranged in rows and installed in slots 10. Thereby, the conductive metal plates 43 of the first divided wedge 40 and the third divided wedge 40A and the conductive metal plates 48 of the second divided wedge 45 are arranged in a line in the axial direction in a state where they are in electrical contact with each other. ing. Thus, the conductive metal plate 43 and the conductive metal plate 48 arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. .
  • the distance between the field winding 11 and the armature winding 5 is further shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5.
  • the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is further improved.
  • the first divided wedge 40, the second divided wedge 45, and any one of adhesion, welding, brazing, and stirring joining are used together.
  • the third divided wedge 40A may be integrated.
  • the first divided wedge and the second divided are used in combination with adhesion and any one of welding, brazing, and stir welding. Each wedge may be integrated.
  • FIG. FIG. 24 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 5 of the present invention.
  • the first lump wedge 50 is installed in the center of the slot 10 in place of the first split wedge 30 and the second lump wedge 51 is replaced by the second split wedge 35.
  • the configuration is the same as that of the third embodiment except that it is installed at both ends in the axial direction of the slot 10 instead.
  • the wedge is divided into a first lump wedge 50, a second lump wedge 51, and a third divided wedge 30A.
  • the first lump wedge 50 and the second lump wedge 51 are made of the same highly conductive material as that of the conductive metal plate 33, for example, copper or a copper alloy in one lump.
  • the conductive metal plates 33 of the first lump wedge 50, the second lump wedge 51, and the third divided wedge 30A are arranged in a line in the axial direction in a state of being in electrical contact with each other. Yes.
  • the first lump wedges 50, the second lump wedges 51, and the conductive metal plate 33 arranged in a line in the axial direction in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, in the fifth embodiment, the same effect as in the third embodiment can be obtained.
  • first lump wedge 50 and the second lump wedge 51 are made into a lump with a highly conductive metal, the contact resistance between the first lump wedge 50 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 51 and the retaining ring 9 is reduced. Thereby, more eddy currents flowing on the surface of the rotor core 8 can be supplied to the conductive metal plate 33 functioning as a damper bar. As a result, heat generation of the rotor core 8 due to eddy current can be suppressed.
  • the contact resistance may be reduced by plating with gold, silver or the like.
  • the first lump wedge 50 is installed at the center in the axial direction of the slot 10 instead of the first split wedge 30, and the second lump wedge 51 is the first lump wedge 51.
  • the first lump wedge 50 is replaced with the first divided wedge 40 in the axial center of the slot 10 instead of the two divided wedges 35.
  • the second lump wedge 51 may be installed at both ends in the axial direction of the slot 10 instead of the second divided wedge 45.
  • FIG. 25 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 6 of the present invention
  • FIG. 26 shows a first rotor of the rotary electric machine according to Embodiment 6 of the present invention.
  • 27 is a longitudinal sectional view showing the divided wedge
  • FIG. 27 is an end view of the first divided wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention viewed from the axial direction
  • FIG. 28 is an embodiment of the present invention.
  • FIG. 29 is a longitudinal sectional view showing a second divided wedge of the rotor in the rotary electric machine according to FIG. 6, and FIG.
  • FIG. 29 is a view of the second divided wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention from the other end side in the axial direction.
  • FIG. 30 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention as viewed from one end in the axial direction.
  • the first divided wedge 60 is installed at the central portion in the axial direction of the slot 10 instead of the first divided wedge 30, and the second divided wedge 65 is the second divided wedge.
  • 35 is installed at both ends in the axial direction of the slot 10, and a plurality of third divided wedges 60 ⁇ / b> A are arranged between the first divided wedge 60 and the second divided wedge 65 of the slot 10 instead of the third divided wedge 30 ⁇ / b> A. is set up.
  • the wedge is divided into a first divided wedge 60, a second divided wedge 65, and a third divided wedge 60A. Other configurations are the same as those in the third embodiment.
  • the first split wedge 60 is a composite wedge including a first split upper wedge 61, a first split lower wedge 62, and a conductive metal plate 63, as shown in FIGS.
  • the first divided lower wedge 62 is formed as a prism having a parallelogram-shaped vertical cross section inclined toward one side in the axial direction, and a concave portion 62a having the axial direction in the groove direction is formed at the center of the upper surface.
  • the conductive metal plate 63 is formed in a rectangular flat plate shape, is disposed in the recess 62a, and folds the protruding portions from the first divided lower wedge 62 to both sides in the axial direction so that both end surfaces of the first divided lower wedge 62 in the axial direction are folded back.
  • segmentation upper wedge 61 has the convex part 61a which can be fitted with the recessed part 62a in the lower surface center part.
  • the exposed surfaces on both axial sides of the conductive metal plate 63 are inclined surfaces 64.
  • the first divided wedge 60 is configured by fitting the convex portion 61a into the concave portion 62a and integrating the first divided upper wedge 61 and the first divided lower wedge 62 together.
  • the integrated first divided upper wedge 61 and the first divided lower wedge 62 serve as a main body portion
  • the conductive metal plate 63 serves as a current-carrying body.
  • the radial ventilation path 20 is formed in the first divided upper wedge 61, the first divided lower wedge 62 and the conductive metal plate 63.
  • the first divided upper wedge 61 and the first divided lower wedge 62 are made of a high-strength nonmagnetic material such as stainless steel.
  • the conductive metal plate 63 is made of the same material as the conductive metal plate 33, for example, copper or a copper alloy.
  • the third split wedge 60A is a composite wedge configured in the same manner as the first split wedge 60 except that the axial length is short. Also in the third divided wedge 60 ⁇ / b> A, the exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64.
  • the second divided wedge 65 includes a second divided upper wedge 66, a second divided lower wedge 67, a first conductive metal plate 68a, and a second conductive metal plate 68b. And a composite wedge.
  • the second divided lower wedge 67 is formed as a prism having a longer length in the axial direction than the second divided upper wedge 66, the other axial end face of the rectangular parallelepiped is inclined toward one side in the axial direction, and a concave portion 67a having the groove direction as the axial direction. Is formed at the center of the upper surface.
  • the inclination angle of the other axial end surface of the second divided lower wedge 67 is the same as the inclination angle of the other axial end surface of the first divided lower wedge 62.
  • the first conductive metal plate 68a is formed in a rectangular flat plate shape, and is disposed in the recess 67a.
  • the first conductive metal plate 68a is bent in the axial direction of the second divided lower wedge 67 by folding back the protruding portions from the second divided lower wedge 67 to both sides in the axial direction. It extends along both end faces and is arranged along the lower surface of the second divided lower wedge 67.
  • the mounting regions of the first conductive metal plates 68a on both end surfaces in the axial direction of the second divided lower wedge 67 are formed in the recesses, and both end surfaces in the axial direction of the second divided lower wedge 67 and the first The conductive metal plate 68a is flush.
  • the mounting region of the first conductive metal plate 68a on the lower surface of the second divided lower wedge 67 is formed in the recess, and the lower surface of the second divided lower wedge 67 and the first conductive metal plate 68a are flush with each other. It has become.
  • segmentation upper wedge 66 has the convex part 66a which can be fitted with the recessed part 67a in the lower surface center part.
  • the second conductive metal plate 68b is formed in a rectangular flat plate shape, and is disposed on the convex portion 66a.
  • the second conductive metal plate 68b is folded back from the second divided upper wedge 66 toward the one end side in the axial direction, so that the axis of the second divided upper wedge 66 is obtained. It arrange
  • the mounting region of the second conductive metal plate 68b on the one end surface in the axial direction of the second divided upper wedge 66 is formed in the concave portion, and one end surface in the axial direction of the second divided upper wedge 66 and the second end wedge
  • the conductive metal plate 68b is flush.
  • segmentation wedge 65 fits the convex part 66a to the recessed part 67a, and is comprised by integrating the 2nd division
  • the second divided lower wedge 67 protrudes from the second divided upper wedge 66 to one axial end side.
  • the integrated second divided upper wedge 66 and second divided lower wedge 67 serve as the main body
  • the first conductive metal plate 68a and the second conductive metal plate 68b serve as the current conductor.
  • An exposed surface on the other axial side of the second divided upper wedge 66 of the first conductive metal plate 68a is an inclined surface 69.
  • the radial ventilation path 20 is formed in the second divided upper wedge 66, the second divided lower wedge 67, the first conductive metal plate 68a, and the second conductive metal plate 68b.
  • the second divided upper wedge 66 and the second divided lower wedge 67 are made of a high-strength nonmagnetic material such as stainless steel.
  • the first conductive metal plate 68 a and the second conductive metal plate 68 b are made of the same material as the conductive metal plate 63.
  • two metal plates of the first conductive metal plate 68a and the second conductive metal plate 68b are used, one metal plate is used, and the second divided wedge 65 extends to one end side in the axial direction.
  • the protruding portion may be divided and folded up and down.
  • the second split wedge 65 installed at one end in the axial direction of the slot 10 is described.
  • the second split wedge 65 is replaced by the second split lower wedge 67. It is installed so as to protrude from the second divided upper wedge 66 to the other end side in the axial direction.
  • the first divided wedge 60, the second divided wedge 65, and the third divided wedge 60A are divided into upper and lower parts at locations where a compression load is applied when the rotor 6 receives centrifugal force during rotation.
  • the first divided wedge 60, the second divided wedge 65, and the third divided wedge 60A are integrated by, for example, the same method as in the first embodiment.
  • the second divided wedges 65 are installed at both axial ends of the slot 10, and the first divided wedge 60 and the third divided wedge 60 ⁇ / b> A are arranged in a row between the second divided wedges 65. They are arranged in slots 10.
  • the exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64.
  • the exposed surface of the first conductive metal plate 68 a on the third divided wedge 60 ⁇ / b> A side is an inclined surface 69. The inclination angles of these inclined surfaces 64 and 69 are the same.
  • the conductive metal plate 63 of the adjacent first divided wedge 60 and the conductive metal plate 63 of the third divided wedge 60A are in electrical contact.
  • the conductive metal plates 63 of the adjacent third divided wedges 60A are in electrical contact with each other.
  • the conductive metal plate 63 of the adjacent third divided wedge 60A and the first conductive metal plate 68a of the second divided wedge 65 are in electrical contact.
  • the conductive metal plate 63, the first conductive metal plate 68a and the second conductive metal plate 68b arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13.
  • the damper bar 13 can be omitted.
  • the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5.
  • the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is improved.
  • the first split wedge 60, the second split wedge 65, and the third split The main body of the wedge 60A can be made of a high-strength nonmagnetic material, and the thickness can be reduced. Thereby, the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5. As a result, the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is improved.
  • the inclined surfaces 64 of the conductive metal plates 63 of the adjacent first divided wedge 60 and third divided wedge 60A overlap each other in the surface contact state.
  • the inclined surfaces 64 of the conductive metal plates 63 of the adjacent third divided wedges 60A overlap each other in the radial direction and are in a surface contact state.
  • the inclined surfaces 64 and 69 of the adjacent conductive metal plate 63 of the third divided wedge 60A and the first conductive metal plate 68a of the second divided wedge 65 overlap with each other in the radial direction to form surface contact. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor. Thereby, the contact resistance of the electrical connection portion of the conductive metal plate 63, the first conductive metal plate 68a, and the second conductive metal plate 68b is reduced, and heat generation at the contact portion is suppressed.
  • the first divided wedge 60, the second divided wedge 65, and the third divided wedge 60A according to the sixth embodiment are the same as the first divided wedge 30, the second divided wedge 35, and the third divided wedge in the third embodiment.
  • the exposed surface of the 30A conductive metal plate has the same configuration as the inclined surface. Therefore, even if the exposed surfaces of the conductive metal plates of the first divided wedge 40, the second divided wedge 45, and the third divided wedge 40A in the fourth embodiment are configured as inclined surfaces, the same effect can be obtained.
  • FIG. 31 is a longitudinal sectional view of a main part showing the periphery of a slot of a rotor in a rotary electric machine according to Embodiment 7 of the present invention
  • FIG. 32 is a first view of the rotor in the rotary electric machine according to Embodiment 7 of the present invention
  • FIG. 33 is a longitudinal sectional view showing the second wedge of the rotor in the rotary electric machine according to Embodiment 7 of the present invention.
  • the first lump wedge 70 is installed at the center in the axial direction of the slot 10 in place of the first split wedge 60, and the second lump wedge 72 is the second split wedge 65.
  • the configuration is the same as that of the sixth embodiment except that it is installed at both ends in the axial direction of the slot 10 instead.
  • the wedge is divided into a first lump wedge 70, a second lump wedge 72, and a third divided wedge 60A.
  • the first lump wedge 70 is made in one lump with a highly conductive material similar to that of the conductive metal plate 63, for example, copper or copper alloy. As shown in FIG. 32, the inclined surface 71 is formed on the lower side of both axial end surfaces of the first lump wedge 70.
  • the second lump wedge 72 is made of a highly conductive material similar to that of the conductive metal plate 63, such as copper or a copper alloy, in one lump. As shown in FIG. 33, the inclined surface 73 is formed on the lower side of the other end surface in the axial direction of the second massive wedge 72.
  • the conductive metal plates 63 of the first massive wedge 70, the second massive wedge 72, and the third divided wedge 60A are arranged in a line in the axial direction in a state of being in electrical contact with each other. Yes.
  • the first lump wedge 70, the second lump wedge 72, and the conductive metal plate 63 arranged in a line in the axial direction in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, in the seventh embodiment, the same effect as in the sixth embodiment can be obtained.
  • first lump wedge 70 and the second lump wedge 72 are made into a lump with a highly conductive metal, the contact resistance between the first lump wedge 70 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 72 and the retaining ring 9 is reduced. Thereby, more eddy currents flowing on the surface of the rotor core 8 can be supplied to the conductive metal plate 63 functioning as a damper bar. As a result, heat generation of the rotor core 8 due to eddy current can be suppressed.
  • the inclined surfaces 71 and 64 of the conductive metal plate 63 of the adjacent first lump-like wedge 70 and the third divided wedge 60A overlap each other in the radial direction to form a surface contact state.
  • the inclined surfaces 64 of the conductive metal plates 63 of the adjacent third divided wedges 60A overlap each other in the radial direction and are in a surface contact state.
  • the inclined surfaces 64 and 73 of the conductive metal plate 63 and the second lump wedge 72 of the adjacent third divided wedge 60A overlap in the radial direction and are in surface contact. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor.
  • a third divided wedge having an exposed surface of the conductive metal plate 43 of the third divided wedge 40A in the fourth embodiment as an inclined surface may be used. Good.
  • the contact resistance may be reduced by plating with gold, silver or the like.
  • FIG. 34 is a longitudinal sectional view of a main part showing the periphery of the rotor slot in the rotary electric machine according to Embodiment 8 of the present invention
  • FIG. 35 is a first view of the rotor in the rotary electric machine according to Embodiment 8 of the present invention
  • FIG. 36 is a longitudinal sectional view showing the massive wedge
  • FIG. 36 is an end view of the first massive wedge of the rotor in the rotary electric machine according to Embodiment 8 of the present invention viewed from the axial direction
  • FIG. 37 is an embodiment of the present invention.
  • FIG. 38 is a longitudinal sectional view showing a second lump wedge of the rotor in the rotary electric machine according to FIG. 8, and FIG.
  • FIG. 38 is an end view of the second lump wedge of the rotor in the rotary electric machine according to Embodiment 8 of the present invention as seen from the axial direction.
  • FIG. 39 is a longitudinal sectional view showing a fourth divided wedge of the rotor in the rotary electric machine according to Embodiment 8 of the present invention
  • FIG. 40 shows the fourth of the rotor in the rotary electric machine according to Embodiment 8 of the present invention.
  • End view of the quadrant wedge as seen from the axial direction 41 is a longitudinal sectional view showing a connecting conductor between the wedges of a rotor in a rotary electric machine according to Embodiment 8 of the present invention.
  • FIG. 42 is a view between the wedges of the rotor in the rotary electric machine according to Embodiment 8 of the present invention. It is the end elevation which looked at the connecting conductor from the axial direction.
  • the first lump wedge 74 is installed at the center in the axial direction of the slot 10, and the second lump wedge 76 is installed at both axial ends of the slot 10.
  • a plurality of fourth divided wedges 77 are arranged in a line in the axial direction between the first massive wedge 74 and the second massive wedge 76. Furthermore, the first lump wedge 74 and the fourth split wedge 77 are connected to each other by the fourth split wedge 77, and the fourth split wedge 77 and the second lump wedge 76 are connected using the inter-wedge connection conductor 75. ing. Other configurations are the same as those in the seventh embodiment.
  • the wedge is divided into a first massive wedge 74, a second massive wedge 76, and a fourth divided wedge 77.
  • the first lump wedges 74 are made in one lump with a highly conductive material similar to the conductive metal plate 63, for example, copper or copper alloy. As shown in FIG. 35 and FIG. 36, the recess 79 is formed on the lower side of both end faces in the axial direction of the first lump wedge 74 with the hole direction as the axial direction.
  • the recess 79 has a hole shape in which a cross section orthogonal to the axial direction is rectangular, and the upper surface of the recess 79 is an inclined surface 79 a that gradually approaches the lower surface side in the depth direction of the recess 79.
  • the first lump wedge 74 is configured in the same manner as the first lump wedge 70 except that the recess 79 is formed.
  • the second lump wedges 76 are made in one lump with a highly conductive material similar to the conductive metal plate 63, for example, copper or copper alloy. As shown in FIGS. 37 and 38, the recess 80 is formed on the lower side of the end face of the second lump wedge 76 facing the fourth split wedge 77.
  • the recess 80 has a hole shape in which a cross section orthogonal to the axial direction is a rectangle, and the upper surface of the recess 80 is an inclined surface 80 a that gradually approaches the lower surface side in the depth direction of the recess 80.
  • the second lump wedge 76 is configured in the same manner as the second lump wedge 72 except that the recess 80 is formed.
  • the fourth divided wedge 77 is a composite wedge including a fourth divided upper wedge 81, a fourth divided lower wedge 82, and a conductive metal plate 78.
  • the recess 83 is formed on the lower side of both end faces in the axial direction of the fourth divided lower wedge 82.
  • the recess 83 has a hole shape having a rectangular cross section orthogonal to the axial direction, and the upper surface of the recess 83 is an inclined surface that gradually approaches the lower surface side in the depth direction of the recess 83.
  • the conductive metal plate 78 is formed in a rectangular flat plate shape, and is sandwiched between the fourth divided upper wedge 81 and the fourth divided lower wedge 82 in a state of projecting to both sides in the axial direction.
  • the protruding portion of the conductive metal plate 78 extends downward along both axial end surfaces of the fourth divided lower wedge 82, and is drawn into the recess 83.
  • the conductive metal plate 78 drawn into the recess 83 is disposed along the inclined surface of the recess 83.
  • the lower surface of the portion of the conductive metal plate 78 disposed along the inclined surface of the recess 83 is an inclined surface 78a.
  • the fourth divided upper wedge 81 and the fourth divided lower wedge 82 are made of a high-strength nonmagnetic material such as stainless steel.
  • the conductive metal plate 78 is made of the same material as the conductive metal plate 63, for example, copper or a copper alloy.
  • the first lump wedge 74, the second lump wedge 76, and the fourth split wedge 77 have the same cross-sectional shape orthogonal to the axial direction.
  • the recess 79, the recess 80, and the recess 83 in a state where the end portions of the conductive metal plate 78 are arranged have the same hole shape.
  • the first lump wedge 74 and the fourth divided wedge 77 are arranged such that the recess 79 and the recess 83 face each other.
  • the second lump wedge 76 and the fourth divided wedge 77 are arranged such that the recess 80 and the recess 83 are opposed to each other.
  • the fourth divided wedge 77 is configured by integrating a fourth divided upper wedge 81 and a fourth divided lower wedge 82.
  • the integrated fourth divided upper wedge 81 and the fourth divided lower wedge 82 serve as a main body portion
  • the conductive metal plate 78 serves as a current-carrying body.
  • the wedge connecting conductor 75 is made of the same material as the conductive metal plate 78, for example, copper or a copper alloy. As shown in FIGS. 41 and 42, the inter-wedge connecting conductor 75 can be fitted into a recess 83 in which both ends in the axial direction are the recess 79, the recess 80, and the end of the conductive metal plate 78. It is formed in a simple shape. The upper surfaces of both end portions in the axial direction of the connection conductor 75 between the wedges overlap the inclined surfaces 79a, 80a, 78a of the recess 83 in a state where the recess 79, the recess 80, and the end portion of the conductive metal plate 78 are disposed. It becomes the inclined surface 75a which carries out surface contact in the state.
  • the first lump wedges 74, the second lump wedges 76, and the fourth split wedges 77 thus configured are arranged in a row in the axial direction in the slot 10 with the inter-wedge connection conductors 75 interposed therebetween.
  • both ends of the inter-wedge connection conductor 75 are fitted in the recesses 79, 80 and 83.
  • the inclined surfaces 75a which are the upper surfaces of both end portions in the axial direction of the inter-wedge connection conductor 75, are in surface contact with the recesses 79, 80 and the 83 inclined surfaces 79a, 80a, 78a in the radial direction.
  • the first lump wedges 74, the second lump wedges 76, and the fourth divided wedges 77 arranged in a row in the slot 10 are electrically connected.
  • the conductive metal plates 78 of the first massive wedge 74, the second massive wedge 76, and the fourth divided wedge 77 are in the axial direction in a state of being in electrical contact with each other by the inter-wedge connecting conductor 75. It is arranged in one row. As described above, the first lump wedge 74, the second lump wedge 76, and the conductive metal plate 78 arranged in a line in the axial direction in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, in the eighth embodiment, the same effect as in the seventh embodiment can be obtained.
  • first massive wedge 74 and the second massive wedge 76 are made of a highly conductive metal into a massive body, the contact resistance between the first massive wedge 74 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 76 and the retaining ring 9 is reduced. Thereby, more eddy currents flowing on the surface of the rotor core 8 can be supplied to the conductive metal plate 78 functioning as a damper bar. As a result, heat generation of the rotor core 8 due to eddy current can be suppressed.
  • the upper surface of the inner wall surface of the recess 79 formed in the first lump wedge 74 is an inclined surface 79 a that gradually displaces toward the inner diameter side in the depth direction of the recess 79.
  • the upper surface of the inner wall surface of the recess 80 formed in the second lump wedge 76 forms an inclined surface 80a that gradually displaces toward the inner diameter side in the depth direction of the recess 80.
  • the lower surface of the conductive metal plate 78 disposed on the upper surface of the inner wall surface of the recess 83 formed in the fourth split wedge 77 forms an inclined surface 78 a that gradually displaces toward the inner diameter side in the depth direction of the recess 83.
  • Both end portions in the axial direction of the connecting conductor 75 between the wedges are fitted into the recesses 79, 80, and 83, and the inclined surface 75a overlaps the inclined surfaces 79a, 80a, and 78a in the radial direction to form a surface contact state. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor 6. Accordingly, the electrical connection portion between the first lump wedge 74 and the inter-wedge connection conductor 75, the electrical connection portion between the conductive metal plate 78 of the fourth split wedge 77 and the inter-wedge connection conductor 75, and the second lump wedge. The contact resistance of the electrical connection portion between 76 and the inter-wedge connection conductor 75 is reduced, and heat generation at the contact portion is suppressed.
  • a third divided wedge provided with an inclined recess on the exposed surface of the conductive metal plate 43 of the third divided wedge 40A in the fourth embodiment is used. Also good.
  • the contact surface of the first massive wedge 74 with the inter-wedge connection conductor 75, the contact surface of the second massive wedge 76 with the inter-wedge connection conductor 75, and the contact surface with the holding ring 9 of the second massive wedge 76 are provided.
  • the contact resistance may be reduced by plating with a conductive metal that is higher than the first massive wedge 74 and the second massive wedge 76, such as gold or silver.
  • the contact surface of the conductive metal plate 85 of the fourth divided wedge 77 with the inter-wedge connection conductor 75 is plated with a conductive metal higher than the conductive metal plate 85, for example, gold, silver, etc. May be reduced.
  • FIG. 43 is a longitudinal sectional view of the main part showing the periphery of the slot of the rotor in the rotary electric machine according to Embodiment 9 of the present invention
  • FIG. 44 shows the fifth aspect of the rotor in the rotary electric machine according to Embodiment 9 of the present invention.
  • FIG. 45 is a longitudinal sectional view showing the divided wedge
  • FIG. 45 is an end view of the fifth divided wedge of the rotor in the rotary electric machine according to Embodiment 9 of the present invention as seen from the axial direction.
  • the fourth divided wedge 77 is installed at the center in the axial direction of the slot 10, and the fifth divided wedge 84 is installed at both axial ends of the slot 10. Further, a plurality of fourth divided wedges 77 are installed between a fourth divided wedge 77 installed at the center and fifth divided wedges 84 installed at both ends.
  • the fourth divided wedges 77 are electrically connected by the inter-wedge connecting conductor 75, and the fourth divided wedge 77 and the fifth divided wedge 84 are electrically connected by the inter-wedge connecting conductor 75.
  • Other configurations are the same as those in the eighth embodiment.
  • the wedge is divided into a fourth divided wedge 77 and a fifth divided wedge 84.
  • the fifth divided wedge 84 is a composite wedge including a fifth divided upper wedge 88, a fifth divided lower wedge 87, and a conductive metal plate 85.
  • a recess 86 is formed on the lower side of the end face of the fifth divided lower wedge 87 facing the fourth divided wedge 77.
  • the indentation 86 has a hole shape in which a cross section perpendicular to the axial direction is rectangular, and the upper surface of the indentation 86 is an inclined surface that gradually approaches the lower surface side in the depth direction of the indentation 86.
  • the conductive metal plate 85 is formed in a rectangular flat plate shape, and is sandwiched between the fifth divided upper wedge 88 and the fifth divided lower wedge 87 in a state of protruding in the axial direction.
  • One projecting portion of the conductive metal plate 85 extends downward along the end surface of the fifth divided lower wedge 87 and is drawn into the recess 86.
  • the conductive metal plate 85 drawn into the recess 86 is disposed along the inclined surface of the recess 86.
  • the lower surface of the portion of the conductive metal plate 85 disposed along the inclined surface of the recess 86 is an inclined surface 85a.
  • the fifth divided upper wedge 88 and the fifth divided lower wedge 87 are made of a high-strength nonmagnetic material such as stainless steel.
  • the conductive metal plate 85 is made of the same material as the conductive metal plate 63, for example, copper or a copper alloy.
  • the electrical connection portion of the fifth divided wedge 84 with the holding ring 9 is configured in the same manner as the second divided wedge 45.
  • the fourth split wedge 77 and the fifth split wedge 84 have the same cross-sectional shape orthogonal to the axial direction.
  • the recess 83 in a state where the end portion of the conductive metal plate 78 is disposed and the recess 86 in a state where the end portion of the conductive metal plate 85 is disposed have the same hole shape.
  • the fourth divided wedges 77 are arranged so that the recesses 83 face each other.
  • the fourth divided wedge 77 and the fifth divided wedge 84 are arranged such that the recess 83 and the recess 86 face each other.
  • the fifth divided wedge 84 is configured by integrating a fifth divided upper wedge 88 and a fifth divided lower wedge 87.
  • the integrated fifth divided upper wedge 88 and the fifth divided lower wedge 87 serve as a main body portion
  • the conductive metal plate 85 serves as a current-carrying body.
  • the conductive metal plates 78 of the fourth divided wedge 77 and the conductive metal plates 78 of the fourth divided wedge 77 and the conductive metal plate 85 of the fifth divided wedge 84 are connected between the wedges.
  • the conductors 75 are arranged in a line in the axial direction so as to be in electrical contact with each other.
  • the conductive metal plate 78 of the fourth divided wedge 77 and the conductive metal plate 85 of the fifth divided wedge 84 arranged in a line in the axial direction in a state of being in electrical contact with each other are used as the damper bar 13. It functions and the damper bar 13 can be omitted. Therefore, in the ninth embodiment, the same effect as in the eighth embodiment can be obtained.
  • the lower surface of the conductive metal plate 78 disposed on the upper surface of the inner wall surface of the recess 83 formed in the fourth divided wedge 77 forms an inclined surface 78 a that gradually displaces toward the inner diameter side in the depth direction of the recess 83.
  • the lower surface of the conductive metal plate 85 disposed on the upper surface of the inner wall surface of the recess 86 formed in the fifth divided wedge 84 forms an inclined surface 85 a that gradually displaces toward the inner diameter side in the depth direction of the recess 86.
  • Both end portions in the axial direction of the connecting conductor 75 between the wedges are fitted into the recesses 83 and 86, and the inclined surface 75a overlaps the inclined surfaces 78a and 85a in the radial direction to be in a surface contact state. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor 6. Thereby, the electrical connection between the conductive metal plate 78 of the fourth split wedge 77 and the inter-wedge connection conductor 75 and the electrical connection between the conductive metal plate 85 of the fifth split wedge 84 and the inter-wedge connection conductor 75. The contact resistance of the contact portion is reduced, and heat generation at the contact portion is suppressed.
  • a third divided wedge provided with an inclined recess on the exposed surface of the conductive metal plate 43 of the third divided wedge 40A in the fourth embodiment is used. Also good.
  • the contact surface of the divided wedge 84 with the holding ring 9 of the conductive metal plate 85 is plated with a conductive metal higher than the conductive metal plates 78 and 85, such as gold and silver, to reduce the contact resistance. Also good.
  • the generator has been described.
  • the present invention is not limited to the generator, and can be applied to rotating electric machines such as an electric motor and a generator motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

This rotary electric machine is provided with an armature and a rotor, wherein the rotor has: a rotor core which has a plurality of slots open radially outward and extending in the axial direction thereof; field windings accommodated in the respective slots; a plurality of split wedges which are accommodated in the opening sides of the respective slots so as to be arranged in the axial direction, and which fixedly hold the field windings inside the slots; and holding rings attached to both axial end sections of the rotor core . The plurality of split wedges each include a composite wedge, and the composite wedge is provided with a main body part that holds the field winding and a conductive body which is held by the main body part and through which an overcurrent flows, wherein the main body part is manufactured by using a non-magnetic material having a higher strength than the conductive body, and the conductive body is manufactured by using a metal having a higher conductivity than the main body part.

Description

回転電機およびその製造方法Rotating electric machine and manufacturing method thereof
　この発明は、円筒形の回転子を有する回転電機およびその製造方法に関し、例えば、タービン発電機に適用される回転電機の回転子構造に関するものである。 The present invention relates to a rotating electrical machine having a cylindrical rotor and a method for manufacturing the same, and, for example, relates to a rotor structure of a rotating electrical machine applied to a turbine generator.
　回転子の界磁巻線に界磁電流を流して電磁石とする従来の発電機においては、界磁巻線は、回転子コアに設けられた溝状のスロット内に設置されている。スロットには、界磁巻線以外にも、電機子巻線からの磁束により誘起された渦電流が流れるダンパーバー、ダンパーバーと界磁巻線との間を絶縁する絶縁物、およびスロット内容物の飛散防止用のくさびが設置されている（例えば、特許文献１参照）。 In a conventional generator in which a field current is passed through a rotor field winding to make an electromagnet, the field winding is installed in a groove-like slot provided in the rotor core. In addition to the field winding, the slot includes a damper bar through which an eddy current induced by the magnetic flux from the armature winding flows, an insulator that insulates the damper bar from the field winding, and the slot contents A wedge for preventing scattering is installed (for example, see Patent Document 1).
　従来の発電機では、絶縁物、ダンパーバーおよびくさびが、界磁巻線よりも回転子コアの外周側に設置されている。飛散防止用のくさびは、回転子コアの軸方向中央部におけるダンパーバー間を導電させ、かつ回転子コアの軸方向端部におけるダンパーバーと保持環とを導電させる機能を有する。そのため、くさびは、導電性が高い金属、例えば、ＢｅＣｕ合金により作製されている。なお、導電性が高いとは、電気を通しやすいことを意味する。 In a conventional generator, an insulator, a damper bar, and a wedge are installed on the outer peripheral side of the rotor core with respect to the field winding. The wedge for preventing scattering has a function of conducting between the damper bars at the axial center of the rotor core and conducting between the damper bar and the holding ring at the axial end of the rotor core. Therefore, the wedge is made of a metal having high conductivity, for example, a BeCu alloy. Note that high conductivity means that it is easy to conduct electricity.
特開２００１－８６６８５号公報JP 2001-86685 A
　くさびが導電性の高い金属で作製されているので、界磁巻線、絶縁物、ダンパーバーに作用する遠心力に耐えるために、くさびを半径方向に厚くする必要があった。これにより、界磁巻線と電機子巻線との間の距離が長くなり、界磁巻線で発生させた磁束の一部が電機子巻線に鎖交しなくなり、回転子コアでの損失が大きくなっていた。 Since the wedge is made of a highly conductive metal, it was necessary to thicken the wedge in the radial direction in order to withstand the centrifugal force acting on the field windings, insulators, and damper bars. This increases the distance between the field winding and the armature winding, and a part of the magnetic flux generated by the field winding does not interlink with the armature winding, resulting in loss in the rotor core. Was getting bigger.
　ここで、くさびを高強度非磁性材、例えばステンレス鋼で作製した場合、くさびは、半径方向に厚くすることなく、界磁巻線、絶縁物、ダンパーバーに作用する遠心力に耐えることができる。これにより、界磁巻線と電機子巻線との間の距離が短くなり、界磁巻線で発生させた磁束の電機子巻線を鎖交する量が多くなり、回転子コアでの損失を低減することができる。その結果、界磁電流を削減でき、効率が向上される。しかしながら、ステンレス鋼などの高強度非磁性材料は、導電性が低い。そのため、回転子コアの軸方向中央部および軸方向両端部において、ダンパーバーからの渦電流がくさびを流れにくくなり、くさびでの発熱が増大し、渦電流損が大きくなるという課題があった。 Here, when the wedge is made of a high-strength non-magnetic material, such as stainless steel, the wedge can withstand the centrifugal force acting on the field winding, the insulator, and the damper bar without increasing the thickness in the radial direction. . This shortens the distance between the field winding and the armature winding, increases the amount of magnetic flux generated by the field winding to be linked to the armature winding, and causes a loss in the rotor core. Can be reduced. As a result, the field current can be reduced and the efficiency is improved. However, high-strength nonmagnetic materials such as stainless steel have low conductivity. Therefore, the eddy current from the damper bar hardly flows through the wedge at the axial center portion and both axial end portions of the rotor core, and there is a problem that heat generation at the wedge increases and eddy current loss increases.
　この発明は、このような課題を解決するためになされたものであり、渦電流によるくさびでの発熱を抑えて、効率を向上させることができる回転電機およびその製造方法を得ることを目的とする。 The present invention has been made to solve such a problem, and an object of the present invention is to obtain a rotating electrical machine capable of improving efficiency by suppressing heat generation in a wedge due to eddy current and a manufacturing method thereof. .
　この発明による回転電機は、電機子巻線を備える電機子と、上記電機子の内径側に配置された回転子と、を備える。上記回転子は、半径方向外方に開口し、かつ軸方向に延びるスロットが周方向に複数形成された回転子コアと、上記スロットのそれぞれに収納された界磁巻線と、上記スロットのそれぞれの開口側に軸方向に配列して収納され、上記界磁巻線を上記スロット内に固定保持する複数の分割くさびと、上記回転子コアの軸方向両端部に装着された保持環と、を有する。上記複数の分割くさびは、複合くさびを含み、上記複合くさびは、上記界磁巻線を保持する本体部と、上記本体部に保持され、渦電流が流れる通電体と、を備え、上記本体部は、上記通電体より高強度の非磁性材で作製され、上記通電体は、上記本体部より高導電性の金属で作製されている。 A rotating electric machine according to the present invention includes an armature provided with armature windings, and a rotor arranged on the inner diameter side of the armature. The rotor includes a rotor core having a plurality of slots extending in the radial direction and open in the radial direction and extending in the axial direction, field windings housed in the slots, and the slots. A plurality of split wedges that are housed in an axial arrangement on the opening side of the rotor, and that hold the field winding fixedly in the slot, and retaining rings attached to both axial ends of the rotor core. Have. The plurality of divided wedges include a composite wedge, and the composite wedge includes a main body portion that holds the field winding, and an electric current body that is held by the main body portion and through which an eddy current flows. Is made of a nonmagnetic material having a strength higher than that of the current-carrying body, and the current-carrying body is made of a metal having higher conductivity than the main body.
　この発明によれば、通電体が本体部より高導電性の金属で作製されているので、渦電流による複合くさびでの発熱が抑制される。本体部が通電体より高強度の非磁性材で作製されているので、厚みを薄くして、スロット内容物の飛散を防止できる。そこで、スロット内での界磁巻線の位置が電機子巻線に近づき、界磁電流の削減を可能として、効率を向上させることができる。 According to the present invention, since the current-carrying body is made of a highly conductive metal from the main body, heat generation in the composite wedge due to eddy current is suppressed. Since the main body is made of a nonmagnetic material having a strength higher than that of the current-carrying member, the thickness can be reduced to prevent the slot contents from scattering. Therefore, the position of the field winding in the slot approaches the armature winding, and the field current can be reduced, so that the efficiency can be improved.
この発明の実施の形態１に係る回転電機を示す縦断面図である。It is a longitudinal cross-sectional view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における回転子を示す斜視図である。It is a perspective view which shows the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. 比較例の回転電機における回転子のスロット周りを示す要部横断面図である。It is a principal part cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine of a comparative example. 比較例の回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine of a comparative example. この発明の実施の形態１に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における回転子の第１分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における回転子の第１分割くさびを軸方向から見た端面図である。It is the end elevation which looked at the 1st division wedge of the rotor in the rotary electric machine concerning Embodiment 1 of this invention from the axial direction. この発明の実施の形態１に係る回転電機における回転子の第２分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における回転子の第２分割くさびを軸方向他端側から見た端面図である。It is the end elevation which looked at the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention from the axial direction other end side. この発明の実施の形態１に係る回転電機における回転子の第２分割くさびを軸方向一端側から見た端面図である。It is the end elevation which looked at the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention from the axial direction one end side. この発明の実施の形態１に係る回転電機における回転子のスロット周りを示す要部分解斜視図である。It is a principal part disassembled perspective view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における回転子の第１分割クサビを示す分解斜視図である。It is a disassembled perspective view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における回転子の第２分割クサビを示す分解斜視図である。It is a disassembled perspective view which shows the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における実施態様の回転子のスロット周りを示す要部横断面図である。It is a principal part cross-sectional view which shows the slot periphery of the rotor of the embodiment in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態１に係る回転電機における実施態様の回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor of the embodiment in the rotary electric machine which concerns on Embodiment 1 of this invention. この発明の実施の形態２に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention. この発明の実施の形態２に係る回転電機における回転子の第１分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention. この発明の実施の形態２に係る回転電機における回転子の第１分割くさびを軸方向から見た端面図である。It is the end elevation which looked at the 1st division wedge of the rotor in the rotary electric machine concerning Embodiment 2 of this invention from the axial direction. この発明の実施の形態２に係る回転電機における回転子の第２分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention. この発明の実施の形態２に係る回転電機における回転子の第２分割くさびを軸方向他端側から見た端面図である。It is the end view which looked at the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention from the axial direction other end side. この発明の実施の形態２に係る回転電機における回転子の第２分割くさびを軸方向一端側から見た端面図である。It is the end view which looked at the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 2 of this invention from the axial direction one end side. この発明の実施の形態３に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 3 of this invention. この発明の実施の形態４に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 4 of this invention. この発明の実施の形態５に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 5 of this invention. この発明の実施の形態６に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention. この発明の実施の形態６に係る回転電機における回転子の第１分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention. この発明の実施の形態６に係る回転電機における回転子の第１分割くさびを軸方向から見た端面図である。It is the end elevation which looked at the 1st division wedge of the rotor in the rotary electric machine concerning Embodiment 6 of this invention from the axial direction. この発明の実施の形態６に係る回転電機における回転子の第２分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention. この発明の実施の形態６に係る回転電機における回転子の第２分割くさびを軸方向他端側から見た端面図である。It is the end elevation which looked at the 2nd division wedge of the rotor in the rotary electric machine concerning Embodiment 6 of this invention from the axial direction other end side. この発明の実施の形態６に係る回転電機における回転子の第２分割くさびを軸方向一端側から見た端面図である。It is the end elevation which looked at the 2nd division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 6 of this invention from the axial direction one end side. この発明の実施の形態７に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 7 of this invention. この発明の実施の形態７に係る回転電機における回転子の第１塊状くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st block wedge of the rotor in the rotary electric machine which concerns on Embodiment 7 of this invention. この発明の実施の形態７に係る回転電機における回転子の第２塊状くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 2nd block-shaped wedge of the rotor in the rotary electric machine which concerns on Embodiment 7 of this invention. この発明の実施の形態８に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. この発明の実施の形態８に係る回転電機における回転子の第１塊状くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 1st block wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. この発明の実施の形態８に係る回転電機における回転子の第１塊状くさびを軸方向から見た端面図である。It is the end elevation which looked at the 1st block-shaped wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention from the axial direction. この発明の実施の形態８に係る回転電機における回転子の第２塊状くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 2nd block-shaped wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. この発明の実施の形態８に係る回転電機における回転子の第２塊状くさびを軸方向から見た端面図である。It is the end elevation which looked at the 2nd lump-like wedge of the rotor in the rotary electric machine concerning Embodiment 8 of this invention from the axial direction. この発明の実施の形態８に係る回転電機における回転子の第４分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 4th division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. この発明の実施の形態８に係る回転電機における回転子の第４分割くさびを軸方向から見た端面図である。It is the end elevation which looked at the 4th division wedge of the rotor in the rotary electric machine concerning Embodiment 8 of this invention from the axial direction. この発明の実施の形態８に係る回転電機における回転子のくさび間接続導体を示す縦断面図である。It is a longitudinal cross-sectional view which shows the connection conductor between the wedges of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention. この発明の実施の形態８に係る回転電機における回転子のくさび間接続導体を軸方向から見た端面図である。It is the end elevation which looked at the connection conductor between the wedges of the rotor in the rotary electric machine which concerns on Embodiment 8 of this invention from the axial direction. この発明の実施の形態９に係る回転電機における回転子のスロット周りを示す要部縦断面図である。It is a principal part longitudinal cross-sectional view which shows the slot periphery of the rotor in the rotary electric machine which concerns on Embodiment 9 of this invention. この発明の実施の形態９に係る回転電機における回転子の第５分割くさびを示す縦断面図である。It is a longitudinal cross-sectional view which shows the 5th division | segmentation wedge of the rotor in the rotary electric machine which concerns on Embodiment 9 of this invention. この発明の実施の形態９に係る回転電機における回転子の第５分割くさびを軸方向から見た端面図である。It is the end elevation which looked at the 5th division wedge of the rotor in the rotary electric machine concerning Embodiment 9 of this invention from the axial direction.
　以下、この発明の各実施の形態の回転電機について、図に基づいて説明するが、各図において、同一または相当部材、部位には同一符号を付して説明する。 Hereinafter, the rotating electric machine according to each embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts are denoted by the same reference numerals.
　実施の形態１．
　図１は、この発明の実施の形態１に係る回転電機を示す縦断面図、図２は、この発明の実施の形態１に係る回転電機における回転子を示す斜視図である。なお、縦断面図とは、回転軸の軸心を含む断面を示す断面図である。 Embodiment 1 FIG.
1 is a longitudinal sectional view showing a rotary electric machine according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing a rotor in the rotary electric machine according to Embodiment 1 of the present invention. In addition, a longitudinal cross-sectional view is a cross-sectional view showing a cross section including the axis of the rotation shaft.
　図１および図２において、回転電機１００は、フレーム１と、フレーム１に回転可能に支持された回転軸７、および回転軸７に固着されてフレーム１の内部に回転可能に設けられ、電磁石となる回転子コア８を有する回転子６と、フレーム１に保持されて、回転子コア８を取り囲み、かつ同軸に設けられた電機子コア４、および電機子コア４に保持されて、回転子コア８による磁束が鎖交して出力電流を発生する電機子巻線５を有する電機子３と、を備える。回転軸７は、原動機（図示せず）に接続されている。これにより、回転子コア８は、回転軸７を介して原動機の回転力が付与される。さらに、回転子コア８に装着された界磁巻線（図示せず）、電機子巻線５などでの発熱を抑えるための空気、または水素の冷媒を冷却するガスクーラー２が、フレーム１内に設けられている。 1 and 2, the rotating electrical machine 100 includes a frame 1, a rotating shaft 7 rotatably supported by the frame 1, and a rotating shaft 7 fixed to the rotating shaft 7 so as to be rotatable inside the frame 1, an electromagnet, The rotor 6 having the rotor core 8 and the armature core 4 which is held by the frame 1 and surrounds the rotor core 8 and is provided coaxially, and the armature core 4 is held by the rotor core. And an armature 3 having an armature winding 5 that generates an output current by interlinking the magnetic flux of 8. The rotating shaft 7 is connected to a prime mover (not shown). Thereby, the rotational force of the prime mover is applied to the rotor core 8 via the rotary shaft 7. Furthermore, a gas cooler 2 for cooling air or hydrogen refrigerant for suppressing heat generation in a field winding (not shown) mounted on the rotor core 8, the armature winding 5, etc. is provided inside the frame 1. Is provided.
　回転子コア８には、スロット１０が、それぞれ、溝方向を軸方向として回転子コア８の軸方向の一端から他端に至るように、かつ回転子コア８の外周面に開口するように、周方向に複数設けられている。界磁巻線が、図示されていないが、スロット１０内に設置されている。くさびが、スロット１０内に設置され、遠心力による界磁巻線などのスロット内容物の飛び出しを阻止している。スロット１０に設置されている界磁巻線を結合する構造（図示せず）が回転子コア８の軸方向両端部に設置されている。この界磁巻線を結合する構造の遠心力による変形を抑制するための金属製の保持環９が回転子コア８の軸方向両端部に設置されている。 In the rotor core 8, the slots 10 are respectively opened from one end to the other end in the axial direction of the rotor core 8 with the groove direction as an axial direction, and open to the outer peripheral surface of the rotor core 8. A plurality are provided in the circumferential direction. Although not shown, the field winding is installed in the slot 10. A wedge is installed in the slot 10 to prevent the slot contents such as field windings from popping out due to centrifugal force. A structure (not shown) for coupling field windings installed in the slot 10 is installed at both axial ends of the rotor core 8. Metal retaining rings 9 for suppressing deformation due to centrifugal force of the structure for coupling the field windings are provided at both axial ends of the rotor core 8.
　このように構成された回転電機１００は、回転軸７を介して原動機の回転力が回転子６に付与される。これにより、回転磁界が電機子巻線５に与えられ、起電力が電機子巻線５に発生する。このように、回転電機１００は発電機として動作する。 In the rotating electrical machine 100 configured in this way, the rotational force of the prime mover is applied to the rotor 6 through the rotating shaft 7. Thereby, a rotating magnetic field is applied to the armature winding 5, and an electromotive force is generated in the armature winding 5. Thus, the rotating electrical machine 100 operates as a generator.
　ここで、比較例の回転子構造を図３および図４を参照して説明する。図３は、比較例の回転電機における回転子のスロット周りを示す要部横断面図、図４は、比較例の回転電機における回転子のスロット周りを示す要部縦断面図である。なお、横断面図とは、回転軸の軸心に直交する断面を示す断面図である。 Here, the rotor structure of the comparative example will be described with reference to FIG. 3 and FIG. FIG. 3 is a cross-sectional view of the main part showing the periphery of the rotor slot in the rotating electrical machine of the comparative example, and FIG. The transverse cross-sectional view is a cross-sectional view showing a cross section orthogonal to the axis of the rotation axis.
　比較例の回転子においては、界磁巻線１１、絶縁物１２、ダンパーバー１３が、内径側からこの順番で、各スロット１０に設置されている。Ｕチャネル１４が、開口を径方向外方に向けて、各スロット１０の界磁巻線１１の内径側に設置され、軸方向通風路１５が構成されている。くさびが、各スロット１０のダンパーバー１３の外径側に設置され、界磁巻線１１、絶縁物１２、ダンパーバー１３の飛び出しを阻止している。ここで、くさびは、スロット１０の軸方向の中央部に設置される第１分割くさび１６、スロット１０の軸方向の両端部に設置される第２分割くさび１７と、スロット１０の第１分割くさび１６と第２分割くさび１７との間に設置される複数の第３分割くさび１８と、からなる。つまり、第１分割くさび１６、第２分割くさび１７、および複数の第３分割くさび１８は、各スロット１０の開口側に、軸方向に１列に配列して収納されている。半径方向通風路２０が、軸方向の複数位置で、第１分割くさび１６、第２分割くさび１７、第３分割くさび１８、ダンパーバー１３、絶縁物１２、界磁巻線１１を径方向に貫通するように形成され、軸方向通風路１５と外部とを連通している。 In the rotor of the comparative example, the field winding 11, the insulator 12, and the damper bar 13 are installed in each slot 10 in this order from the inner diameter side. The U channel 14 is installed on the inner diameter side of the field winding 11 of each slot 10 with the opening directed radially outward, and an axial ventilation path 15 is configured. A wedge is installed on the outer diameter side of the damper bar 13 of each slot 10 to prevent the field winding 11, the insulator 12 and the damper bar 13 from jumping out. Here, the wedges are a first divided wedge 16 installed at the center of the slot 10 in the axial direction, a second divided wedge 17 installed at both ends of the slot 10 in the axial direction, and a first divided wedge of the slot 10. 16 and a plurality of third divided wedges 18 installed between the second divided wedges 17. In other words, the first divided wedge 16, the second divided wedge 17, and the plurality of third divided wedges 18 are housed in a line in the axial direction on the opening side of each slot 10. The radial ventilation path 20 penetrates the first divided wedge 16, the second divided wedge 17, the third divided wedge 18, the damper bar 13, the insulator 12, and the field winding 11 in the radial direction at a plurality of positions in the axial direction. The axial direction air passage 15 and the outside communicate with each other.
　第１分割くさび１６は、軸方向の中央部で軸方向に分離して設置されているダンパーバー１３に接し、ダンパーバー１３間を電気的に短絡している。第２分割くさび１７は、ダンパーバー１３と保持環９とに接し、ダンパーバー１３と保持環９とを電気的に短絡している。これにより、電機子巻線５からの磁束により誘起されて、軸方向他側に設置されているダンパーバー１３を流れる渦電流が、図４中矢印１９で示されるように、第１分割くさび１６を通って、軸方向一側に設置されているダンパーバー１３に流れる。さらに、ダンパーバー１３を流れる渦電流が、第２分割くさび１７を通って保持環９に流れる。保持環９に流れた渦電流は、保持環９から他のスロット１０内に設置されている第２分割くさび１７を通ってダンパーバー１３に流れる。これにより、回転子内に保持環９を介した渦電流の経路が形成され、第１分割くさび１６および第２分割くさび１７を含めた回転子の渦電流による発熱が抑制される。このように、第１分割くさび１６と第２分割くさび１７には、高い導電性が求められることから、導電性の高い金属、例えばＢｅＣｕ合金で作製されている。第１分割くさび１６と第２分割くさび１７に必要な導電率は、導電率の基準ＩＡＣＳ（Ｉｎｔｅｒｎａｔｉｏｎａｌ　Ａｎｎｅａｌｅｄ　Ｃｏｐｐｅｒ　Ｓｔａｎｒａｅｄ）によれば２０％ＩＡＣＳである。一方、第３分割くさび１８には導電性が必要ないので、高強度の非磁性材、例えばステンレス鋼で作製される。第３分割くさび１８に必要な材料強度は、０．２％耐力により規定され、１９６ＭＰａ以上である。これにより、第３分割くさび１８は、電機子巻線５からの磁束により発熱することが抑制されている。 The first split wedge 16 is in contact with the damper bar 13 that is separated and installed in the axial direction at the central portion in the axial direction, and the damper bars 13 are electrically short-circuited. The second split wedge 17 is in contact with the damper bar 13 and the holding ring 9 and electrically shorts the damper bar 13 and the holding ring 9. As a result, the eddy current that is induced by the magnetic flux from the armature winding 5 and flows through the damper bar 13 installed on the other side in the axial direction, as shown by the arrow 19 in FIG. Flows through the damper bar 13 installed on one side in the axial direction. Further, the eddy current flowing through the damper bar 13 flows through the second split wedge 17 to the holding ring 9. The eddy current flowing in the holding ring 9 flows from the holding ring 9 to the damper bar 13 through the second split wedge 17 installed in the other slot 10. As a result, an eddy current path is formed in the rotor via the retaining ring 9, and heat generation due to the eddy current of the rotor including the first divided wedge 16 and the second divided wedge 17 is suppressed. As described above, since the first divided wedge 16 and the second divided wedge 17 are required to have high conductivity, the first divided wedge 16 and the second divided wedge 17 are made of a highly conductive metal, for example, a BeCu alloy. The conductivity required for the first divided wedge 16 and the second divided wedge 17 is 20% IACS according to the conductivity reference IACS (International Annealed Copper Standard). On the other hand, since the third divided wedge 18 does not need conductivity, it is made of a high-strength nonmagnetic material such as stainless steel. The material strength required for the third divided wedge 18 is defined by 0.2% proof stress and is 196 MPa or more. As a result, the third divided wedge 18 is suppressed from generating heat due to the magnetic flux from the armature winding 5.
　つぎに、実施の形態１による回転子構造を図５から図１０を参照して説明する。図５は、この発明の実施の形態１に係る回転電機における回転子のスロット周りを示す要部縦断面図、図６は、この発明の実施の形態１に係る回転電機における回転子の第１分割くさびを示す縦断面図、図７は、この発明の実施の形態１に係る回転電機における回転子の第１分割くさびを軸方向から見た端面図、図８は、この発明の実施の形態１に係る回転電機における回転子の第２分割くさびを示す縦断面図、図９は、この発明の実施の形態１に係る回転電機における回転子の第２分割くさびを軸方向他端側から見た端面図、図１０は、この発明の実施の形態１に係る回転電機における回転子の第２分割くさびを軸方向一端側から見た端面図、図１１は、この発明の実施の形態１に係る回転電機における回転子のスロット周りを示す要部分解斜視図、図１２は、この発明の実施の形態１に係る回転電機における回転子の第１分割クサビを示す分解斜視図、図１３は、この発明の実施の形態１に係る回転電機における回転子の第２分割クサビを示す分解斜視図である。 Next, the rotor structure according to the first embodiment will be described with reference to FIGS. FIG. 5 is a longitudinal sectional view of a main part showing the periphery of the slot of the rotor in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. FIG. 7 is a longitudinal sectional view showing the divided wedge, FIG. 7 is an end view of the first divided wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention as viewed from the axial direction, and FIG. 8 is an embodiment of the present invention. FIG. 9 is a longitudinal sectional view showing a second divided wedge of the rotor in the rotating electrical machine according to FIG. 1, and FIG. FIG. 10 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention as viewed from one end in the axial direction, and FIG. 11 is Embodiment 1 of the present invention. The principal part which shows the slot periphery of the rotor in the rotary electric machine which concerns FIG. 12 is an exploded perspective view showing a first split wedge of the rotor in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 13 is a rotor in the rotary electric machine according to Embodiment 1 of the present invention. It is a disassembled perspective view which shows the 2nd division | segmentation wedge.
　実施の形態１による回転子６は、図５および図１２に示されるように、第１分割くさび３０が第１分割くさび１６に替えてスロット１０の軸方向中央部に設置され、第２分割くさび３５が第２分割くさび１７に替えてスロット１０の軸方向両端部に設置されている点を除いて、比較例の回転子と同様に構成されている。実施の形態１では、くさびは、第１分割くさび３０、第２分割くさび３５、および第３分割くさび１８に分割構成されている。 As shown in FIGS. 5 and 12, the rotor 6 according to the first embodiment includes a first divided wedge 30 that is installed in the center in the axial direction of the slot 10 instead of the first divided wedge 16, and the second divided wedge. 35 is configured in the same manner as the rotor of the comparative example, except that 35 is installed at both axial ends of the slot 10 instead of the second divided wedge 17. In the first embodiment, the wedge is divided into a first divided wedge 30, a second divided wedge 35, and a third divided wedge 18.
　第１分割くさび３０は、図６、図７および図１３に示されるように、第１分割上くさび３１と、第１分割下くさび３２と、導電性金属板３３と、を備える複合くさびである。第１分割下くさび３２は、溝方向を軸方向とする凹部３２ａが上面中央部に形成された略直方体に作製されている。導電性金属板３３は、矩形平板状に作製され、凹部３２ａに配置され、第１分割下くさび３２から軸方向両側への突出部を折り返して、第１分割下くさび３２の軸方向の両端面に沿って延びて第１分割下くさび３２の下面に沿うように配置される。このとき、第１分割下くさび３２の軸方向の両端面の導電性金属板３３の載置領域が凹部に形成されており、第１分割下くさび３２の軸方向の両端面と導電性金属板３３は面一となっている。同様に、第１分割下くさび３２の下面の導電性金属板３３の載置領域が凹部に形成されており、第１分割下くさび３２の下面と導電性金属板３３は面一となっている。第１分割上くさび３１は、下面中央部に凹部３２ａと嵌合可能な凸部３１ａを有している。 As shown in FIGS. 6, 7, and 13, the first divided wedge 30 is a composite wedge including a first divided upper wedge 31, a first divided lower wedge 32, and a conductive metal plate 33. . The first divided lower wedge 32 is formed in a substantially rectangular parallelepiped shape in which a concave portion 32a having the groove direction as an axial direction is formed at the center of the upper surface. The conductive metal plate 33 is formed in a rectangular flat plate shape, is disposed in the recess 32a, and folds the protruding portions from the first divided lower wedge 32 to both sides in the axial direction so that both end surfaces in the axial direction of the first divided lower wedge 32 are formed. Extending along the lower surface of the first divided lower wedge 32. At this time, the mounting regions of the conductive metal plates 33 on both end surfaces in the axial direction of the first divided lower wedge 32 are formed in the recesses, and both end surfaces in the axial direction of the first divided lower wedge 32 and the conductive metal plates are formed. 33 is flush. Similarly, the mounting area of the conductive metal plate 33 on the lower surface of the first divided lower wedge 32 is formed in the recess, and the lower surface of the first divided lower wedge 32 and the conductive metal plate 33 are flush with each other. . The 1st division | segmentation upper wedge 31 has the convex part 31a which can be fitted with the recessed part 32a in the lower surface center part.
　第１分割くさび３０は、凸部３１ａを凹部３２ａに嵌着して、導電性金属板３３が第１分割上くさび３１と第１分割下くさび３２との間に挟まれて保持された状態で、第１分割上くさび３１と第１分割下くさび３２とを一体化して構成される。このとき、第１分割上くさび３１と第１分割下くさび３２は、軸方向の両端面が面一となっている。ここで、一体化された第１分割上くさび３１と第１分割下くさび３２とが本体部となり、導電性金属板３３が通電体となる。 In the first divided wedge 30, the convex portion 31 a is fitted into the concave portion 32 a, and the conductive metal plate 33 is sandwiched and held between the first divided upper wedge 31 and the first divided lower wedge 32. The first divided upper wedge 31 and the first divided lower wedge 32 are integrated. At this time, the first divided upper wedge 31 and the first divided lower wedge 32 have the same axial end surfaces. Here, the integrated first divided upper wedge 31 and the first divided lower wedge 32 serve as a main body portion, and the conductive metal plate 33 serves as a current-carrying body.
　第１分割くさび３０においても、第１分割上くさび３１、第１分割下くさび３２および導電性金属板３３に、半径方向通風路２０が形成されている。第１分割上くさび３１および第１分割下くさび３２は、高強度の非磁性材、例えばステンレス鋼で作製されている。導電性金属板３３は、比較例における第１分割くさび１６および第２分割くさび１７と同等以上の導電性を有する材料、例えば銅又は銅合金で作製される。このように、第１分割上くさび３１および第１分割下くさび３２は、導電性金属板３３より高強度の非磁性材で作製される。一方、導電性金属板３３は、第１分割上くさび３１および第１分割下くさび３２より高伝導性の金属で作製される。 Also in the first divided wedge 30, the radial ventilation path 20 is formed in the first divided upper wedge 31, the first divided lower wedge 32, and the conductive metal plate 33. The first divided upper wedge 31 and the first divided lower wedge 32 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 33 is made of a material having conductivity equal to or higher than that of the first divided wedge 16 and the second divided wedge 17 in the comparative example, for example, copper or a copper alloy. Thus, the first divided upper wedge 31 and the first divided lower wedge 32 are made of a nonmagnetic material having a higher strength than the conductive metal plate 33. On the other hand, the conductive metal plate 33 is made of a metal having higher conductivity than the first divided upper wedge 31 and the first divided lower wedge 32.
　第２分割くさび３５は、図８から図１０および図１４に示されるように、第２分割上くさび３６と、第２分割下くさび３７と、第１導電性金属板３８ａと、第２導電性金属板３８ｂと、を備える複合くさびである。第２分割下くさび３７は、第２分割上くさび３６より軸方向長さが長い略直方体に作製され、溝方向を軸方向とする凹部３７ａが上面中央部に形成されている。第１導電性金属板３８ａは、矩形平板状に作製され、凹部３７ａに配置され、第２分割下くさび３７から軸方向両側への突出部を折り返して、第２分割下くさび３７の軸方向の両端面に沿って延びて第２分割下くさび３７の下面に沿うように配置される。このとき、第２分割下くさび３７の軸方向の両端面の第１導電性金属板３８ａの載置領域が凹部に形成されており、第２分割下くさび３７の軸方向の両端面と第１導電性金属板３８ａは面一となっている。同様に、第２分割下くさび３７の下面の第１導電性金属板３８ａの載置領域が凹部に形成されており、第２分割下くさび３７の下面と第１導電性金属板３８ａは面一となっている。 As shown in FIGS. 8 to 10 and 14, the second divided wedge 35 includes a second divided upper wedge 36, a second divided lower wedge 37, a first conductive metal plate 38 a, and a second conductive property. And a metal wedge 38b. The second divided lower wedge 37 is formed in a substantially rectangular parallelepiped having an axial length longer than that of the second divided upper wedge 36, and a concave portion 37a having the groove direction in the axial direction is formed at the center of the upper surface. The first conductive metal plate 38a is formed in a rectangular flat plate shape, and is disposed in the recess 37a. The first conductive metal plate 38a is bent in the axial direction of the second divided lower wedge 37 by folding back the protruding portions from the second divided lower wedge 37 to both sides in the axial direction. It extends along both end surfaces and is arranged along the lower surface of the second divided lower wedge 37. At this time, the mounting regions of the first conductive metal plates 38a on both end faces in the axial direction of the second divided lower wedge 37 are formed in the recesses, and both the end faces in the axial direction of the second divided lower wedge 37 and the first end faces The conductive metal plate 38a is flush. Similarly, the mounting area of the first conductive metal plate 38a on the lower surface of the second divided lower wedge 37 is formed in the recess, and the lower surface of the second divided lower wedge 37 and the first conductive metal plate 38a are flush with each other. It has become.
　第２分割上くさび３６は、下面中央部に凹部３７ａと嵌合可能な凸部３６ａを有している。第２導電性金属板３８ｂは、矩形平板状に作製され、凸部３６ａに配置され、第２分割上くさび３６から軸方向一端側への突出部を折り返して、第２分割上くさび３６の軸方向の一端面に沿うように配置される。このとき、第２分割上くさび３６の軸方向の一端面の第２導電性金属板３８ｂの載置領域が凹部に形成されており、第２分割上くさび３６の軸方向の一端面と第２導電性金属板３８ｂは面一となっている。そして、第２分割くさび３５は、凸部３６ａを凹部３７ａに嵌着して、第１導電性金属板３８ａおよび第２導電性金属板３８ｂが第２分割上くさび３６と第２分割下くさび３７との間に挟まれて保持された状態で、第２分割上くさび３６と第２分割下くさび３７とを一体化して構成される。このとき、第２分割下くさび３７は、第２分割上くさび３６から軸方向一端側に突出し、第２分割上くさび３６と第２分割下くさび３７の軸方向の他端面は、面一となっている。ここで、一体化された第２分割上くさび３６と第２分割下くさび３７とが本体部となり、第１導電性金属板３８ａおよび第２導電性金属板３８ｂが通電体となる。 The second divided upper wedge 36 has a convex portion 36a that can be fitted to the concave portion 37a at the center of the lower surface. The second conductive metal plate 38b is formed in a rectangular flat plate shape and is disposed on the convex portion 36a. The second conductive upper metal plate 38b is folded back from the second divided upper wedge 36 toward the one end side in the axial direction, so that the axis of the second divided upper wedge 36 is obtained. It arrange | positions along the one end surface of a direction. At this time, the mounting region of the second conductive metal plate 38b on the one end surface in the axial direction of the second divided upper wedge 36 is formed in the concave portion, and the one end surface in the axial direction of the second divided upper wedge 36 and the second The conductive metal plate 38b is flush. The second divided wedge 35 has the convex portion 36a fitted into the concave portion 37a, and the first conductive metal plate 38a and the second conductive metal plate 38b are divided into the second divided upper wedge 36 and the second divided lower wedge 37. The second divided upper wedge 36 and the second divided lower wedge 37 are integrated with each other while being held between the two. At this time, the second divided lower wedge 37 protrudes from the second divided upper wedge 36 to one axial end side, and the other axial end surfaces of the second divided upper wedge 36 and the second divided lower wedge 37 are flush with each other. ing. Here, the integrated second divided upper wedge 36 and second divided lower wedge 37 serve as a main body portion, and the first conductive metal plate 38a and the second conductive metal plate 38b serve as a current-carrying body.
　第２分割くさび３５においても、第２分割上くさび３６、第２分割下くさび３７、第１導電性金属板３８ａおよび第２導電性金属板３８ｂに、半径方向通風路２０が形成されている。第２分割上くさび３６および第２分割下くさび３７は、高強度の非磁性材、例えばステンレス鋼で作製されている。第１導電性金属板３８ａおよび第２導電性金属板３８ｂは、導電性金属板３３と同じ材料で作製される。このように、第２分割上くさび３６および第２分割下くさび３７は、第１導電性金属板３８ａおよび第２導電性金属板３８ｂより高強度の非磁性材で作製される。一方、第１導電性金属板３８ａおよび第２導電性金属板３８ｂは、第２分割上くさび３６および第２分割下くさび３７より高伝導性の金属で作製される。 Also in the second divided wedge 35, the radial ventilation path 20 is formed in the second divided upper wedge 36, the second divided lower wedge 37, the first conductive metal plate 38a, and the second conductive metal plate 38b. The second divided upper wedge 36 and the second divided lower wedge 37 are made of a high-strength nonmagnetic material such as stainless steel. The first conductive metal plate 38 a and the second conductive metal plate 38 b are made of the same material as the conductive metal plate 33. As described above, the second divided upper wedge 36 and the second divided lower wedge 37 are made of a nonmagnetic material having higher strength than the first conductive metal plate 38a and the second conductive metal plate 38b. On the other hand, the first conductive metal plate 38 a and the second conductive metal plate 38 b are made of a metal having higher conductivity than the second divided upper wedge 36 and the second divided lower wedge 37.
　なお、第１導電性金属板３８ａと第２導電性金属板３８ｂとの２枚の金属板を用いているが、１枚の金属板を用い、第２分割くさび３５から軸方向一端側への突出部を分割して上下に折り返してもよい。ここでは、スロット１０の軸方向一端部に設置される第２分割くさび３５について説明しているが、スロット１０の軸方向他端部では、第２分割くさび３５は、第２分割下くさび３７が第２分割上くさび３６から軸方向他端側に突出するように設置されている。 In addition, although the two metal plates of the first conductive metal plate 38a and the second conductive metal plate 38b are used, one metal plate is used, and the second divided wedge 35 extends to one end side in the axial direction. The protruding portion may be divided and folded up and down. Here, the second split wedge 35 installed at one end in the axial direction of the slot 10 has been described. However, at the other end in the axial direction of the slot 10, the second split wedge 35 has a second split lower wedge 37. It is installed so as to protrude from the second divided upper wedge 36 to the other axial end side.
　第１分割くさび３０を第１分割上くさび３１と第１分割下くさび３２とに分割する箇所は、回転子６が回転時に遠心力を受ける際に圧縮の荷重となる箇所とすることが好ましい。第１分割上くさび３１と第１分割下くさび３２とは、焼嵌め、冷やし嵌め、接着、溶接、ロウ付け、撹拌接合のいずれかの方法を用いて一体化される。なお、第２分割くさび３５においても、第１分割くさび３０と同様である。これにより、スロット１０に第１分割くさび３０および第２分割くさび３５を分離することなく挿入でき、組み立て作業性が高められる。 It is preferable that the portion where the first divided wedge 30 is divided into the first divided upper wedge 31 and the first divided lower wedge 32 is a portion that becomes a compression load when the rotor 6 receives centrifugal force during rotation. The first divided upper wedge 31 and the first divided lower wedge 32 are integrated using any one of shrink fitting, cold fitting, adhesion, welding, brazing, and stir welding. The second divided wedge 35 is the same as the first divided wedge 30. Thereby, the 1st division | segmentation wedge 30 and the 2nd division | segmentation wedge 35 can be inserted in the slot 10, without isolate | separating, and assembly workability | operativity is improved.
　また、第１分割くさび３０および第２分割くさび３５は、接着、 溶接、ロウ付けおよび撹拌接合のいずれかと、焼嵌めおよび冷やし嵌めのいずれかと、を併用して一体化してもよい。これにより、焼嵌めまたは冷やし嵌めによる結合部が外れるような温度分布が第１分割くさび３０および第２分割くさび３５に発生しても、接着、 溶接、ロウ付けおよび撹拌接合のいずれかによる接合部が維持される。その結果、第１分割くさび３０および第２分割くさび３５の接合部が外れることに起因する、導電性金属とくさびとの摩耗による金属粉の発生を抑制できる。 Further, the first divided wedge 30 and the second divided wedge 35 may be integrated by using any one of adhesion, brazing welding, brazing, and stir welding together with either shrink fitting or cold fitting. As a result, even if a temperature distribution is generated in the first divided wedge 30 and the second divided wedge 35 so that the joint portion due to shrink fitting or cold fitting is disengaged, the bonded portion by any one of adhesion, brazing welding, brazing and stir welding Is maintained. As a result, it is possible to suppress the generation of metal powder due to wear of the conductive metal and the wedge due to the disengagement of the joint portion between the first divided wedge 30 and the second divided wedge 35.
　このように構成された回転子６においては、第１分割くさび３０の本体部からの導電性金属板３３の突出部が、軸方向中央部で軸方向に分離して設置されているダンパーバー１３に接し、ダンパーバー１３間を電気的に短絡している。第２分割くさび３５の本体部からの第１導電性金属板３８ａと第２導電性金属板３８ｂとの突出部が、ダンパーバー１３と保持環９とに接し、ダンパーバー１３と保持環９とを電気的に短絡している。このとき、第１分割くさび３０の第１分割下くさび３２の下面と導電性金属板３３とが面一となっているので、導電性金属板３３とダンパーバー１３とが面接触し、両者の電気的接続が確実に確保される。第２分割くさび３５の第２分割下くさび３７の下面と第１導電性金属板３８ａとが面一となっているので、第１導電性金属板３８ａとダンパーバー１３とが面接触し、両者の電気的接続が確実に確保される。第２分割下くさび３７の第２分割上くさび３６から軸方向一端側への突出部の上面と第１導電性金属板３８ａとが面一となっているので、第１導電性金属板３８ａと保持環９の内周面とが面接触し、両者の電気的接続が確実に確保される。第２分割上くさび３６の軸方向一端面と第２導電性金属板３８ｂとが面一となっているので、第２導電性金属板３８ｂと保持環９の軸方向他端面とが面接触し、両者の電気的接続が確実に確保される。さらに、第１導電性金属板３８ａと第２導電性金属板３８ｂの保持環９との接触面積が増大し、接触抵抗が低減される。 In the rotor 6 configured as described above, the damper bar 13 in which the protruding portion of the conductive metal plate 33 from the main body portion of the first split wedge 30 is separated in the axial direction at the central portion in the axial direction. The damper bars 13 are electrically short-circuited. The protruding portions of the first conductive metal plate 38a and the second conductive metal plate 38b from the main body of the second divided wedge 35 are in contact with the damper bar 13 and the holding ring 9, and the damper bar 13 and the holding ring 9 Are electrically short-circuited. At this time, since the lower surface of the first divided lower wedge 32 of the first divided wedge 30 and the conductive metal plate 33 are flush with each other, the conductive metal plate 33 and the damper bar 13 are in surface contact with each other. An electrical connection is reliably ensured. Since the lower surface of the second divided lower wedge 37 of the second divided wedge 35 and the first conductive metal plate 38a are flush with each other, the first conductive metal plate 38a and the damper bar 13 are in surface contact with each other. The electrical connection is ensured. Since the upper surface of the projecting portion of the second divided lower wedge 37 from the second divided upper wedge 36 to the one end side in the axial direction is flush with the first conductive metal plate 38a, the first conductive metal plate 38a The inner peripheral surface of the holding ring 9 comes into surface contact, and electrical connection between the two is ensured reliably. Since one end surface in the axial direction of the second divided upper wedge 36 and the second conductive metal plate 38b are flush with each other, the second conductive metal plate 38b and the other axial end surface of the holding ring 9 are in surface contact. The electrical connection between the two is ensured. Further, the contact area between the first conductive metal plate 38a and the holding ring 9 of the second conductive metal plate 38b increases, and the contact resistance is reduced.
　比較例の回転子においては、ダンパーバー１３に流れる渦電流を第１分割くさび１６および第２分割くさび１７に流しているので、第１分割くさび１６および第２分割くさび１７をＢｅＣｕ合金などの高い導電性の材料で作製されていた。しかし、高い導電性と高強度の両立は困難であり、第１分割くさび１６および第２分割くさび１７の厚さを厚くして、スロット内容物の飛散防止機能を確保していた。これにより、界磁巻線１１と電機子巻線５との間の距離が長くなり、界磁巻線１１から生じる磁束の電機子巻線５に交差する量が少なくなってしまう。 In the rotor of the comparative example, since the eddy current flowing through the damper bar 13 flows through the first divided wedge 16 and the second divided wedge 17, the first divided wedge 16 and the second divided wedge 17 are made of a high CuCu alloy or the like. It was made of a conductive material. However, it is difficult to achieve both high conductivity and high strength, and the thickness of the first divided wedge 16 and the second divided wedge 17 is increased to ensure the function of preventing the slot contents from scattering. As a result, the distance between the field winding 11 and the armature winding 5 increases, and the amount of magnetic flux generated from the field winding 11 intersecting the armature winding 5 decreases.
　実施の形態１では、第１分割くさび３０は、第１分割上くさび３１と、第１分割下くさび３２と、導電性金属板３３と、を備えた複合くさびである。導電性金属板３３は、第１分割上くさび３１および第１分割下くさび３２より高導電性の金属で作製されている。導電性金属板３３が導電性の機能を担っているので、導電性金属板３３を保持する第１分割上くさび３１と第１分割下くさび３２とには、高い導電性が不要となる。第２分割くさび３５においても、同様である。そこで、第１分割上くさび３１、第１分割下くさび３２、第２分割上くさび３６および第２分割下くさび３７に求められる特性を強度に特化できる。これにより、第１分割上くさび３１、第１分割下くさび３２、第２分割上くさび３６および第２分割下くさび３７を、導電性金属板３３、第１導電性金属板３８ａおよび第２導電性金属板３８ｂよりも高強度の材料で作製することができる。そこで、第１分割上くさび３１、第１分割下くさび３２、第２分割上くさび３６および第２分割下くさび３７の材料として、第１分割くさび１６および第２分割くさび１７の材料として用いられているＢｅＣｕ合金よりも高強度な非磁性材、例えばステンレス鋼を用いることができる。その結果、第１分割くさび３０および第２分割くさび３５の厚さを薄くすることができる。これにより、スロット内容物の飛散を防止できるとともに、スロット１０内の界磁巻線１１を回転子コア８の外周部に設置できる。そこで、界磁巻線１１と電機子巻線５との間の距離が短くなり、界磁巻線１１から生じる磁束がより多く電機子巻線５に鎖交するので、設定された出力電流を得るために界磁巻線１１に通電される界磁電流を削減できる。その結果、界磁銅損が削減され、効率が向上される。また、導電性金属板３３、第１導電性金属板３８ａおよび第２導電性金属板３８ｂが、第１分割上くさび３１、第１分割下くさび３２、第２分割上くさび３６および第２分割下くさび３７より高い導電性の材料、例えば銅、銅合金などで作製されているので、第１分割くさび３０および第２分割くさび３５での発熱が抑制され、渦電流損の低減が図られる。 In the first embodiment, the first divided wedge 30 is a composite wedge including a first divided upper wedge 31, a first divided lower wedge 32, and a conductive metal plate 33. The conductive metal plate 33 is made of a metal having higher conductivity than the first divided upper wedge 31 and the first divided lower wedge 32. Since the conductive metal plate 33 has a conductive function, the first divided upper wedge 31 and the first divided lower wedge 32 that hold the conductive metal plate 33 do not require high conductivity. The same applies to the second divided wedge 35. Therefore, the characteristics required for the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36, and the second divided lower wedge 37 can be specialized in strength. Thus, the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 are replaced with the conductive metal plate 33, the first conductive metal plate 38a and the second conductive. It can be made of a material stronger than the metal plate 38b. Therefore, the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36 and the second divided lower wedge 37 are used as materials for the first divided wedge 16 and the second divided wedge 17. A nonmagnetic material having a higher strength than the BeCu alloy, such as stainless steel, can be used. As a result, the thickness of the first divided wedge 30 and the second divided wedge 35 can be reduced. Thereby, scattering of the contents of the slot can be prevented, and the field winding 11 in the slot 10 can be installed on the outer peripheral portion of the rotor core 8. Therefore, the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5. Therefore, the field current supplied to the field winding 11 can be reduced. As a result, field copper loss is reduced and efficiency is improved. The conductive metal plate 33, the first conductive metal plate 38a, and the second conductive metal plate 38b are divided into a first divided upper wedge 31, a first divided lower wedge 32, a second divided upper wedge 36, and a second divided lower plate. Since it is made of a conductive material higher than the wedge 37, such as copper or copper alloy, heat generation in the first divided wedge 30 and the second divided wedge 35 is suppressed, and eddy current loss can be reduced.
　第１分割くさび３０がスロット１０の軸方向中央部に収納され、第２分割くさび３５がスロット１０の軸方向両端部に収納されている。そこで、電機子巻線５からの磁束により誘起されて、軸方向他側に設置されているダンパーバー１３を流れる渦電流が、図５中矢印１９で示されるように、第１分割くさび３０の導電性金属板３３を通って、軸方向一側に設置されているダンパーバー１３に流れる。さらに、ダンパーバー１３を流れる渦電流が、第２分割くさび３５の第１導電性金属板３８ａと第２導電性金属板３８ｂを通って保持環９に流れる。保持環９に流れた渦電流は、保持環９から他のスロット１０内に設置されている第２分割くさび３５の第１導電性金属板３８ａと第２導電性金属板３８ｂを通ってダンパーバー１３に流れる。 The first divided wedge 30 is housed in the central portion of the slot 10 in the axial direction, and the second divided wedges 35 are housed in both axial end portions of the slot 10. Therefore, an eddy current that is induced by the magnetic flux from the armature winding 5 and flows through the damper bar 13 installed on the other side in the axial direction is indicated by an arrow 19 in FIG. It flows through the conductive metal plate 33 to the damper bar 13 installed on one side in the axial direction. Further, the eddy current flowing through the damper bar 13 flows to the holding ring 9 through the first conductive metal plate 38a and the second conductive metal plate 38b of the second split wedge 35. The eddy current flowing in the holding ring 9 passes through the first conductive metal plate 38a and the second conductive metal plate 38b of the second split wedge 35 installed in the other slot 10 from the holding ring 9, and the damper bar. 13 flows.
　第１分割クサビ３０が軸方向中央部に収納されているので、軸方向中央部でのダンパーバー１３間の導通が第１分割クサビ３０の導電性金属板３３により維持される。第２分割くさび３５が軸方向両端部に収納されているので、軸方向両端部でのダンパーバー１３と保持環９との導通が第２分割クサビ３５の第１導電性金属板３８ａ第２導電性金属板３８ｂにより維持される。そのうえで、第１分割上くさび３１および第１分割下くさび３２が導電性金属板３３より高強度の非磁性体で作製されている。同様に、第２分割上くさび３６および第２分割下くさび３７が第１導電性金属板３８ａおよび第２導電性金属板３８ｂより高強度の非磁性体で作製されている。そこで、第１分割上くさび３１、第１分割下くさび３２、第２分割上くさび３６および第２分割下くさび３７の厚みを薄くしても、スロット内容物の飛散を防止できる。それにより、スロット１０内での界磁巻線１１の位置が電機子巻線５に近づき、界磁電流の削減を可能にして、効率を向上させることができる。 Since the first divided wedge 30 is housed in the axially central portion, the conduction between the damper bars 13 in the axially central portion is maintained by the conductive metal plate 33 of the first divided wedge 30. Since the second split wedge 35 is housed at both axial ends, the conduction between the damper bar 13 and the retaining ring 9 at both axial ends is the first conductive metal plate 38a of the second split wedge 35 and the second conductive. Maintained by the conductive metal plate 38b. In addition, the first divided upper wedge 31 and the first divided lower wedge 32 are made of a nonmagnetic material having higher strength than the conductive metal plate 33. Similarly, the second divided upper wedge 36 and the second divided lower wedge 37 are made of a nonmagnetic material having higher strength than the first conductive metal plate 38a and the second conductive metal plate 38b. Therefore, even if the thickness of the first divided upper wedge 31, the first divided lower wedge 32, the second divided upper wedge 36, and the second divided lower wedge 37 is reduced, the scattering of the slot contents can be prevented. As a result, the position of the field winding 11 in the slot 10 approaches the armature winding 5 and the field current can be reduced, thereby improving the efficiency.
　第１分割くさび３０は、導電性金属板３３が第１分割上くさび３１と第１分割下くさび３２との間に挟まれて保持された状態で、第１分割上くさび３１と第１分割下くさび３２とを一体化して構成されている。そこで、回転子６の回転時に、遠心力が第１分割下くさび３２を介して導電性金属板３３を第１分割上くさび３１に押し付けるように作用する。これにより、導電性金属板３３が第１分割くさび３０から外れるような事態の発生が抑制される。第２分割くさび３５においても、同様である。 The first divided wedge 30 is a state in which the conductive metal plate 33 is sandwiched and held between the first divided upper wedge 31 and the first divided lower wedge 32, and the first divided upper wedge 31 and the first divided lower wedge 30. The wedge 32 is integrated. Therefore, when the rotor 6 rotates, the centrifugal force acts to press the conductive metal plate 33 against the first divided upper wedge 31 via the first divided lower wedge 32. As a result, the occurrence of a situation where the conductive metal plate 33 is detached from the first divided wedge 30 is suppressed. The same applies to the second divided wedge 35.
　なお、上記実施の形態１では、軸方向通風路１５がスロット１０の底部にのみ設けられているが、図１４および図１５に示されるように、軸方向通風路２１の半径方向位置を変えて界磁巻線１１に複数形成してもよい。この場合、図１５に示されるように、回転子コア８の軸方向中央部で、半径方向通風路２０を、第１分割くさび３０、ダンパーバー１３、絶縁物１２および界磁巻線１１に形成し、複数の軸方向通風路２１と外部とを連通するようにする。このとき、半径方向通風路２０は、第２分割くさび３５および第３分割くさび１８に必ずしも形成する必要はない。このように、実施の形態１による回転子は、半径方向通風形式、軸方向通風形式のどちらの回転電機にも適用できる。なお、他の実施の形態による回転子も、半径方向通風形式、軸方向通風形式のどちらの回転電機にも適用できる。 In the first embodiment, the axial ventilation path 15 is provided only at the bottom of the slot 10, but the radial position of the axial ventilation path 21 is changed as shown in FIGS. A plurality of field windings 11 may be formed. In this case, as shown in FIG. 15, the radial ventilation path 20 is formed in the first split wedge 30, the damper bar 13, the insulator 12, and the field winding 11 at the axial center of the rotor core 8. Then, the plurality of axial ventilation passages 21 are communicated with the outside. At this time, the radial ventilation path 20 is not necessarily formed in the second divided wedge 35 and the third divided wedge 18. Thus, the rotor according to the first embodiment can be applied to both the radial direction ventilation type and the axial direction ventilation type rotating electrical machines. Note that the rotor according to the other embodiments can be applied to both the radial-direction ventilation type and the axial-direction ventilation type rotating electrical machines.
　また、上記実施の形態１において、導電性金属板３３、第１導電性金属板３８ａ、および第２導電性金属板３８ｂのダンパーバー１３又は保持環９との接触面に、導電性金属板３３、第１導電性金属板３８ａおよび第２導電性金属板３８ｂよりも高い導電性の金属、例えば金、銀などのメッキを施し、接触抵抗を低減してもよい。なお、他の実施の形態においても、導電性金属板の、ダンパーバーなどの他の部材との電気的接触面に、金、銀などの高い導電性の金属メッキを施してもよい。 In the first embodiment, the conductive metal plate 33 is formed on the contact surface of the conductive metal plate 33, the first conductive metal plate 38 a, and the second conductive metal plate 38 b with the damper bar 13 or the holding ring 9. The contact resistance may be reduced by plating with a conductive metal that is higher than the first conductive metal plate 38a and the second conductive metal plate 38b, such as gold or silver. In other embodiments, the conductive metal plate may be subjected to highly conductive metal plating such as gold and silver on the electrical contact surface with other members such as a damper bar.
　また、上記実施の形態１では、第１分割くさび３０および第２分割くさび３５が、それぞれ、焼嵌め、冷やし嵌め、接着、溶接、ロウ付け、撹拌接合のいずれか１つの方法で、または接着と、溶接、ロウ付けおよび撹拌接合のいずれかと、を併用して、それぞれ一体化している。他の実施の形態においても、第１分割くさびおよび第２分割くさびは、同様に、それぞれ、焼嵌め、冷やし嵌め、接着、溶接、ロウ付け、撹拌接合のいずれか１つの方法、または接着と、溶接、ロウ付けおよび撹拌接合のいずれかと、を併用して、それぞれ一体化される。 In the first embodiment, each of the first divided wedge 30 and the second divided wedge 35 is either one of shrink fitting, cold fitting, adhesion, welding, brazing, stirring joining, or bonding. , Welding, brazing, and stir welding are used in combination. In other embodiments, the first split wedge and the second split wedge are each similarly shrink-fitted, cold-fitted, bonded, welded, brazed, stir welded, or bonded, respectively, Any one of welding, brazing and stir welding is used in combination.
　また、上記実施の形態１では、第１分割くさび３０および第２分割くさび３５を上下に分割する箇所は、回転子の回転時に遠心力を受ける際に圧縮の荷重となる箇所としているが、他の実施の形態においても、第１分割くさびおよび第２分割くさびを上下に分割する箇所は、回転子の回転時に遠心力を受ける際に圧縮の荷重となる箇所とすることが望ましい。 In the first embodiment, the first divided wedge 30 and the second divided wedge 35 are divided into upper and lower portions that are compressed loads when receiving centrifugal force during rotation of the rotor. Also in this embodiment, it is desirable that the first divided wedge and the second divided wedge are divided into portions where the compression load is applied when the centrifugal force is applied during rotation of the rotor.
　実施の形態２．
　図１６は、この発明の実施の形態２に係る回転電機における回転子のスロット周りを示す要部縦断面図、図１７は、この発明の実施の形態２に係る回転電機における回転子の第１分割くさびを示す縦断面図、図１８は、この発明の実施の形態２に係る回転電機における回転子の第１分割くさびを軸方向から見た端面図、図１９は、この発明の実施の形態２に係る回転電機における回転子の第２分割くさびを示す縦断面図、図２０は、この発明の実施の形態２に係る回転電機における回転子の第２分割くさびを軸方向他端側から見た端面図、図２１は、この発明の実施の形態２に係る回転電機における回転子の第２分割くさびを軸方向一端側から見た端面図である。 Embodiment 2. FIG.
FIG. 16 is a longitudinal sectional view of a main part showing the periphery of the slot of the rotor in the rotary electric machine according to Embodiment 2 of the present invention, and FIG. 17 is a first view of the rotor in the rotary electric machine according to Embodiment 2 of the present invention. FIG. 18 is a longitudinal sectional view showing the divided wedge, FIG. 18 is an end view of the first divided wedge of the rotor in the rotary electric machine according to Embodiment 2 of the present invention viewed from the axial direction, and FIG. 19 is an embodiment of the present invention. FIG. 20 is a longitudinal sectional view showing a second divided wedge of the rotor in the rotating electric machine according to FIG. 2, and FIG. 20 is a view of the second divided wedge of the rotor in the rotating electric machine according to Embodiment 2 of the present invention when viewed from the other axial end side. FIG. 21 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 2 of the present invention as viewed from one end side in the axial direction.
　実施の形態２では、図１６に示されるように、第１分割くさび４０が第１分割くさび３０に替えてスロット１０の軸方向中央部に設置され、第２分割くさび４５が第２分割くさび３５に替えてスロット１０の軸方向両端部に設置されている点を除いて、実施の形態１と同様に構成されている。実施の形態２では、くさびは、第１分割くさび４０、第２分割くさび４５、および第３分割くさび１８に分割構成されている。 In the second embodiment, as shown in FIG. 16, the first divided wedge 40 is installed in the axial center of the slot 10 instead of the first divided wedge 30, and the second divided wedge 45 is the second divided wedge 35. The configuration is the same as that of the first embodiment except that it is installed at both ends in the axial direction of the slot 10 instead. In the second embodiment, the wedge is divided into a first divided wedge 40, a second divided wedge 45, and a third divided wedge 18.
　第１分割くさび４０は、図１７および図１８に示されるように、第１分割上くさび４１と、第１分割下くさび４２と、導電性金属板４３と、を備える複合くさびである。第１分割下くさび４２は、軸方向の延びる凸部４２ａが上面中央部に形成された略直方体に作製されている。導電性金属板４３は、矩形平板状に作製され、凸部４２ａに配置され、第１分割下くさび４２から軸方向両側への突出部を折り返して、第１分割下くさび４２の軸方向の両端面に沿って延びて第１分割下くさび４２の下面に沿うように配置される。このとき、第１分割下くさび４２の軸方向の両端面の導電性金属板４３の載置領域が凹部に形成されており、第１分割下くさび４２の軸方向の両端面と導電性金属板４３は面一となっている。同様に、第１分割下くさび４２の下面の導電性金属板４３の載置領域が凹部に形成されており、第１分割下くさび４２の下面と導電性金属板４３は面一となっている。第１分割上くさび４１は、下面中央部に凸部４２ａと嵌合可能な凹部４１ａを有している。 17 and 18, the first divided wedge 40 is a composite wedge including a first divided upper wedge 41, a first divided lower wedge 42, and a conductive metal plate 43. The first divided lower wedge 42 is formed in a substantially rectangular parallelepiped shape in which a protruding portion 42a extending in the axial direction is formed at the center of the upper surface. The conductive metal plate 43 is formed in a rectangular flat plate shape, arranged on the convex portion 42a, folded back from the first divided lower wedge 42 to both axial sides, and both ends of the first divided lower wedge 42 in the axial direction. It extends along the surface and is arranged along the lower surface of the first divided lower wedge 42. At this time, the mounting regions of the conductive metal plates 43 on both end surfaces in the axial direction of the first divided lower wedge 42 are formed in the recesses, and both end surfaces in the axial direction of the first divided lower wedge 42 and the conductive metal plates are formed. 43 is flush. Similarly, the mounting area of the conductive metal plate 43 on the lower surface of the first divided lower wedge 42 is formed in the recess, and the lower surface of the first divided lower wedge 42 and the conductive metal plate 43 are flush with each other. . The 1st division | segmentation upper wedge 41 has the recessed part 41a which can be fitted with the convex part 42a in the lower surface center part.
　第１分割くさび４０は、凹部４１ａを凸部４２ａに嵌着して、第１分割上くさび４１と第１分割下くさび４２とを一体化して構成される。このとき、第１分割上くさび４１と第１分割下くさび４２は、軸方向の両端面が面一となっている。ここで、一体化された第１分割上くさび４１と第１分割下くさび４２とが本体部となり、導電性金属板４３が通電体となる。なお、第１分割上くさび４１と第１分割下くさび４２とを一体化する方法は，上記実施の形態１と同様である。 The first divided wedge 40 is configured by fitting the concave portion 41a to the convex portion 42a and integrating the first divided upper wedge 41 and the first divided lower wedge 42 together. At this time, the first divided upper wedge 41 and the first divided lower wedge 42 have both axial end surfaces flush with each other. Here, the integrated first divided upper wedge 41 and the first divided lower wedge 42 serve as a main body portion, and the conductive metal plate 43 serves as an energizing body. The method of integrating the first divided upper wedge 41 and the first divided lower wedge 42 is the same as in the first embodiment.
　第１分割くさび４０においても、第１分割上くさび４１、第１分割下くさび４２および導電性金属板４３に、半径方向通風路２０が形成されている。第１分割上くさび４１および第１分割下くさび４２は、高強度の非磁性材、例えばステンレス鋼で作製されている。導電性金属板４３は、導電性金属板３３と同等の導電性を有する材料、例えば銅又は銅合金で作製される。 Also in the first divided wedge 40, the radial ventilation path 20 is formed in the first divided upper wedge 41, the first divided lower wedge 42 and the conductive metal plate 43. The first divided upper wedge 41 and the first divided lower wedge 42 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 43 is made of a material having conductivity equivalent to that of the conductive metal plate 33, for example, copper or a copper alloy.
　第２分割くさび４５は、図１９から図２１に示されるように、第２分割上くさび４６と、第２分割下くさび４７と、導電性金属板４８と、を備える複合くさびである。第２分割下くさび４７は、第２分割上くさび４６より軸方向長さが長く作製され、軸方向に延びる凸部４７ａが上面中央部に形成されている。導電性金属板４８は、矩形平板状に作製され、凸部４７ａに配置され、第２分割下くさび４７から軸方向他側への突出部を折り返して、第２分割下くさび４７の軸方向の他端面に沿って延びて第２分割下くさび４７の下面に沿うように配置される。このとき、第２分割下くさび４７の軸方向の他端面の導電性金属板４８の載置領域が凹部に形成されており、第２分割下くさび４７の軸方向の他端面と導電性金属板４８は面一となっている。同様に、第２分割下くさび４７の下面の導電性金属板４８の載置領域が凹部に形成されており、第２分割下くさび４７の下面と導電性金属板４８は面一となっている。 As shown in FIGS. 19 to 21, the second divided wedge 45 is a composite wedge including a second divided upper wedge 46, a second divided lower wedge 47, and a conductive metal plate 48. The second divided lower wedge 47 is made longer than the second divided upper wedge 46 in the axial direction, and a convex portion 47a extending in the axial direction is formed at the center of the upper surface. The conductive metal plate 48 is formed in a rectangular flat plate shape, arranged on the convex portion 47a, folded back from the second divided lower wedge 47 to the other side in the axial direction, and in the axial direction of the second divided lower wedge 47. It extends along the other end surface and is arranged along the lower surface of the second divided lower wedge 47. At this time, the mounting region of the conductive metal plate 48 on the other end surface in the axial direction of the second divided lower wedge 47 is formed in the recess, and the other end surface in the axial direction of the second divided lower wedge 47 and the conductive metal plate 48 is the same. Similarly, the mounting area of the conductive metal plate 48 on the lower surface of the second divided lower wedge 47 is formed in the recess, and the lower surface of the second divided lower wedge 47 and the conductive metal plate 48 are flush with each other. .
　また、導電性金属板４８は、凸部４７ａに配置されて、第２分割下くさび４７から軸方向一側への突出部を折り返して、第２分割下くさび４７の軸方向の一端面に沿って延びる。さらに、導電性金属板４８は、第２分割下くさび４７の軸方向一端側への突出部の上面、軸方向の一端面および下面に沿うように配置される。このとき、第２分割下くさび４７の軸方向の一端面、さらに第２分割下くさび４７の軸方向一側への突出部の上面、軸方向一端面および下面の導電性金属板４８の載置領域が凹部に形成されており、導電性金属板４８が第２分割下くさび４７に面一に配置されている。 In addition, the conductive metal plate 48 is disposed on the convex portion 47 a, folds the protruding portion from the second divided lower wedge 47 to the one side in the axial direction, and extends along one axial end surface of the second divided lower wedge 47. Extend. Further, the conductive metal plate 48 is arranged along the upper surface, the one end surface in the axial direction, and the lower surface of the projecting portion of the second divided lower wedge 47 toward the one end side in the axial direction. At this time, one end surface of the second divided lower wedge 47 in the axial direction, and further, the upper surface of the protruding portion on the one side in the axial direction of the second divided lower wedge 47, the one end surface in the axial direction, and the conductive metal plate 48 on the lower surface The region is formed in the recess, and the conductive metal plate 48 is disposed flush with the second divided lower wedge 47.
　第２分割上くさび４６は、下面中央部に凸部４７ａと嵌合可能な凹部４６ａを有している。そして、第２分割くさび４５は、凹部４６ａを凸部４７ａに嵌着して、第２分割上くさび４６と第２分割下くさび４７とを一体化して構成される。このとき、第２分割下くさび４７は、第２分割上くさび４６から軸方向一端側に突出し、第２分割上くさび４６と第２分割下くさび４７の軸方向の他端面は、面一となっている。ここで、一体化された第２分割上くさび４６と第２分割下くさび４７とが本体部となり、導電性金属板４８が通電体となる。なお、第２分割上くさび４６と第２分割下くさび４７とを一体化する方法は、上記実施の形態１と同様である。 The second divided upper wedge 46 has a concave portion 46a that can be fitted to the convex portion 47a at the center of the lower surface. The second divided wedge 45 is configured by fitting the concave portion 46 a to the convex portion 47 a and integrating the second divided upper wedge 46 and the second divided lower wedge 47. At this time, the second divided lower wedge 47 protrudes from the second divided upper wedge 46 to one axial end side, and the other axial end surfaces of the second divided upper wedge 46 and the second divided lower wedge 47 are flush with each other. ing. Here, the integrated second divided upper wedge 46 and the second divided lower wedge 47 serve as a main body portion, and the conductive metal plate 48 serves as an energizing body. The method of integrating the second divided upper wedge 46 and the second divided lower wedge 47 is the same as in the first embodiment.
　第２分割くさび４５においても、第２分割上くさび４６、第２分割下くさび４７、および導電性金属板４８に、半径方向通風路２０が形成されている。第２分割上くさび４６および第２分割下くさび４７は、高強度の非磁性材、例えばステンレス鋼で作製されている。導電性金属板４８は、導電性金属板４３と同じ材料で作製される。ここでは、スロット１０の軸方向一端部に設置される第２分割くさび４５について説明しているが、スロット１０の軸方向他端部では、第２分割くさび４５は、第２分割下くさび４７が第２分割上くさび４６から軸方向他端側に突出するように設置されている。 Also in the second divided wedge 45, the radial ventilation path 20 is formed in the second divided upper wedge 46, the second divided lower wedge 47, and the conductive metal plate 48. The second divided upper wedge 46 and the second divided lower wedge 47 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 48 is made of the same material as the conductive metal plate 43. Here, the second split wedge 45 installed at one end in the axial direction of the slot 10 is described. However, at the other end in the axial direction of the slot 10, the second split wedge 45 is replaced by the second split lower wedge 47. It is installed so as to protrude from the second divided upper wedge 46 to the other end side in the axial direction.
　実施の形態２では、第１分割くさび４０は、導電性金属板４３が導電性の機能を担っているので、導電性金属板４３を保持する第１分割上くさび４１と第１分割下くさび４２とには、高い導電性が不要となる。第２分割くさび４５においても，同様である。そこで、第１分割上くさび４１、第１分割下くさび４２、第２分割上くさび４６および第２分割下くさび４７に求められる特性を強度に特化できる。これにより、第１分割上くさび４１、第１分割下くさび４２、第２分割上くさび４６および第２分割下くさび４７を、導電性金属板４３および導電性金属板４８よりも高強度の非磁性材、例えばステンレス鋼を用いることができる。 In the second embodiment, since the conductive metal plate 43 has a conductive function in the first divided wedge 40, the first divided upper wedge 41 and the first divided lower wedge 42 that hold the conductive metal plate 43. Therefore, high conductivity is not necessary. The same applies to the second divided wedge 45. Therefore, the characteristics required for the first divided upper wedge 41, the first divided lower wedge 42, the second divided upper wedge 46, and the second divided lower wedge 47 can be specialized in strength. As a result, the first divided upper wedge 41, the first divided lower wedge 42, the second divided upper wedge 46 and the second divided lower wedge 47 are made stronger than the conductive metal plate 43 and the conductive metal plate 48. A material such as stainless steel can be used.
　したがって、実施の形態２においても、上記実施の形態１と同様の効果が得られる。
　また、実施の形態２によれば、導電性金属板４３，４８が、第１分割下くさび４２の凸部４２ａおよび第２分割下くさび４７の凸部４７ａに設置されているので、導電性金属板４３，４８と電機子巻線５との間の距離が短くなる。これにより、電機子巻線５からの磁束により導電性金属板４３，４８に誘起される渦電流が多くなり、渦電流による回転子コア８の発熱が抑制される。 Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.
Further, according to the second embodiment, since the conductive metal plates 43 and 48 are installed on the convex portion 42a of the first divided lower wedge 42 and the convex portion 47a of the second divided lower wedge 47, the conductive metal plates The distance between the plates 43 and 48 and the armature winding 5 is shortened. Thereby, the eddy current induced in the conductive metal plates 43 and 48 by the magnetic flux from the armature winding 5 increases, and the heat generation of the rotor core 8 due to the eddy current is suppressed.
　実施の形態３．
　図２２は、この発明の実施の形態３に係る回転電機における回転子のスロット周りを示す要部縦断面図である。 Embodiment 3 FIG.
FIG. 22 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 3 of the present invention.
　実施の形態３では、図２２に示されるように、第３分割くさび３０Ａを第３分割くさび１８のそれぞれに替えてスロット１０に設置し、ダンパーバー１３を省略している点を除いて、上記実施の形態１と同様に構成されている。実施の形態３では、くさびは、第１分割くさび３０、第２分割くさび３５、および第３分割くさび３０Ａに分割構成されている。 In the third embodiment, as shown in FIG. 22, the third divided wedge 30 </ b> A is installed in the slot 10 instead of each of the third divided wedges 18, except that the damper bar 13 is omitted. The configuration is the same as in the first embodiment. In Embodiment 3, the wedge is divided into a first divided wedge 30, a second divided wedge 35, and a third divided wedge 30A.
　第３分割くさび３０Ａは、軸方向長さが短い点を除いて、第１分割くさび３０と同様に構成された複合くさびである。
　この実施の形態３では、回転子コア８のスロット１０のそれぞれに設置されるすべてのくさびが、第１分割くさび３０、第２分割くさび３５および第３分割くさび３０Ａの複合くさびにより構成されているので、上記実施の形態１と同様の効果が得られる。 The third divided wedge 30A is a composite wedge configured in the same manner as the first divided wedge 30 except that the axial length is short.
In the third embodiment, all the wedges installed in each of the slots 10 of the rotor core 8 are constituted by the composite wedges of the first divided wedge 30, the second divided wedge 35, and the third divided wedge 30A. Therefore, the same effect as in the first embodiment can be obtained.
　実施の形態３によれば、第２分割くさび３５が回転子コア８のスロット１０の軸方向両端部に設置され、第１分割くさび３０および第３分割くさび３０Ａが第２分割くさび３５間に１列に配列してスロット１０に設置されている。これにより、第１分割くさび３０および第３分割くさび３０Ａの導電性金属板３３と第２分割くさび３５の第１導電性金属板３８ａおよび第２導電性金属板３８ｂとが互いに電気的に接触する状態で軸方向に１列に配列されている。このように、互いに電気的に接触する状態で軸方向に１列に配列された導電性金属板３３、第１導電性金属板３８ａおよび第２導電性金属板３８ｂが、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。これにより、界磁巻線１１と電機子巻線５との間の距離がさらに短くなり、界磁巻線１１から生じる磁束がより多く電機子巻線５に鎖交する。その結果、設定された出力電流を得るために界磁巻線１１に通電される界磁電流を削減できるので、界磁銅損が削減され、効率が一層向上される。 According to the third embodiment, the second split wedges 35 are installed at both axial ends of the slot 10 of the rotor core 8, and the first split wedge 30 and the third split wedge 30 </ b> A are 1 between the second split wedges 35. Arranged in rows and installed in slots 10. Thereby, the conductive metal plate 33 of the first divided wedge 30 and the third divided wedge 30A and the first conductive metal plate 38a and the second conductive metal plate 38b of the second divided wedge 35 are in electrical contact with each other. In the state, they are arranged in a line in the axial direction. Thus, the conductive metal plate 33, the first conductive metal plate 38a, and the second conductive metal plate 38b arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13. The damper bar 13 can be omitted. Thereby, the distance between the field winding 11 and the armature winding 5 is further shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5. As a result, the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is further improved.
　なお、実施の形態３においては、接着と、溶接、ロウ付けおよび撹拌接合のいずれかと、を併用して、第１分割くさび３０、第２分割くさび３５、および第３分割くさび３０Ａをそれぞれ一体化してもよい。この場合、溶接、ロウ付けおよび撹拌接合のいずれかによる接合工程に先立って、接着により分割上くさびと分割下くさびとを接合することにより、分割上くさびと分割下くさびとを高精度に位置決め固定できる。これにより、溶接、ロウ付けおよび撹拌接合のいずれかによる接合後の形状の精度が高められる。その結果、第１分割くさび３０、第２分割くさび３５および第３分割くさび３０Ａの軸方向の端面における軸方向の凹凸が低減される。そこで、第１分割くさび３０と第３分割くさび３０Ａとの間、第３分割くさび３０Ａ間、および第３分割くさび３０Ａと第２分割くさび３５との間の接触面積が拡大され、導電性金属板３３同士の接触部、および導電性金属板３３と第１導電性金属板３８ａとの接触部での発熱が低減される。 In the third embodiment, the first divided wedge 30, the second divided wedge 35, and the third divided wedge 30A are respectively integrated by using bonding and any one of welding, brazing, and stir welding. May be. In this case, prior to the joining process by any of welding, brazing and stir welding, the upper and lower wedges are positioned and fixed with high precision by bonding the upper and lower wedges by bonding. it can. Thereby, the precision of the shape after joining by any of welding, brazing, and stirring joining is improved. As a result, the unevenness in the axial direction on the axial end surfaces of the first divided wedge 30, the second divided wedge 35, and the third divided wedge 30A is reduced. Therefore, the contact area between the first divided wedge 30 and the third divided wedge 30A, between the third divided wedge 30A, and between the third divided wedge 30A and the second divided wedge 35 is increased, and the conductive metal plate Heat generation at the contact portion between 33 and the contact portion between the conductive metal plate 33 and the first conductive metal plate 38a is reduced.
　実施の形態４．
　図２３は、この発明の実施の形態４に係る回転電機における回転子のスロット周りを示す要部縦断面図である。 Embodiment 4 FIG.
FIG. 23 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 4 of the present invention.
　実施の形態４では、図２３に示されるように、第３分割くさび４０Ａを第３分割くさび１８のそれぞれに替えてスロット１０に設置し、ダンパーバー１３を省略している点を除いて、上記実施の形態２と同様に構成されている。実施の形態４では、くさびは、第１分割くさび４０、第２分割くさび４５、および第３分割くさび４０Ａに分割構成されている。 In the fourth embodiment, as shown in FIG. 23, the third divided wedge 40A is installed in the slot 10 in place of the third divided wedge 18, and the damper bar 13 is omitted, except that the damper bar 13 is omitted. The configuration is the same as in the second embodiment. In the fourth embodiment, the wedge is divided into a first divided wedge 40, a second divided wedge 45, and a third divided wedge 40A.
　第３分割くさび４０Ａは、軸方向長さが短い点を除いて、第１分割くさび４０と同様に構成された複合くさびである。
　この実施の形態４では、回転子コア８のスロット１０のそれぞれに設置されるすべてのくさびが、第１分割くさび４０、第２分割くさび４５、および第３分割くさび４０Ａの複合くさびにより構成されているので、上記実施の形態２と同様の効果が得られる。 The third split wedge 40A is a composite wedge configured in the same manner as the first split wedge 40 except that the axial length is short.
In the fourth embodiment, all the wedges installed in each of the slots 10 of the rotor core 8 are constituted by the composite wedges of the first divided wedge 40, the second divided wedge 45, and the third divided wedge 40A. Therefore, the same effect as in the second embodiment can be obtained.
　実施の形態４によれば、第２分割くさび４５が回転子コア８のスロット１０の軸方向両端部に設置され、第１分割くさび４０および第３分割くさび４０Ａが第２分割くさび４５間に１列に配列してスロット１０に設置されている。これにより、第１分割くさび４０および第３分割くさび４０Ａの導電性金属板４３と第２分割くさび４５の導電性金属板４８とが互いに電気的に接触する状態で軸方向に１列に配列されている。このように、互いに電気的に接触する状態で軸方向に１列に配列された導電性金属板４３および導電性金属板４８が、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。これにより、界磁巻線１１と電機子巻線５との間の距離がさらに短くなり、界磁巻線１１から生じる磁束がより多く電機子巻線５に鎖交する。その結果、設定された出力電流を得るために界磁巻線１１に通電される界磁電流を削減できるので、界磁銅損が削減され、効率が一層向上される。 According to the fourth embodiment, the second divided wedge 45 is installed at both axial ends of the slot 10 of the rotor core 8, and the first divided wedge 40 and the third divided wedge 40 </ b> A are 1 between the second divided wedges 45. Arranged in rows and installed in slots 10. Thereby, the conductive metal plates 43 of the first divided wedge 40 and the third divided wedge 40A and the conductive metal plates 48 of the second divided wedge 45 are arranged in a line in the axial direction in a state where they are in electrical contact with each other. ing. Thus, the conductive metal plate 43 and the conductive metal plate 48 arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. . Thereby, the distance between the field winding 11 and the armature winding 5 is further shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5. As a result, the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is further improved.
　なお、実施の形態４においては、上記実施の形態３と同様に、接着と、溶接、ロウ付けおよび撹拌接合のいずれかと、を併用して、第１分割くさび４０、第２分割くさび４５、および第３分割くさび４０Ａをそれぞれ一体化してもよい。
　また、また、他の実施の形態においても、上記実施の形態３，４と同様に、接着と、溶接、ロウ付けおよび撹拌接合のいずれかと、を併用して、第１分割くさびおよび第２分割くさびをそれぞれ一体化してもよい。 In the fourth embodiment, as in the third embodiment, the first divided wedge 40, the second divided wedge 45, and any one of adhesion, welding, brazing, and stirring joining are used together. The third divided wedge 40A may be integrated.
Also, in the other embodiments, as in the third and fourth embodiments, the first divided wedge and the second divided are used in combination with adhesion and any one of welding, brazing, and stir welding. Each wedge may be integrated.
　実施の形態５．
　図２４は、この発明の実施の形態５に係る回転電機における回転子のスロット周りを示す要部縦断面図である。 Embodiment 5. FIG.
FIG. 24 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 5 of the present invention.
　実施の形態５では、図２４に示されるように、第１塊状くさび５０を第１分割くさび３０に替えてスロット１０の軸方向中央部に設置し、第２塊状くさび５１を第２分割くさび３５に替えてスロット１０の軸方向両端部に設置している点を除いて、上記実施の形態３と同様に構成されている。実施の形態５では、くさびは、第１塊状くさび５０、第２塊状くさび５１、および第３分割くさび３０Ａに分割構成されている。 In the fifth embodiment, as shown in FIG. 24, the first lump wedge 50 is installed in the center of the slot 10 in place of the first split wedge 30 and the second lump wedge 51 is replaced by the second split wedge 35. The configuration is the same as that of the third embodiment except that it is installed at both ends in the axial direction of the slot 10 instead. In the fifth embodiment, the wedge is divided into a first lump wedge 50, a second lump wedge 51, and a third divided wedge 30A.
　第１塊状くさび５０および第２塊状くさび５１は、導電性金属板３３と同様の高い導電性の材料、例えば銅又は銅合金で一塊に作製されている。 The first lump wedge 50 and the second lump wedge 51 are made of the same highly conductive material as that of the conductive metal plate 33, for example, copper or a copper alloy in one lump.
　この実施の形態５では、第１塊状くさび５０、第２塊状くさび５１、および第３分割くさび３０Ａの導電性金属板３３が、互いに電気的に接触する状態で軸方向に１列に配列されている。このように、互いに電気的に接触する状態で軸方向に１列に配列された第１塊状くさび５０、第２塊状くさび５１、および導電性金属板３３が、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。したがって、実施の形態５においても、上記実施の形態３と同様の効果が得られる。 In the fifth embodiment, the conductive metal plates 33 of the first lump wedge 50, the second lump wedge 51, and the third divided wedge 30A are arranged in a line in the axial direction in a state of being in electrical contact with each other. Yes. Thus, the first lump wedges 50, the second lump wedges 51, and the conductive metal plate 33 arranged in a line in the axial direction in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, in the fifth embodiment, the same effect as in the third embodiment can be obtained.
　また、第１塊状くさび５０および第２塊状くさび５１が、高い導電性の金属で塊状体に作製されているので、第１塊状くさび５０と回転子コア８との間の接触抵抗が低減され、第２塊状くさび５１と保持環９との間の接触抵抗が低減される。これにより、回転子コア８の表面に流れる渦電流をより多く、ダンパーバーとして機能する導電性金属板３３に流すことができる。その結果、渦電流による回転子コア８の発熱を抑制することができる。 Further, since the first lump wedge 50 and the second lump wedge 51 are made into a lump with a highly conductive metal, the contact resistance between the first lump wedge 50 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 51 and the retaining ring 9 is reduced. Thereby, more eddy currents flowing on the surface of the rotor core 8 can be supplied to the conductive metal plate 33 functioning as a damper bar. As a result, heat generation of the rotor core 8 due to eddy current can be suppressed.
　ここで、第１塊状くさび５０および第２塊状クサビ５１の導電性金属板３３および保持環９との接触面に、第１塊状くさび５０および第２塊状クサビ５１よりも高い導電性の金属、例えば金、銀などのメッキを施し、接触抵抗を低減してもよい。 Here, a conductive metal higher than the first lump wedge 50 and the second lump wedge 51 on the contact surface of the first lump wedge 50 and the second lump wedge 51 with the conductive metal plate 33 and the holding ring 9, for example, The contact resistance may be reduced by plating with gold, silver or the like.
　なお、上記実施の形態５では、実施の形態３の回転子において、第１塊状くさび５０が第１分割くさび３０に替えてスロット１０の軸方向中央部に設置され、第２塊状くさび５１が第２分割くさび３５に替えてスロット１０の軸方向両端部に設置されているが、実施の形態４の回転子において、第１塊状くさび５０が第１分割くさび４０に替えてスロット１０の軸方向中央部に設置され、第２塊状くさび５１が第２分割くさび４５に替えてスロット１０の軸方向両端部に設置されてもよい。 In the fifth embodiment, in the rotor of the third embodiment, the first lump wedge 50 is installed at the center in the axial direction of the slot 10 instead of the first split wedge 30, and the second lump wedge 51 is the first lump wedge 51. In the rotor of the fourth embodiment, the first lump wedge 50 is replaced with the first divided wedge 40 in the axial center of the slot 10 instead of the two divided wedges 35. The second lump wedge 51 may be installed at both ends in the axial direction of the slot 10 instead of the second divided wedge 45.
　実施の形態６．
　図２５は、この発明の実施の形態６に係る回転電機における回転子のスロット周りを示す要部縦断面図、図２６は、この発明の実施の形態６に係る回転電機における回転子の第１分割くさびを示す縦断面図、図２７は、この発明の実施の形態６に係る回転電機における回転子の第１分割くさびを軸方向から見た端面図、図２８は、この発明の実施の形態６に係る回転電機における回転子の第２分割くさびを示す縦断面図、図２９は、この発明の実施の形態６に係る回転電機における回転子の第２分割くさびを軸方向他端側から見た端面図、図３０は、この発明の実施の形態６に係る回転電機における回転子の第２分割くさびを軸方向一端側から見た端面図である。 Embodiment 6 FIG.
FIG. 25 is a longitudinal sectional view of a main part showing the periphery of a rotor slot in a rotary electric machine according to Embodiment 6 of the present invention, and FIG. 26 shows a first rotor of the rotary electric machine according to Embodiment 6 of the present invention. 27 is a longitudinal sectional view showing the divided wedge, FIG. 27 is an end view of the first divided wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention viewed from the axial direction, and FIG. 28 is an embodiment of the present invention. FIG. 29 is a longitudinal sectional view showing a second divided wedge of the rotor in the rotary electric machine according to FIG. 6, and FIG. 29 is a view of the second divided wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention from the other end side in the axial direction. FIG. 30 is an end view of the second split wedge of the rotor in the rotary electric machine according to Embodiment 6 of the present invention as viewed from one end in the axial direction.
　実施の形態６では、図２５に示されるように、第１分割くさび６０が第１分割くさび３０に替えてスロット１０の軸方向の中央部に設置され、第２分割くさび６５が第２分割くさび３５に替えてスロット１０の軸方向の両端部に設置され、複数の第３分割くさび６０Ａが第３分割くさび３０Ａに替えてスロット１０の第１分割くさび６０と第２分割くさび６５との間に設置されている。実施の形態６では、くさびは、第１分割くさび６０、第２分割くさび６５、および第３分割くさび６０Ａに分割構成されている。
　なお、他の構成は、上記実施の形態３と同様に構成されている。 In the sixth embodiment, as shown in FIG. 25, the first divided wedge 60 is installed at the central portion in the axial direction of the slot 10 instead of the first divided wedge 30, and the second divided wedge 65 is the second divided wedge. 35 is installed at both ends in the axial direction of the slot 10, and a plurality of third divided wedges 60 </ b> A are arranged between the first divided wedge 60 and the second divided wedge 65 of the slot 10 instead of the third divided wedge 30 </ b> A. is set up. In the sixth embodiment, the wedge is divided into a first divided wedge 60, a second divided wedge 65, and a third divided wedge 60A.
Other configurations are the same as those in the third embodiment.
　第１分割くさび６０は、図２６および図２７に示されるように、第１分割上くさび６１と、第１分割下くさび６２と、導電性金属板６３と、を備える複合くさびである。第１分割下くさび６２は、軸方向一側に傾いた平行四辺形の縦断面形状の角柱に作製され、溝方向を軸方向とする凹部６２ａが上面中央部に形成されている。導電性金属板６３は、矩形平板状に作製され、凹部６２ａに配置され、第１分割下くさび６２から軸方向両側への突出部を折り返して、第１分割下くさび６２の軸方向の両端面に沿って延びて第１分割下くさび６２の下面に沿うように配置される。このとき、第１分割下くさび６２の軸方向の両端面の導電性金属板６３の載置領域が凹部に形成されており、第１分割下くさび６２の軸方向の両端面と導電性金属板６３は面一となっている。同様に、第１分割下くさび６２の下面の導電性金属板６３の載置領域が凹部に形成されており、第１分割下くさび６２の下面と導電性金属板６３は面一となっている。第１分割上くさび６１は、下面中央部に凹部６２ａと嵌合可能な凸部６１ａを有している。ここで、導電性金属板６３の軸方向両側の露出面が傾斜面６４となっている。 The first split wedge 60 is a composite wedge including a first split upper wedge 61, a first split lower wedge 62, and a conductive metal plate 63, as shown in FIGS. The first divided lower wedge 62 is formed as a prism having a parallelogram-shaped vertical cross section inclined toward one side in the axial direction, and a concave portion 62a having the axial direction in the groove direction is formed at the center of the upper surface. The conductive metal plate 63 is formed in a rectangular flat plate shape, is disposed in the recess 62a, and folds the protruding portions from the first divided lower wedge 62 to both sides in the axial direction so that both end surfaces of the first divided lower wedge 62 in the axial direction are folded back. Extending along the lower surface of the first divided lower wedge 62. At this time, the mounting regions of the conductive metal plates 63 on both end surfaces in the axial direction of the first divided lower wedge 62 are formed in the recesses, and both end surfaces in the axial direction of the first divided lower wedge 62 and the conductive metal plates are formed. 63 is flush. Similarly, the mounting area of the conductive metal plate 63 on the lower surface of the first divided lower wedge 62 is formed in the recess, and the lower surface of the first divided lower wedge 62 and the conductive metal plate 63 are flush with each other. . The 1st division | segmentation upper wedge 61 has the convex part 61a which can be fitted with the recessed part 62a in the lower surface center part. Here, the exposed surfaces on both axial sides of the conductive metal plate 63 are inclined surfaces 64.
　第１分割くさび６０は、凸部６１ａを凹部６２ａに嵌着して、第１分割上くさび６１と第１分割下くさび６２とを一体化して構成される。ここで、一体化された第１分割上くさび６１と第１分割下くさび６２とが本体部となり、導電性金属板６３が通電体となる。 The first divided wedge 60 is configured by fitting the convex portion 61a into the concave portion 62a and integrating the first divided upper wedge 61 and the first divided lower wedge 62 together. Here, the integrated first divided upper wedge 61 and the first divided lower wedge 62 serve as a main body portion, and the conductive metal plate 63 serves as a current-carrying body.
　第１分割くさび６０においても、第１分割上くさび６１、第１分割下くさび６２および導電性金属板６３に、半径方向通風路２０が形成されている。第１分割上くさび６１および第１分割下くさび６２は、高強度の非磁性材、例えばステンレス鋼で作製されている。導電性金属板６３は、導電性金属板３３と同じ材料、例えば銅又は銅合金で作製される。
　第３分割くさび６０Ａは、軸方向長さが短い点を除いて、第１分割くさび６０と同様に構成された複合くさびである。この第３分割くさび６０Ａにおいても、導電性金属板６３の軸方向両側の露出面が傾斜面６４となっている。 Also in the first divided wedge 60, the radial ventilation path 20 is formed in the first divided upper wedge 61, the first divided lower wedge 62 and the conductive metal plate 63. The first divided upper wedge 61 and the first divided lower wedge 62 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 63 is made of the same material as the conductive metal plate 33, for example, copper or a copper alloy.
The third split wedge 60A is a composite wedge configured in the same manner as the first split wedge 60 except that the axial length is short. Also in the third divided wedge 60 </ b> A, the exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64.
　第２分割くさび６５は、図２８から図３０に示されるように、第２分割上くさび６６と、第２分割下くさび６７と、第１導電性金属板６８ａと、第２導電性金属板６８ｂと、を備える複合くさびである。第２分割下くさび６７は、第２分割上くさび６６より軸方向長さが長い、直方体の軸方向他端面が軸方向一側に傾いた角柱に作製され、溝方向を軸方向とする凹部６７ａが上面中央部に形成されている。第２分割下くさび６７の軸方向他端面の傾斜角度は、第１分割下くさび６２の軸方向他端面の傾斜角度と同じである。第１導電性金属板６８ａは、矩形平板状に作製され、凹部６７ａに配置され、第２分割下くさび６７から軸方向両側への突出部を折り返して、第２分割下くさび６７の軸方向の両端面に沿って延びて第２分割下くさび６７の下面に沿うように配置される。このとき、第２分割下くさび６７の軸方向の両端面の第１導電性金属板６８ａの載置領域が凹部に形成されており、第２分割下くさび６７の軸方向の両端面と第１導電性金属板６８ａは面一となっている。同様に、第２分割下くさび６７の下面の第１導電性金属板６８ａの載置領域が凹部に形成されており、第２分割下くさび６７の下面と第１導電性金属板６８ａは面一となっている。 As shown in FIGS. 28 to 30, the second divided wedge 65 includes a second divided upper wedge 66, a second divided lower wedge 67, a first conductive metal plate 68a, and a second conductive metal plate 68b. And a composite wedge. The second divided lower wedge 67 is formed as a prism having a longer length in the axial direction than the second divided upper wedge 66, the other axial end face of the rectangular parallelepiped is inclined toward one side in the axial direction, and a concave portion 67a having the groove direction as the axial direction. Is formed at the center of the upper surface. The inclination angle of the other axial end surface of the second divided lower wedge 67 is the same as the inclination angle of the other axial end surface of the first divided lower wedge 62. The first conductive metal plate 68a is formed in a rectangular flat plate shape, and is disposed in the recess 67a. The first conductive metal plate 68a is bent in the axial direction of the second divided lower wedge 67 by folding back the protruding portions from the second divided lower wedge 67 to both sides in the axial direction. It extends along both end faces and is arranged along the lower surface of the second divided lower wedge 67. At this time, the mounting regions of the first conductive metal plates 68a on both end surfaces in the axial direction of the second divided lower wedge 67 are formed in the recesses, and both end surfaces in the axial direction of the second divided lower wedge 67 and the first The conductive metal plate 68a is flush. Similarly, the mounting region of the first conductive metal plate 68a on the lower surface of the second divided lower wedge 67 is formed in the recess, and the lower surface of the second divided lower wedge 67 and the first conductive metal plate 68a are flush with each other. It has become.
　第２分割上くさび６６は、下面中央部に凹部６７ａと嵌合可能な凸部６６ａを有している。第２導電性金属板６８ｂは、矩形平板状に作製され、凸部６６ａに配置され、第２分割上くさび６６から軸方向一端側への突出部を折り返して、第２分割上くさび６６の軸方向の一端面に沿うように配置される。このとき、第２分割上くさび６６の軸方向の一端面の第２導電性金属板６８ｂの載置領域が凹部に形成されており、第２分割上くさび６６の軸方向の一端面と第２導電性金属板６８ｂは面一となっている。そして、第２分割くさび６５は、凸部６６ａを凹部６７ａに嵌着して、第２分割上くさび６６と第２分割下くさび６７とを一体化して構成される。このとき、第２分割下くさび６７は、第２分割上くさび６６から軸方向一端側に突出している。ここで、一体化された第２分割上くさび６６と第２分割下くさび６７とが本体部となり、第１導電性金属板６８ａおよび第２導電性金属板６８ｂが通電体となる。第１導電性金属板６８ａの第２分割上くさび６６の軸方向他側の露出面は、傾斜面６９となっている。 2nd division | segmentation upper wedge 66 has the convex part 66a which can be fitted with the recessed part 67a in the lower surface center part. The second conductive metal plate 68b is formed in a rectangular flat plate shape, and is disposed on the convex portion 66a. The second conductive metal plate 68b is folded back from the second divided upper wedge 66 toward the one end side in the axial direction, so that the axis of the second divided upper wedge 66 is obtained. It arrange | positions along the one end surface of a direction. At this time, the mounting region of the second conductive metal plate 68b on the one end surface in the axial direction of the second divided upper wedge 66 is formed in the concave portion, and one end surface in the axial direction of the second divided upper wedge 66 and the second end wedge The conductive metal plate 68b is flush. And the 2nd division | segmentation wedge 65 fits the convex part 66a to the recessed part 67a, and is comprised by integrating the 2nd division | segmentation upper wedge 66 and the 2nd division | segmentation lower wedge 67. FIG. At this time, the second divided lower wedge 67 protrudes from the second divided upper wedge 66 to one axial end side. Here, the integrated second divided upper wedge 66 and second divided lower wedge 67 serve as the main body, and the first conductive metal plate 68a and the second conductive metal plate 68b serve as the current conductor. An exposed surface on the other axial side of the second divided upper wedge 66 of the first conductive metal plate 68a is an inclined surface 69.
　第２分割くさび６５においても、第２分割上くさび６６、第２分割下くさび６７、第１導電性金属板６８ａおよび第２導電性金属板６８ｂに、半径方向通風路２０が形成されている。第２分割上くさび６６および第２分割下くさび６７は、高強度の非磁性材、例えばステンレス鋼で作製されている。第１導電性金属板６８ａおよび第２導電性金属板６８ｂは、導電性金属板６３と同じ材料で作製される。なお、第１導電性金属板６８ａと第２導電性金属板６８ｂとの２枚の金属板を用いているが、１枚の金属板を用い、第２分割くさび６５から軸方向一端側への突出部を分割して上下に折り返してもよい。ここでは、スロット１０の軸方向一端部に設置される第２分割くさび６５について説明しているが、スロット１０の軸方向他端部では、第２分割くさび６５は、第２分割下くさび６７が第２分割上くさび６６から軸方向他端側に突出するように設置されている。 Also in the second divided wedge 65, the radial ventilation path 20 is formed in the second divided upper wedge 66, the second divided lower wedge 67, the first conductive metal plate 68a, and the second conductive metal plate 68b. The second divided upper wedge 66 and the second divided lower wedge 67 are made of a high-strength nonmagnetic material such as stainless steel. The first conductive metal plate 68 a and the second conductive metal plate 68 b are made of the same material as the conductive metal plate 63. In addition, although two metal plates of the first conductive metal plate 68a and the second conductive metal plate 68b are used, one metal plate is used, and the second divided wedge 65 extends to one end side in the axial direction. The protruding portion may be divided and folded up and down. Here, the second split wedge 65 installed at one end in the axial direction of the slot 10 is described. However, at the other end in the axial direction of the slot 10, the second split wedge 65 is replaced by the second split lower wedge 67. It is installed so as to protrude from the second divided upper wedge 66 to the other end side in the axial direction.
　第１分割くさび６０、第２分割くさび６５、および第３分割くさび６０Ａは、回転子６が回転時に遠心力を受ける際に圧縮の荷重となる箇所で上下部分割されている。第１分割くさび６０、第２分割くさび６５、および第３分割くさび６０Ａは、例えば、上位実施の形態１と同様の方法で一体化される。 The first divided wedge 60, the second divided wedge 65, and the third divided wedge 60A are divided into upper and lower parts at locations where a compression load is applied when the rotor 6 receives centrifugal force during rotation. The first divided wedge 60, the second divided wedge 65, and the third divided wedge 60A are integrated by, for example, the same method as in the first embodiment.
　このように構成された回転子においては、第２分割くさび６５がスロット１０の軸方向両端部に設置され、第１分割くさび６０および第３分割くさび６０Ａが第２分割くさび６５間に１列に配列してスロット１０に設置されている。第１分割くさび６０および第３分割くさび６０Ａでは、導電性金属板６３の軸方向両側の露出面が傾斜面６４となっている。また、第２分割くさび６５では、第１導電性金属板６８ａの第３分割くさび６０Ａ側の露出面が傾斜面６９となっている。これらの傾斜面６４，６９の傾斜角度は同じである。 In the rotor configured as described above, the second divided wedges 65 are installed at both axial ends of the slot 10, and the first divided wedge 60 and the third divided wedge 60 </ b> A are arranged in a row between the second divided wedges 65. They are arranged in slots 10. In the first divided wedge 60 and the third divided wedge 60 </ b> A, the exposed surfaces on both sides in the axial direction of the conductive metal plate 63 are inclined surfaces 64. In the second divided wedge 65, the exposed surface of the first conductive metal plate 68 a on the third divided wedge 60 </ b> A side is an inclined surface 69. The inclination angles of these inclined surfaces 64 and 69 are the same.
　これにより、隣り合う第１分割くさび６０の導電性金属板６３と第３分割くさび６０Ａの導電性金属板６３とが電気的に接触している。隣り合う第３分割くさび６０Ａの導電性金属板６３同士が電気的に接触している。隣り合う第３分割くさび６０Ａの導電性金属板６３と第２分割くさび６５の第１導電性金属板６８ａとが電気的に接触している。このように、互いに電気的に接触する状態で軸方向に１列に配列された導電性金属板６３、第１導電性金属板６８ａおよび第２導電性金属板６８ｂが、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。これにより、界磁巻線１１と電機子巻線５との間の距離が短くなり、界磁巻線１１から生じる磁束がより多く電機子巻線５に鎖交する。その結果、設定された出力電流を得るために界磁巻線１１に通電される界磁電流を削減できるので、界磁銅損が削減され、効率が向上される。 Thereby, the conductive metal plate 63 of the adjacent first divided wedge 60 and the conductive metal plate 63 of the third divided wedge 60A are in electrical contact. The conductive metal plates 63 of the adjacent third divided wedges 60A are in electrical contact with each other. The conductive metal plate 63 of the adjacent third divided wedge 60A and the first conductive metal plate 68a of the second divided wedge 65 are in electrical contact. Thus, the conductive metal plate 63, the first conductive metal plate 68a and the second conductive metal plate 68b arranged in a line in the axial direction in a state of being in electrical contact with each other function as the damper bar 13. The damper bar 13 can be omitted. Thereby, the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5. As a result, the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is improved.
　また、導電性金属板６３、第１導電性金属板６８ａおよび第２導電性金属板６８ｂが導電性の機能を担っているので、第１分割くさび６０、第２分割くさび６５、および第３分割くさび６０Ａの本体部を高強度の非磁性材で作製でき、厚みを薄くすることができる。これにより、界磁巻線１１と電機子巻線５との間の距離が短くなり、界磁巻線１１から生じる磁束がより多く電機子巻線５に鎖交する。その結果、設定された出力電流を得るために界磁巻線１１に通電される界磁電流を削減できるので、界磁銅損が削減され、効率が向上される。 In addition, since the conductive metal plate 63, the first conductive metal plate 68a, and the second conductive metal plate 68b have a conductive function, the first split wedge 60, the second split wedge 65, and the third split The main body of the wedge 60A can be made of a high-strength nonmagnetic material, and the thickness can be reduced. Thereby, the distance between the field winding 11 and the armature winding 5 is shortened, and more magnetic flux generated from the field winding 11 is linked to the armature winding 5. As a result, the field current passed through the field winding 11 to obtain the set output current can be reduced, so that the field copper loss is reduced and the efficiency is improved.
　また、隣り合う第１分割くさび６０と第３分割くさび６０Ａの導電性金属板６３の傾斜面６４同士が、半径方向に重なって面接触状態となっている。隣り合う第３分割くさび６０Ａの導電性金属板６３の傾斜面６４同士が、半径方向に重なって面接触状態となっている。隣り合う第３分割くさび６０Ａの導電性金属板６３と第２分割くさび６５の第１導電性金属板６８ａとの傾斜面６４，６９同士が、半径方向に重なって面接触となっている。そこで、回転子の回転中の遠心力により、これらの電気的接続部の接触面圧が上昇する。これにより、導電性金属板６３、第１導電性金属板６８ａおよび第２導電性金属板６８ｂの電気的接続部の接触抵抗が減少し、接触部における発熱が抑制される。 Further, the inclined surfaces 64 of the conductive metal plates 63 of the adjacent first divided wedge 60 and third divided wedge 60A overlap each other in the surface contact state. The inclined surfaces 64 of the conductive metal plates 63 of the adjacent third divided wedges 60A overlap each other in the radial direction and are in a surface contact state. The inclined surfaces 64 and 69 of the adjacent conductive metal plate 63 of the third divided wedge 60A and the first conductive metal plate 68a of the second divided wedge 65 overlap with each other in the radial direction to form surface contact. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor. Thereby, the contact resistance of the electrical connection portion of the conductive metal plate 63, the first conductive metal plate 68a, and the second conductive metal plate 68b is reduced, and heat generation at the contact portion is suppressed.
　なお、上記実施の形態６による第１分割くさび６０、第２分割くさび６５、および第３分割くさび６０Ａは、実施の形態３における第１分割くさび３０、第２分割くさび３５、および第３分割くさび３０Ａの導電性金属板の露出面を傾斜面に構成したものと同等の構成である。そこで、実施の形態４における第１分割くさび４０、第２分割くさび４５、および第３分割くさび４０Ａの導電性金属板の露出面を傾斜面に構成しても、同様の効果が得られる。 The first divided wedge 60, the second divided wedge 65, and the third divided wedge 60A according to the sixth embodiment are the same as the first divided wedge 30, the second divided wedge 35, and the third divided wedge in the third embodiment. The exposed surface of the 30A conductive metal plate has the same configuration as the inclined surface. Therefore, even if the exposed surfaces of the conductive metal plates of the first divided wedge 40, the second divided wedge 45, and the third divided wedge 40A in the fourth embodiment are configured as inclined surfaces, the same effect can be obtained.
　実施の形態７．
　図３１は、この発明の実施の形態７に係る回転電機における回転子のスロット周りを示す要部縦断面図、図３２は、この発明の実施の形態７に係る回転電機における回転子の第１塊状くさびを示す縦断面図、図３３は、この発明の実施の形態７に係る回転電機における回転子の第２塊状くさびを示す縦断面図である。 Embodiment 7 FIG.
FIG. 31 is a longitudinal sectional view of a main part showing the periphery of a slot of a rotor in a rotary electric machine according to Embodiment 7 of the present invention, and FIG. 32 is a first view of the rotor in the rotary electric machine according to Embodiment 7 of the present invention. FIG. 33 is a longitudinal sectional view showing the second wedge of the rotor in the rotary electric machine according to Embodiment 7 of the present invention.
　実施の形態７では、図３１に示されるように、第１塊状くさび７０が第１分割くさび６０に替えてスロット１０の軸方向中央部に設置され、第２塊状くさび７２が第２分割くさび６５に替えてスロット１０の軸方向両端部に設置されている点を除いて、上記実施の形態６と同様に構成されている。実施の形態７では、くさびは、第１塊状くさび７０、第２塊状くさび７２、および第３分割くさび６０Ａに分割構成されている。 In the seventh embodiment, as shown in FIG. 31, the first lump wedge 70 is installed at the center in the axial direction of the slot 10 in place of the first split wedge 60, and the second lump wedge 72 is the second split wedge 65. The configuration is the same as that of the sixth embodiment except that it is installed at both ends in the axial direction of the slot 10 instead. In the seventh embodiment, the wedge is divided into a first lump wedge 70, a second lump wedge 72, and a third divided wedge 60A.
　第１塊状くさび７０は、導電性金属板６３と同様の高い導電性の材料、例えば銅又は銅合金で一塊に作製されている。傾斜面７１が、図３２に示されるように、第１塊状くさび７０の軸方向の両端面の下部側に形成されている。
　第２塊状くさび７２は、導電性金属板６３と同様の高い導電性の材料、例えば銅又は銅合金で一塊に作製されている。傾斜面７３が、図３３に示されるように、第２塊状くさび７２の軸方向の他端面の下部側に形成されている。 The first lump wedge 70 is made in one lump with a highly conductive material similar to that of the conductive metal plate 63, for example, copper or copper alloy. As shown in FIG. 32, the inclined surface 71 is formed on the lower side of both axial end surfaces of the first lump wedge 70.
The second lump wedge 72 is made of a highly conductive material similar to that of the conductive metal plate 63, such as copper or a copper alloy, in one lump. As shown in FIG. 33, the inclined surface 73 is formed on the lower side of the other end surface in the axial direction of the second massive wedge 72.
　この実施の形態７では、第１塊状くさび７０、第２塊状くさび７２、および第３分割くさび６０Ａの導電性金属板６３が、互いに電気的に接触する状態で軸方向に１列に配列されている。このように、互いに電気的に接触する状態で軸方向に１列に配列された第１塊状くさび７０、第２塊状くさび７２、および導電性金属板６３が、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。したがって、実施の形態７においても、上記実施の形態６と同様の効果が得られる。 In the seventh embodiment, the conductive metal plates 63 of the first massive wedge 70, the second massive wedge 72, and the third divided wedge 60A are arranged in a line in the axial direction in a state of being in electrical contact with each other. Yes. Thus, the first lump wedge 70, the second lump wedge 72, and the conductive metal plate 63 arranged in a line in the axial direction in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, in the seventh embodiment, the same effect as in the sixth embodiment can be obtained.
　また、第１塊状くさび７０および第２塊状くさび７２が、高い導電性の金属で塊状体に作製されているので、第１塊状くさび７０と回転子コア８との間の接触抵抗が低減され、第２塊状くさび７２と保持環９との間の接触抵抗が低減される。これにより、回転子コア８の表面に流れる渦電流をより多く、ダンパーバーとして機能する導電性金属板６３に流すことができる。その結果、渦電流による回転子コア８の発熱を抑制することができる。 Further, since the first lump wedge 70 and the second lump wedge 72 are made into a lump with a highly conductive metal, the contact resistance between the first lump wedge 70 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 72 and the retaining ring 9 is reduced. Thereby, more eddy currents flowing on the surface of the rotor core 8 can be supplied to the conductive metal plate 63 functioning as a damper bar. As a result, heat generation of the rotor core 8 due to eddy current can be suppressed.
　また、隣り合う第１塊状くさび７０と第３分割くさび６０Ａの導電性金属板６３の傾斜面７１，６４同士が、半径方向に重なって面接触状態となっている。隣り合う第３分割くさび６０Ａの導電性金属板６３の傾斜面６４同士が、半径方向に重なって面接触状態となっている。隣り合う第３分割くさび６０Ａの導電性金属板６３と第２塊状くさび７２との傾斜面６４，７３同士が、半径方向に重なって面接触となっている。そこで、回転子の回転中の遠心力により、これらの電気的接続部の接触面圧が上昇する。これにより、第１塊状くさび７０と第３分割くさび６０Ａの導電性金属板６３との電気的接続部、第３分割くさび６０Ａの導電性金属板６３同士の電気的接続部、さらに第３分割くさび６０Ａの導電性金属板６３と第２塊状くさび７２との電気的接続部の接触抵抗が減少し、接触部における発熱が抑制される。 Further, the inclined surfaces 71 and 64 of the conductive metal plate 63 of the adjacent first lump-like wedge 70 and the third divided wedge 60A overlap each other in the radial direction to form a surface contact state. The inclined surfaces 64 of the conductive metal plates 63 of the adjacent third divided wedges 60A overlap each other in the radial direction and are in a surface contact state. The inclined surfaces 64 and 73 of the conductive metal plate 63 and the second lump wedge 72 of the adjacent third divided wedge 60A overlap in the radial direction and are in surface contact. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor. Thereby, the electrical connection portion between the first lump wedge 70 and the conductive metal plate 63 of the third split wedge 60A, the electrical connection portion between the conductive metal plates 63 of the third split wedge 60A, and the third split wedge. The contact resistance of the electrical connection portion between the 60A conductive metal plate 63 and the second lump wedge 72 is reduced, and heat generation at the contact portion is suppressed.
　なお、上記実施の形態７において、第３分割くさび６０Ａに替えて、実施の形態４における第３分割くさび４０Ａの導電性金属板４３の露出面を傾斜面とした第３分割くさびを用いてもよい。 In the seventh embodiment, instead of the third divided wedge 60A, a third divided wedge having an exposed surface of the conductive metal plate 43 of the third divided wedge 40A in the fourth embodiment as an inclined surface may be used. Good.
　ここで、第１塊状くさび７０および第２塊状くさび７２の導電性金属板６３および保持環９との接触面に、第１塊状くさび７０および第２塊状くさび７２よりも高い導電性の金属、例えば金、銀などのメッキを施し、接触抵抗を低減してもよい。 Here, a conductive metal higher than the first lump wedge 70 and the second lump wedge 72 on the contact surface of the first lump wedge 70 and the second lump wedge 72 with the conductive metal plate 63 and the retaining ring 9, for example, The contact resistance may be reduced by plating with gold, silver or the like.
　実施の形態８．
　図３４は、この発明の実施の形８に係る回転電機における回転子のスロット周りを示す要部縦断面図、図３５は、この発明の実施の形態８に係る回転電機における回転子の第１塊状くさびを示す縦断面図、図３６は、この発明の実施の形態８に係る回転電機における回転子の第１塊状くさびを軸方向から見た端面図、図３７は、この発明の実施の形態８に係る回転電機における回転子の第２塊状くさびを示す縦断面図、図３８は、この発明の実施の形態８に係る回転電機における回転子の第２塊状くさびを軸方向から見た端面図、図３９は、この発明の実施の形態８に係る回転電機における回転子の第４分割くさびを示す縦断面図、図４０は、この発明の実施の形態８に係る回転電機における回転子の第４分割くさびを軸方向から見た端面図、図４１は、この発明の実施の形態８に係る回転電機における回転子のくさび間接続導体を示す縦断面図、図４２は、この発明の実施の形態８に係る回転電機における回転子のくさび間接続導体を軸方向から見た端面図である。 Embodiment 8 FIG.
FIG. 34 is a longitudinal sectional view of a main part showing the periphery of the rotor slot in the rotary electric machine according to Embodiment 8 of the present invention, and FIG. 35 is a first view of the rotor in the rotary electric machine according to Embodiment 8 of the present invention. FIG. 36 is a longitudinal sectional view showing the massive wedge, FIG. 36 is an end view of the first massive wedge of the rotor in the rotary electric machine according to Embodiment 8 of the present invention viewed from the axial direction, and FIG. 37 is an embodiment of the present invention. FIG. 38 is a longitudinal sectional view showing a second lump wedge of the rotor in the rotary electric machine according to FIG. 8, and FIG. 38 is an end view of the second lump wedge of the rotor in the rotary electric machine according to Embodiment 8 of the present invention as seen from the axial direction. FIG. 39 is a longitudinal sectional view showing a fourth divided wedge of the rotor in the rotary electric machine according to Embodiment 8 of the present invention, and FIG. 40 shows the fourth of the rotor in the rotary electric machine according to Embodiment 8 of the present invention. End view of the quadrant wedge as seen from the axial direction 41 is a longitudinal sectional view showing a connecting conductor between the wedges of a rotor in a rotary electric machine according to Embodiment 8 of the present invention. FIG. 42 is a view between the wedges of the rotor in the rotary electric machine according to Embodiment 8 of the present invention. It is the end elevation which looked at the connecting conductor from the axial direction.
　実施の形態８では、図３４に示されるように、第１塊状くさび７４がスロット１０の軸方向中央部に設置され、第２塊状くさび７６がスロット１０の軸方向両端部に設置されている。また、複数の第４分割クサビ７７が第１塊状くさび７４と第２塊状クサビ７６との間に軸方向に１列に設置されている。さらに、第１塊状くさび７４と第４分割くさび７７とが、第４分割くさび７７同士が、さらに、第４分割くさび７７と第２塊状くさび７６とが、くさび間接続導体７５を用いて接続されている。なお、他の構成は、上記実施の形態７と同様に構成されている。実施の形態８では、くさびは、第１塊状くさび７４、第２塊状くさび７６、および第４分割くさび７７に分割構成されている。 In the eighth embodiment, as shown in FIG. 34, the first lump wedge 74 is installed at the center in the axial direction of the slot 10, and the second lump wedge 76 is installed at both axial ends of the slot 10. A plurality of fourth divided wedges 77 are arranged in a line in the axial direction between the first massive wedge 74 and the second massive wedge 76. Furthermore, the first lump wedge 74 and the fourth split wedge 77 are connected to each other by the fourth split wedge 77, and the fourth split wedge 77 and the second lump wedge 76 are connected using the inter-wedge connection conductor 75. ing. Other configurations are the same as those in the seventh embodiment. In the eighth embodiment, the wedge is divided into a first massive wedge 74, a second massive wedge 76, and a fourth divided wedge 77.
　第１塊状くさび７４は、導電性金属板６３と同様の高い導電性の材料、例えば銅又は銅合金で一塊に作製されている。くぼみ７９が、図３５および図３６に示されるように、穴方向を軸方向として、第１塊状くさび７４の軸方向の両端面の下部側に形成されている。くぼみ７９は、軸方向と直交する断面を矩形とする穴形状を有し、くぼみ７９の上面がくぼみ７９の深さ方向に漸次下面側に近づく傾斜面７９ａとなっている。なお、第１塊状くさび７４は、くぼみ７９が形成されている点を除いて、第１塊状くさび７０と同様に構成されている。 The first lump wedges 74 are made in one lump with a highly conductive material similar to the conductive metal plate 63, for example, copper or copper alloy. As shown in FIG. 35 and FIG. 36, the recess 79 is formed on the lower side of both end faces in the axial direction of the first lump wedge 74 with the hole direction as the axial direction. The recess 79 has a hole shape in which a cross section orthogonal to the axial direction is rectangular, and the upper surface of the recess 79 is an inclined surface 79 a that gradually approaches the lower surface side in the depth direction of the recess 79. The first lump wedge 74 is configured in the same manner as the first lump wedge 70 except that the recess 79 is formed.
　第２塊状くさび７６は、導電性金属板６３と同様の高い導電性の材料、例えば銅又は銅合金で一塊に作製されている。くぼみ８０が、図３７および図３８に示されるように、第２塊状くさび７６の、第４分割くさび７７と相対する端面の下部側に形成されている。くぼみ８０は、軸方向と直交する断面を矩形とする穴形状を有し、くぼみ８０の上面がくぼみ８０の深さ方向に漸次下面側に近づく傾斜面８０ａとなっている。なお、第２塊状くさび７６は、くぼみ８０が形成されている点を除いて、第２塊状くさび７２と同様に構成されている。 The second lump wedges 76 are made in one lump with a highly conductive material similar to the conductive metal plate 63, for example, copper or copper alloy. As shown in FIGS. 37 and 38, the recess 80 is formed on the lower side of the end face of the second lump wedge 76 facing the fourth split wedge 77. The recess 80 has a hole shape in which a cross section orthogonal to the axial direction is a rectangle, and the upper surface of the recess 80 is an inclined surface 80 a that gradually approaches the lower surface side in the depth direction of the recess 80. The second lump wedge 76 is configured in the same manner as the second lump wedge 72 except that the recess 80 is formed.
　第４分割くさび７７は、図３９および図４０に示されるように、第４分割上くさび８１ろ、第４分割下くさび８２と、導電性金属板７８と、を備える複合くさびである。くぼみ８３が、第４分割下くさび８２の軸方向の両端面の下部側に形成されている。くぼみ８３は、軸方向と直交する断面を矩形とする穴形状を有し、くぼみ８３上面がくぼみ８３の深さ方向に漸次下面側に近づく傾斜面となっている。導電性金属板７８は、矩形平板状に作製され、軸方向両側に突出した状態で、第４分割上くさび８１と第４分割下くさび８２との間に挟み込まれる。導電性金属板７８の突出部は、第４分割下くさび８２の軸方向の両端面に沿って下方に延び、くぼみ８３内に引き入れられている。くぼみ８３内に引き入れられた導電性金属板７８は、くぼみ８３の傾斜面に沿って配置される。ここで、くぼみ８３の傾斜面に沿って配置された導電性金属板７８の部分の下面が傾斜面７８ａとなっている。第４分割上くさび８１および第４分割下くさび８２は、高強度の非磁性材、例えばステンレス鋼で作製されている。導電性金属板７８は、導電性金属板６３と同じ材料、例えば銅又は銅合金で作製される。 39 and 40, the fourth divided wedge 77 is a composite wedge including a fourth divided upper wedge 81, a fourth divided lower wedge 82, and a conductive metal plate 78. The recess 83 is formed on the lower side of both end faces in the axial direction of the fourth divided lower wedge 82. The recess 83 has a hole shape having a rectangular cross section orthogonal to the axial direction, and the upper surface of the recess 83 is an inclined surface that gradually approaches the lower surface side in the depth direction of the recess 83. The conductive metal plate 78 is formed in a rectangular flat plate shape, and is sandwiched between the fourth divided upper wedge 81 and the fourth divided lower wedge 82 in a state of projecting to both sides in the axial direction. The protruding portion of the conductive metal plate 78 extends downward along both axial end surfaces of the fourth divided lower wedge 82, and is drawn into the recess 83. The conductive metal plate 78 drawn into the recess 83 is disposed along the inclined surface of the recess 83. Here, the lower surface of the portion of the conductive metal plate 78 disposed along the inclined surface of the recess 83 is an inclined surface 78a. The fourth divided upper wedge 81 and the fourth divided lower wedge 82 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 78 is made of the same material as the conductive metal plate 63, for example, copper or a copper alloy.
　第１塊状くさび７４、第２塊状くさび７６、および第４分割くさび７７は、軸方向と直交する断面形状が同じである。くぼみ７９、くぼみ８０、および導電性金属板７８の端部が配置された状態のくぼみ８３は、同じ穴形状となっている。第１塊状くさび７４と第４分割くさび７７とは、くぼみ７９とくぼみ８３とが相対するように配置される。第２塊状くさび７６と第４分割くさび７７とは、くぼみ８０とくぼみ８３とが相対するように配置される。 The first lump wedge 74, the second lump wedge 76, and the fourth split wedge 77 have the same cross-sectional shape orthogonal to the axial direction. The recess 79, the recess 80, and the recess 83 in a state where the end portions of the conductive metal plate 78 are arranged have the same hole shape. The first lump wedge 74 and the fourth divided wedge 77 are arranged such that the recess 79 and the recess 83 face each other. The second lump wedge 76 and the fourth divided wedge 77 are arranged such that the recess 80 and the recess 83 are opposed to each other.
　第４分割くさび７７は、第４分割上くさび８１と第４分割下くさび８２とを一体化して構成される。ここで、一体化された第４分割上くさび８１と第４分割下くさび８２とが本体部となり、導電性金属板７８が通電体となる。 The fourth divided wedge 77 is configured by integrating a fourth divided upper wedge 81 and a fourth divided lower wedge 82. Here, the integrated fourth divided upper wedge 81 and the fourth divided lower wedge 82 serve as a main body portion, and the conductive metal plate 78 serves as a current-carrying body.
　くさび間接続導体７５は、導電性金属板７８と同じ材料、例えば銅又は銅合金で作製される。くさび間接続導体７５は、図４１および図４２に示されるように、軸方向両端部がくぼみ７９、くぼみ８０、および導電性金属板７８の端部が配置された状態のくぼみ８３と嵌合可能な形状に形成されている。くさび間接続導体７５の軸方向両端部の上面が、くぼみ７９、くぼみ８０、および導電性金属板７８の端部が配置された状態のくぼみ８３の傾斜面７９ａ，８０ａ，７８ａに半径方向に重なった状態で面接触する傾斜面７５ａとなる。 The wedge connecting conductor 75 is made of the same material as the conductive metal plate 78, for example, copper or a copper alloy. As shown in FIGS. 41 and 42, the inter-wedge connecting conductor 75 can be fitted into a recess 83 in which both ends in the axial direction are the recess 79, the recess 80, and the end of the conductive metal plate 78. It is formed in a simple shape. The upper surfaces of both end portions in the axial direction of the connection conductor 75 between the wedges overlap the inclined surfaces 79a, 80a, 78a of the recess 83 in a state where the recess 79, the recess 80, and the end portion of the conductive metal plate 78 are disposed. It becomes the inclined surface 75a which carries out surface contact in the state.
　このように構成された第１塊状くさび７４、第２塊状クサビ７６、第４分割クサビ７７は、くさび間接続導体７５を介在させてスロット１０内に軸方向に１列に設置される。このとき、くさび間接続導体７５の両端部がくぼみ７９，８０および８３に嵌合させている。そこで、くさび間接続導体７５の軸方向両端部の上面である傾斜面７５ａは、くぼみ７９，８０および８３傾斜面７９ａ，８０ａ，７８ａと半径方向に重なって面接触状態となっている。これにより、スロット１０内に１列に配列された第１塊状くさび７４、第２塊状クサビ７６および第４分割クサビ７７が電気的に接続状態となっている。 The first lump wedges 74, the second lump wedges 76, and the fourth split wedges 77 thus configured are arranged in a row in the axial direction in the slot 10 with the inter-wedge connection conductors 75 interposed therebetween. At this time, both ends of the inter-wedge connection conductor 75 are fitted in the recesses 79, 80 and 83. Accordingly, the inclined surfaces 75a, which are the upper surfaces of both end portions in the axial direction of the inter-wedge connection conductor 75, are in surface contact with the recesses 79, 80 and the 83 inclined surfaces 79a, 80a, 78a in the radial direction. As a result, the first lump wedges 74, the second lump wedges 76, and the fourth divided wedges 77 arranged in a row in the slot 10 are electrically connected.
　この実施の形態８では、第１塊状くさび７４、第２塊状くさび７６、および第４分割くさび７７の導電性金属板７８が、くさび間接続導体７５により互いに電気的に接触する状態で軸方向に１列に配列されている。このように、互いに電気的に接触する状態で軸方向に１列に配列された第１塊状くさび７４、第２塊状くさび７６、および導電性金属板７８が、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。したがって、実施の形態８においても、上記実施の形態７と同様の効果が得られる。 In the eighth embodiment, the conductive metal plates 78 of the first massive wedge 74, the second massive wedge 76, and the fourth divided wedge 77 are in the axial direction in a state of being in electrical contact with each other by the inter-wedge connecting conductor 75. It is arranged in one row. As described above, the first lump wedge 74, the second lump wedge 76, and the conductive metal plate 78 arranged in a line in the axial direction in electrical contact with each other function as the damper bar 13, and the damper bar 13 can be omitted. Therefore, in the eighth embodiment, the same effect as in the seventh embodiment can be obtained.
　また、第１塊状くさび７４および第２塊状くさび７６が、高い導電性の金属で塊状体に作製されているので、第１塊状くさび７４と回転子コア８との間の接触抵抗が低減され、第２塊状くさび７６と保持環９との間の接触抵抗が低減される。これにより、回転子コア８の表面に流れる渦電流をより多く、ダンパーバーとして機能する導電性金属板７８に流すことができる。その結果、渦電流による回転子コア８の発熱を抑制することができる。 In addition, since the first massive wedge 74 and the second massive wedge 76 are made of a highly conductive metal into a massive body, the contact resistance between the first massive wedge 74 and the rotor core 8 is reduced, The contact resistance between the second massive wedge 76 and the retaining ring 9 is reduced. Thereby, more eddy currents flowing on the surface of the rotor core 8 can be supplied to the conductive metal plate 78 functioning as a damper bar. As a result, heat generation of the rotor core 8 due to eddy current can be suppressed.
　また、第１塊状くさび７４に形成されたくぼみ７９の内壁面の上面が、くぼみ７９の深さ方向に漸次内径側に変位する傾斜面７９ａとなっている。第２塊状くさび７６に形成されたくぼみ８０の内壁面の上面が、くぼみ８０の深さ方向に漸次内径側に変位する傾斜面８０ａとなっている。第４分割クサビ７７に形成されたくぼみ８３の内壁面の上面に配置された導電性金属板７８の下面が、くぼみ８３の深さ方向に漸次内径側に変位する傾斜面７８ａとなっている。くさび間接続導体７５の軸方向両端部が、くぼみ７９、８０および８３に嵌合され、傾斜面７５ａが傾斜面７９ａ，８０ａ，７８ａに半径方向に重なって面接触状態となっている。そこで、回転子６の回転中の遠心力により、これらの電気的接続部の接触面圧が上昇する。これにより、第１塊状くさび７４とくさび間接続導体７５との電気的接続部、第４分割くさび７７の導電性金属板７８とくさび間接続導体７５との電気的接続部、および第２塊状くさび７６とくさび間接続導体７５との電気的接続部の接触抵抗が減少し、接触部における発熱が抑制される。 Further, the upper surface of the inner wall surface of the recess 79 formed in the first lump wedge 74 is an inclined surface 79 a that gradually displaces toward the inner diameter side in the depth direction of the recess 79. The upper surface of the inner wall surface of the recess 80 formed in the second lump wedge 76 forms an inclined surface 80a that gradually displaces toward the inner diameter side in the depth direction of the recess 80. The lower surface of the conductive metal plate 78 disposed on the upper surface of the inner wall surface of the recess 83 formed in the fourth split wedge 77 forms an inclined surface 78 a that gradually displaces toward the inner diameter side in the depth direction of the recess 83. Both end portions in the axial direction of the connecting conductor 75 between the wedges are fitted into the recesses 79, 80, and 83, and the inclined surface 75a overlaps the inclined surfaces 79a, 80a, and 78a in the radial direction to form a surface contact state. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor 6. Accordingly, the electrical connection portion between the first lump wedge 74 and the inter-wedge connection conductor 75, the electrical connection portion between the conductive metal plate 78 of the fourth split wedge 77 and the inter-wedge connection conductor 75, and the second lump wedge. The contact resistance of the electrical connection portion between 76 and the inter-wedge connection conductor 75 is reduced, and heat generation at the contact portion is suppressed.
　なお、上記実施の形態８において、第４分割くさび７７に替えて、実施の形態４における第３分割くさび４０Ａの導電性金属板４３の露出面に傾斜したくぼみ設けた第３分割くさびを用いてもよい。 In the eighth embodiment, instead of the fourth divided wedge 77, a third divided wedge provided with an inclined recess on the exposed surface of the conductive metal plate 43 of the third divided wedge 40A in the fourth embodiment is used. Also good.
　ここで、第１塊状くさび７４のくさび間接続導体７５との接触面、第２塊状くさび７６のくさび間接続導体７５との接触面、および第２塊状くさび７６の保持環９との接触面に、第１塊状くさび７４および第２塊状くさび７６よりも高い導電性の金属、例えば金、銀などのメッキを施し、接触抵抗を低減してもよい。また、第４分割くさび７７の導電性金属板８５のくさび間接続導体７５との接触面に、導電性金属板８５よりも高い導電性の金属、例えば金、銀などのメッキを施し、接触抵抗を低減してもよい。 Here, the contact surface of the first massive wedge 74 with the inter-wedge connection conductor 75, the contact surface of the second massive wedge 76 with the inter-wedge connection conductor 75, and the contact surface with the holding ring 9 of the second massive wedge 76 are provided. The contact resistance may be reduced by plating with a conductive metal that is higher than the first massive wedge 74 and the second massive wedge 76, such as gold or silver. Further, the contact surface of the conductive metal plate 85 of the fourth divided wedge 77 with the inter-wedge connection conductor 75 is plated with a conductive metal higher than the conductive metal plate 85, for example, gold, silver, etc. May be reduced.
　実施の形態９．
　図４３は、この発明の実施の形態９に係る回転電機における回転子のスロット周りを示す要部縦断面図、図４４は、この発明の実施の形態９に係る回転電機における回転子の第５分割くさびを示す縦断面図、図４５は、この発明の実施の形態９に係る回転電機における回転子の第５分割くさびを軸方向から見た端面図である。 Embodiment 9 FIG.
FIG. 43 is a longitudinal sectional view of the main part showing the periphery of the slot of the rotor in the rotary electric machine according to Embodiment 9 of the present invention, and FIG. 44 shows the fifth aspect of the rotor in the rotary electric machine according to Embodiment 9 of the present invention. FIG. 45 is a longitudinal sectional view showing the divided wedge, and FIG. 45 is an end view of the fifth divided wedge of the rotor in the rotary electric machine according to Embodiment 9 of the present invention as seen from the axial direction.
　実施の形態９では、図４３に示されるように、第４分割くさび７７がスロット１０の軸方向中央部に設置され、第５分割くさび８４がスロット１０の軸方向両端部に設置されている。さらに、複数の第４分割くさび７７が、中央部に設置された第４分割くさび７７と両端部に設置された第５分割くさび８４との間に設置されている。第４分割くさび７７同士がくさび間接続導体７５により電気的に接続され、第４分割くさび７７と第５分割くさび８４とがくさび間接続導体７５により電気的に接続されている。なお、他の構成は、上記実施の形態８と同様に構成されている。実施の形態９では、くさびは、第４分割くさび７７および第５分割くさび８４に分割構成されている。 In the ninth embodiment, as shown in FIG. 43, the fourth divided wedge 77 is installed at the center in the axial direction of the slot 10, and the fifth divided wedge 84 is installed at both axial ends of the slot 10. Further, a plurality of fourth divided wedges 77 are installed between a fourth divided wedge 77 installed at the center and fifth divided wedges 84 installed at both ends. The fourth divided wedges 77 are electrically connected by the inter-wedge connecting conductor 75, and the fourth divided wedge 77 and the fifth divided wedge 84 are electrically connected by the inter-wedge connecting conductor 75. Other configurations are the same as those in the eighth embodiment. In the ninth embodiment, the wedge is divided into a fourth divided wedge 77 and a fifth divided wedge 84.
　第５分割くさび８４は、図４４および図４５に示されるように、第５分割上くさび８８と、第５分割下くさび８７と、導電性金属板８５と、を備える複合くさびである。くぼみ８６が、第５分割下くさび８７の、第４分割くさび７７と相対する端面の下部側に形成されている。くぼみ８６は、軸方向と直交する断面を矩形とする穴形状を有し、くぼみ８６上面がくぼみ８６の深さ方向に漸次下面側に近づく傾斜面となっている。導電性金属板８５は、矩形平板状に作製され、軸方向両側に突出した状態で、第５分割上くさび８８と第５分割下くさび８７との間に挟み込まれる。導電性金属板８５の一方の突出部は、第５分割下くさび８７の端面に沿って下方に延び、くぼみ８６内に引き入れられている。くぼみ８６内に引き入れられた導電性金属板８５は、くぼみ８６の傾斜面に沿って配置される。ここで、くぼみ８６の傾斜面に沿って配置された導電性金属板８５の部分の下面が傾斜面８５ａとなっている。第５分割上くさび８８および第５分割下くさび８７は、高強度の非磁性材、例えばステンレス鋼で作製されている。導電性金属板８５は、導電性金属板６３と同じ材料、例えば銅又は銅合金で作製される。なお、第５分割くさび８４の保持環９との電気的接続部は、第２分割くさび４５と同様に構成されている。 44 and 45, the fifth divided wedge 84 is a composite wedge including a fifth divided upper wedge 88, a fifth divided lower wedge 87, and a conductive metal plate 85. A recess 86 is formed on the lower side of the end face of the fifth divided lower wedge 87 facing the fourth divided wedge 77. The indentation 86 has a hole shape in which a cross section perpendicular to the axial direction is rectangular, and the upper surface of the indentation 86 is an inclined surface that gradually approaches the lower surface side in the depth direction of the indentation 86. The conductive metal plate 85 is formed in a rectangular flat plate shape, and is sandwiched between the fifth divided upper wedge 88 and the fifth divided lower wedge 87 in a state of protruding in the axial direction. One projecting portion of the conductive metal plate 85 extends downward along the end surface of the fifth divided lower wedge 87 and is drawn into the recess 86. The conductive metal plate 85 drawn into the recess 86 is disposed along the inclined surface of the recess 86. Here, the lower surface of the portion of the conductive metal plate 85 disposed along the inclined surface of the recess 86 is an inclined surface 85a. The fifth divided upper wedge 88 and the fifth divided lower wedge 87 are made of a high-strength nonmagnetic material such as stainless steel. The conductive metal plate 85 is made of the same material as the conductive metal plate 63, for example, copper or a copper alloy. The electrical connection portion of the fifth divided wedge 84 with the holding ring 9 is configured in the same manner as the second divided wedge 45.
　第４分割くさび７７および第５分割くさび８４は、軸方向と直交する断面形状が同じである。導電性金属板７８の端部が配置された状態のくぼみ８３と導電性金属板８５の端部が配置された状態のくぼみ８６は、同じ穴形状となっている。第４分割くさび７７同士は、くぼみ８３が相対するように配置される。第４分割くさび７７と第５分割くさび８４とは、くぼみ８３とくぼみ８６とが相対するように配置される。 The fourth split wedge 77 and the fifth split wedge 84 have the same cross-sectional shape orthogonal to the axial direction. The recess 83 in a state where the end portion of the conductive metal plate 78 is disposed and the recess 86 in a state where the end portion of the conductive metal plate 85 is disposed have the same hole shape. The fourth divided wedges 77 are arranged so that the recesses 83 face each other. The fourth divided wedge 77 and the fifth divided wedge 84 are arranged such that the recess 83 and the recess 86 face each other.
　第５分割くさび８４は、第５分割上くさび８８と第５分割下くさび８７とを一体化して構成される。ここで、一体化された第５分割上くさび８８と第５分割下くさび８７とが本体部となり、導電性金属板８５が通電体となる。 The fifth divided wedge 84 is configured by integrating a fifth divided upper wedge 88 and a fifth divided lower wedge 87. Here, the integrated fifth divided upper wedge 88 and the fifth divided lower wedge 87 serve as a main body portion, and the conductive metal plate 85 serves as a current-carrying body.
　この実施の形態９では、第４分割くさび７７の導電性金属板７８同士、および第４分割くさび７７の導電性金属板７８と第５分割くさび８４の導電性金属板８５とが、くさび間接続導体７５により互いに電気的に接触する状態で軸方向に１列に配列されている。このように、互いに電気的に接触する状態で軸方向に１列に配列された第４分割くさび７７の導電性金属板７８および第５分割くさび８４の導電性金属板８５が、ダンパーバー１３として機能し、ダンパーバー１３を省略することができる。したがって、実施の形態９においても、上記実施の形態８と同様の効果が得られる。 In the ninth embodiment, the conductive metal plates 78 of the fourth divided wedge 77 and the conductive metal plates 78 of the fourth divided wedge 77 and the conductive metal plate 85 of the fifth divided wedge 84 are connected between the wedges. The conductors 75 are arranged in a line in the axial direction so as to be in electrical contact with each other. Thus, the conductive metal plate 78 of the fourth divided wedge 77 and the conductive metal plate 85 of the fifth divided wedge 84 arranged in a line in the axial direction in a state of being in electrical contact with each other are used as the damper bar 13. It functions and the damper bar 13 can be omitted. Therefore, in the ninth embodiment, the same effect as in the eighth embodiment can be obtained.
　また、第４分割クサビ７７に形成されたくぼみ８３の内壁面の上面に配置された導電性金属板７８の下面が、くぼみ８３の深さ方向に漸次内径側に変位する傾斜面７８ａとなっている。第５分割クサビ８４に形成されたくぼみ８６の内壁面の上面に配置された導電性金属板８５の下面が、くぼみ８６の深さ方向に漸次内径側に変位する傾斜面８５ａとなっている。くさび間接続導体７５の軸方向両端部が、くぼみ８３および８６に嵌合され、傾斜面７５ａが傾斜面７８ａ，８５ａに半径方向に重なって面接触状態となっている。そこで、回転子６の回転中の遠心力により、これらの電気的接続部の接触面圧が上昇する。これにより、第４分割くさび７７の導電性金属板７８とくさび間接続導体７５との電気的接続部、および第５分割くさび８４の導電性金属板８５とくさび間接続導体７５との電気的接続部の接触抵抗が減少し、接触部における発熱が抑制される。 In addition, the lower surface of the conductive metal plate 78 disposed on the upper surface of the inner wall surface of the recess 83 formed in the fourth divided wedge 77 forms an inclined surface 78 a that gradually displaces toward the inner diameter side in the depth direction of the recess 83. Yes. The lower surface of the conductive metal plate 85 disposed on the upper surface of the inner wall surface of the recess 86 formed in the fifth divided wedge 84 forms an inclined surface 85 a that gradually displaces toward the inner diameter side in the depth direction of the recess 86. Both end portions in the axial direction of the connecting conductor 75 between the wedges are fitted into the recesses 83 and 86, and the inclined surface 75a overlaps the inclined surfaces 78a and 85a in the radial direction to be in a surface contact state. Therefore, the contact surface pressure of these electrical connection portions increases due to the centrifugal force during rotation of the rotor 6. Thereby, the electrical connection between the conductive metal plate 78 of the fourth split wedge 77 and the inter-wedge connection conductor 75 and the electrical connection between the conductive metal plate 85 of the fifth split wedge 84 and the inter-wedge connection conductor 75. The contact resistance of the contact portion is reduced, and heat generation at the contact portion is suppressed.
　なお、上記実施の形態９において、第４分割くさび７７に替えて、実施の形態４における第３分割くさび４０Ａの導電性金属板４３の露出面に傾斜したくぼみ設けた第３分割くさびを用いてもよい。 In the ninth embodiment, instead of the fourth divided wedge 77, a third divided wedge provided with an inclined recess on the exposed surface of the conductive metal plate 43 of the third divided wedge 40A in the fourth embodiment is used. Also good.
　ここで、第４分割クサビ７７の導電性金属板７８のくさび間接続導体７５との接触面、第５分割くさび８４の導電性金属板８５のくさび間接続導体７５との接触面、および第５分割くさび８４の導電性金属板８５の保持環９との接触面に、導電性金属板７８、８５よりも高い導電性の金属、例えば金、銀などのメッキを施し、接触抵抗を低減してもよい。 Here, the contact surface of the conductive metal plate 78 of the fourth divided wedge 77 with the inter-wedge connection conductor 75, the contact surface of the conductive metal plate 85 of the fifth divided wedge 84 with the inter-wedge connection conductor 75, and the fifth The contact surface of the divided wedge 84 with the holding ring 9 of the conductive metal plate 85 is plated with a conductive metal higher than the conductive metal plates 78 and 85, such as gold and silver, to reduce the contact resistance. Also good.
　なお、上記各実施の形態では、発電機について説明されているが、本発明は、発電機に限定されず、電動機、発電電動機などの回転電機に適用できる。 In each of the above embodiments, the generator has been described. However, the present invention is not limited to the generator, and can be applied to rotating electric machines such as an electric motor and a generator motor.
　３　電機子、５　電機子巻線、６　回転子、８　回転子コア、９　保持環、１０　スロット、１１　界磁巻線、１８　第３分割くさび、３０，４０，６０　第１分割くさび（複合くさび）、３０Ａ，４０Ａ，６０Ａ　第３分割くさび（複合くさび）、３１，４１，６１　第１分割上くさび（本体部）、３２，４２，６２　第１分割下くさび（本体部）、３３，４３，４８，６３，７８，８５　導電性金属板（通電体）、３５，４５，６５　第２分割くさび（複合くさび）、３６，４６，６６　第２分割上くさび（本体部）、３７，４７，６７　第２分割下くさび（本体部）、３８ａ，６８ａ　第１導電性金属板（通電体）、３８ｂ，６８ｂ　第２導電性金属板（通電体）、５０，７０，７４　第１塊状くさび（分割くさび）、５１，７２，７６　第２塊状くさび（分割くさび）、６４，６９，７５ａ，７８ａ，７９ａ，８０ａ，８５ａ　傾斜面、７５　くさび間接続導体、７７　第４分割くさび（複合くさび）、８１　第１分割上くさび（本体部）、８２　第１分割下くさび（本体部）、８４　第５分割くさび（複合くさび）、８７　第２分割上くさび（本体部）、８８　第１分割下くさび（本体部）。 3 armatures, 5 armature windings, 6 rotors, 8 rotor cores, 9 retaining rings, 10 slots, 11 field windings, 18 third split wedges, 30, 40, 60 first split wedges (composite wedges) ), 30A, 40A, 60A Third split wedge (composite wedge), 31, 41, 61 First split upper wedge (main part), 32, 42, 62 First split lower wedge (main part), 33, 43, 48, 63, 78, 85 Conductive metal plate (electrical conductor), 35, 45, 65 Second split wedge (composite wedge), 36, 46, 66 Second split upper wedge (main part), 37, 47, 67 2nd split lower wedge (main part), 38a, 68a 1st conductive metal plate (current carrying body), 38b, 68b 2nd conductive metal plate (current carrying body), 50, 70, 74 1st block wedge (split wedge) ), 51, 72, 6 2nd lump wedge (divided wedge), 64, 69, 75a, 78a, 79a, 80a, 85a inclined surface, 75 wedge connecting conductor, 77 4th divided wedge (composite wedge), 81 1st divided upper wedge (main body) Part), 82 1st divided lower wedge (main part), 84 5th divided wedge (composite wedge), 87 2nd divided upper wedge (main part), 88 1st divided lower wedge (main part).

Claims (16)

  1. 　電機子巻線（５）を備える電機子（３）と、
    　上記電機子の内径側に配置された回転子（６）と、を備え、
    　上記回転子は、半径方向外方に開口し、かつ軸方向に延びるスロット（１０）が周方向に複数形成された回転子コア（８）と、上記スロットのそれぞれに収納された界磁巻線（１１）と、上記スロットのそれぞれの開口側に軸方向に配列して収納され、上記界磁巻線を上記スロット内に固定保持する複数の分割くさび（１８，３０，３０Ａ，３５，４０，４０Ａ，４５，５０，５１，６０，６０Ａ，６５，７０，７２，７４，７６，７７，８４）と、上記回転子コアの軸方向両端部に装着された保持環（９）と、を含み、
    　上記複数の分割くさびは、複合くさび（３０，３０Ａ，３５，４０，４０Ａ，４５，６０，６０Ａ，６５，７７，８４）を含み、
    　上記複合くさび（３０，３０Ａ，３５，４０，４０Ａ，４５，６０，６０Ａ，６５，７７，８４）は、上記界磁巻線（１１）を保持する本体部（３１，３２，３６，３７，４１，４２，４６，４７，６１，６２，６６，６７）と、上記本体部（３１，３２，３６，３７，４１，４２，４６，４７，６１，６２，６６，６７）に保持され、渦電流が流れる通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）と、を備え、
    　上記本体部（３１，３２，３６，３７，４１，４２，４６，４７，６１，６２，６６，６７）は、上記通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）より高強度の非磁性材で作製され、
    　上記通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）は、上記本体部（３１，３２，３６，３７，４１，４２，４６，４７，６１，６２，６６，６７）より高導電性の金属で作製されている回転電機。     An armature (3) comprising an armature winding (5);
    A rotor (6) disposed on the inner diameter side of the armature,
    The rotor includes a rotor core (8) having a plurality of slots (10) extending in the radial direction and opening radially outward, and a field winding housed in each of the slots. (11), and a plurality of split wedges (18, 30, 30A, 35, 40,...) That are housed in an axial arrangement on each opening side of the slot and that hold the field winding in the slot. 40A, 45, 50, 51, 60, 60A, 65, 70, 72, 74, 76, 77, 84), and holding rings (9) mounted on both axial ends of the rotor core. ,
    The plurality of divided wedges include composite wedges (30, 30A, 35, 40, 40A, 45, 60, 60A, 65, 77, 84),
    The composite wedge (30, 30A, 35, 40, 40A, 45, 60, 60A, 65, 77, 84) has a main body (31, 32, 36, 37, 37) that holds the field winding (11). 41, 42, 46, 47, 61, 62, 66, 67) and the main body (31, 32, 36, 37, 41, 42, 46, 47, 61, 62, 66, 67), An electrical current (33, 38a, 38b, 43, 48, 63, 68a, 68b, 78, 85) through which eddy current flows,
    The main body (31, 32, 36, 37, 41, 42, 46, 47, 61, 62, 66, 67) is connected to the current-carrying body (33, 38a, 38b, 43, 48, 63, 68a, 68b, 78, 85) made of a nonmagnetic material with higher strength,
    The current-carrying bodies (33, 38a, 38b, 43, 48, 63, 68a, 68b, 78, 85) are connected to the body portions (31, 32, 36, 37, 41, 42, 46, 47, 61, 62, 66, 67) A rotating electrical machine made of a metal having higher conductivity.
  2. 　上記複合くさび（３０，３５，４０，４５）は、上記スロット（１０）のそれぞれの軸方向中央部と軸方向両端部とのみに収納され、
    軸方向中央部と軸方向両端部とのみに収納されている上記複合くさび（３０，３５，４０，４５）を電気的に接続するダンパーバー（１３）をさらに備えている請求項１記載の回転電機。     The composite wedge (30, 35, 40, 45) is housed only in the axial center and axial ends of the slot (10),
    The rotation according to claim 1, further comprising a damper bar (13) for electrically connecting the composite wedges (30, 35, 40, 45) accommodated only in the axially central part and the axially opposite ends. Electric.
  3. 　上記本体部は、分割上くさび（３１，３６，４１，４６）と、分割下くさび（３２，３７，４２，４７）と、を備え、
    　上記通電体（３３，３８ａ，３８ｂ，４３，４８）は、上記分割上くさび３１，３６，４１，４６）と上記分割下くさび（３２，３７，４２，４７）との間に挟まれて保持され、
    　上記通電体（３３，３８ａ，３８ｂ，４３，４８）の上記本体部（３１，３２，３６，３７，４１，４２，４６，４７）からの突出部が、上記ダンパーバー（１３）と面接触している請求項２記載の回転電機。     The main body includes a split upper wedge (31, 36, 41, 46) and a split lower wedge (32, 37, 42, 47),
    The current-carrying body (33, 38a, 38b, 43, 48) is sandwiched and held between the divided upper wedges 31, 36, 41, 46) and the divided lower wedges (32, 37, 42, 47). And
    Projections from the main body (31, 32, 36, 37, 41, 42, 46, 47) of the current-carrying body (33, 38a, 38b, 43, 48) are in surface contact with the damper bar (13). The rotating electrical machine according to claim 2.
  4. 　上記複合くさび（３０，３５，４０，４５）は、上記スロット（１０）のそれぞれの軸方向中央部と軸方向両端部とのみに収納されている請求項１記載の回転電機。 The rotating electrical machine according to claim 1, wherein the composite wedge (30, 35, 40, 45) is accommodated only in the axial center and the axial both ends of the slot (10).
  5. 　上記複数の分割くさびの全てが、上記複合くさび（３０，３０Ａ，３５，４０，４０Ａ，４５，６０，６０Ａ，６５，７７，８４）であり、
    　上記複合くさび（３０，３０Ａ，３５，４０，４０Ａ，４５，６０，６０Ａ，６５，７７，８４）は、上記通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）が互いに電気的に接続された状態で上記スロット（１０）のそれぞれに軸方向に１列に配列して収納されている請求項１記載の回転電機。     All of the plurality of divided wedges are the composite wedges (30, 30A, 35, 40, 40A, 45, 60, 60A, 65, 77, 84),
    The composite wedge (30, 30A, 35, 40, 40A, 45, 60, 60A, 65, 77, 84) is connected to the current-carrying body (33, 38a, 38b, 43, 48, 63, 68a, 68b, 78, The rotating electrical machine according to claim 1, wherein 85) are electrically connected to each other and are accommodated in a row in the axial direction in each of the slots (10).
  6. 　上記複数の分割くさびは、上記スロット（１０）のそれぞれの軸方向中央部と軸方向両端部に収納されている、上記本体部（３１，３２）より高導電性の金属で作製された塊状くさび（５０，５１，７０，７２，７４，７６）と、上記スロット（１０）のそれぞれの軸方向中央部と軸方向両端部を除いて収納されている上記複合くさび（６０Ａ，７７）と、を備え、
    　上記塊状くさび（５０，５１，７０，７２，７４，７６）と上記複合くさび（６０Ａ，７７）は、上記塊状くさび（５０，５１，７０，７２，７４，７６）および上記通電体（６３，７８）が互いに電気的に接続された状態で上記スロットのそれぞれに軸方向に１列に配列して収納されている請求項１記載の回転電機。     The plurality of divided wedges are bulky wedges made of a metal having higher conductivity than the main body portions (31, 32), which are housed in the axial central portion and both axial end portions of the slot (10). (50, 51, 70, 72, 74, 76) and the composite wedges (60A, 77) housed except for the axial center and the axial ends of the slot (10). Prepared,
    The massive wedge (50, 51, 70, 72, 74, 76) and the composite wedge (60A, 77) are composed of the massive wedge (50, 51, 70, 72, 74, 76) and the current-carrying body (63, 78) The rotating electrical machine according to claim 1, wherein 78) are housed in an array in an axial direction in each of the slots in a state of being electrically connected to each other.
  7. 　上記複数の分割くさび（６０，６０Ａ，６５）の隣接する分割くさび同士の電気的接続部が、半径方向に重なった状態で面接触する傾斜面（６４，６９）に構成されている請求項４から請求項６のいずれか１項に記載の回転電機。 5. The electrical connection portion between the adjacent divided wedges of the plurality of divided wedges (60, 60 A, 65) is configured as an inclined surface (64, 69) in surface contact with each other in a state of overlapping in the radial direction. The rotating electrical machine according to claim 6.
  8. 　隣り合う上記複合くさび（７７，８４）の間のそれぞれに配置されたくさび間接続導体（７５）をさらに備え、
    　上記複合くさび（７７，８４）の上記通電体（７８，８５）と上記くさび間接続導体（７５）との電気的接続部のそれぞれが、半径方向に重なった状態で面接触する傾斜面（７５ａ，７８ａ，８５ａ）に構成されている請求項５記載の回転電機。     A wedge connecting conductor (75) disposed between each of the adjacent composite wedges (77, 84);
    An inclined surface (75a) in which the electrical connection portions of the current-carrying body (78, 85) of the composite wedge (77, 84) and the inter-wedge connecting conductor (75) are in surface contact with each other in a state of overlapping in the radial direction. 78a, 85a).
  9. 　隣り合う上記塊状くさび（７４，７６）と上記複合くさび（７７）との間、および隣り合う上記複合くさび（７７）の間のそれぞれに配置されたくさび間接続導体（７５）をさらに備え、
    　上記塊状くさび（７４，７６）と上記くさび間接続導体（７５）との電気的接続部、および上記複合くさび（７７）の上記通電体（７８）と上記くさび間接続導体（７５）との電気的接続部のそれぞれが、半径方向に重なった状態で面接触する傾斜面（７５ａ，７８ａ，７９ａ，８０ａ）に構成されている請求項６記載の回転電機。     A wedge connecting conductor (75) disposed between the adjacent wedges (74, 76) and the composite wedge (77) and between the adjacent composite wedges (77);
    Electrical connection between the massive wedges (74, 76) and the inter-wedge connection conductor (75), and electrical connection between the current-carrying body (78) of the composite wedge (77) and the inter-wedge connection conductor (75) The rotating electrical machine according to claim 6, wherein each of the mechanical connection portions is formed on an inclined surface (75a, 78a, 79a, 80a) in surface contact with each other in a state of overlapping in the radial direction.
  10. 　上記本体部は、分割上くさび（３１，３６，４１，４６，６１，６６，８１，８８）と、分割下くさび（３２，３７，４２，４７，６２，６７，８２，８７）と、を備え、
    　上記複合くさび（３０，３０Ａ，３５，４０，４０Ａ，４５，６０，６０Ａ，６５，７７，８４）は、上記通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）が上記分割上くさび（３０，３０Ａ，３５，４０，４０Ａ，４５，６０，６０Ａ，６５，８１，８８）と上記分割下くさび（３２，３７，４２，４７，６２，６７，８２，８７）との間に挟まれて保持された状態で、上記分割上くさびと上記分割下くさびとを一体化して構成されている請求項１および請求項４から請求項９のいずれか１項に記載の回転電機。     The main body includes a divided upper wedge (31, 36, 41, 46, 61, 66, 81, 88) and a divided lower wedge (32, 37, 42, 47, 62, 67, 82, 87). Prepared,
    The composite wedge (30, 30A, 35, 40, 40A, 45, 60, 60A, 65, 77, 84) is connected to the current-carrying body (33, 38a, 38b, 43, 48, 63, 68a, 68b, 78, 85) is the above divided upper wedge (30, 30A, 35, 40, 40A, 45, 60, 60A, 65, 81, 88) and the above divided lower wedge (32, 37, 42, 47, 62, 67, 82, 87), and the divided upper wedge and the divided lower wedge are integrated to each other. The rotating electrical machine described.
  11. 　溝方向を軸方向とする凹部（４１ａ，４６ａ）が上記分割上くさび（４１，４６）の下面に形成され、軸方向に延びる凸部（４２ａ，４７ａ）が上記分割下くさび（４２，４７）の上面に形成されており、
    　上記分割上くさび（４１，４６）と上記分割下くさび（４２，４７）は、上記凹部（４１ａ，４６ａ）と上記凸部（４２ａ，４７ａ）とが嵌合され、かつ上記通電体（４３，４８）が上記凹部（４１ａ，４６ａ）と上記凸部（４２ａ，４７ａ）との間に挟まれて保持された状態で一体化されている請求項１０記載の回転電機。     Concave portions (41a, 46a) whose axial direction is the groove direction are formed on the lower surface of the divided upper wedge (41, 46), and convex portions (42a, 47a) extending in the axial direction are formed on the divided lower wedge (42, 47). Formed on the top surface of
    The divided upper wedges (41, 46) and the divided lower wedges (42, 47) are configured such that the concave portions (41a, 46a) and the convex portions (42a, 47a) are fitted, and the current-carrying bodies (43, The rotating electrical machine according to claim 10, wherein 48) is integrated in a state of being sandwiched and held between the concave portion (41a, 46a) and the convex portion (42a, 47a).
  12. 　上記通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）よりも高い導電性の金属が、上記通電体（３３，３８ａ，３８ｂ，４３，４８，６３，６８ａ，６８ｂ，７８，８５）の他の部材との電気的接続部に被覆されている請求項２から請求項１１のいずれか１項に記載の回転電機。 A conductive metal higher than the current-carrying body (33, 38a, 38b, 43, 48, 63, 68a, 68b, 78, 85) is used for the current-carrying body (33, 38a, 38b, 43, 48, 63, 68a). , 68b, 78, 85) The rotating electrical machine according to any one of claims 2 to 11, which is covered with an electrical connection portion with another member.
  13. 　上記塊状くさび（５０，５１，７０，７２，７４，７６）よりも高い導電性の金属が、上記塊状くさび（５０，５１，７０，７２，７４，７６）の他の部材との電気的接続部に被覆されている請求項６記載の回転電機。 The conductive metal higher than the massive wedge (50, 51, 70, 72, 74, 76) is electrically connected to the other members of the massive wedge (50, 51, 70, 72, 74, 76). The rotating electrical machine according to claim 6, wherein the portion is covered.
  14. 　請求項１０又は請求項１１記載の回転電機の製造方法において、焼き嵌め、冷やし嵌め、接着、溶接、ろう付け、攪拌接合のいずれかの方法で、上記分割上くさび（３１，３６，４１，４６，６１，６６，８１，８８）と上記分割下くさび（３２，３７，４２，４７，６２，６７，８２，８７）とを一体化する回転電機の製造方法。 12. The method of manufacturing a rotating electrical machine according to claim 10 or 11, wherein the split upper wedge (31, 36, 41, 46) is formed by any one of shrink fitting, cold fitting, adhesion, welding, brazing, and stir welding. , 61, 66, 81, 88) and the divided lower wedge (32, 37, 42, 47, 62, 67, 82, 87).
  15. 　請求項１０又は請求項１１記載の回転電機の製造方法において、焼き嵌めおよび冷やし嵌めのいずれかと、接着、溶接、ろう付けおよび攪拌接合のいずれかと、を併用して、上記分割上くさび（３１，３６，４１，４６，６１，６６，８１，８８）と上記分割下くさび（３２，３７，４２，４７，６２，６７，８２，８７）とを一体化する回転電機の製造方法。 12. The method of manufacturing a rotating electrical machine according to claim 10 or 11, wherein any one of shrink fitting and cold fitting and any one of adhesion, welding, brazing, and stir welding is used in combination, and the split upper wedge (31, 36, 41, 46, 61, 66, 81, 88) and the above divided lower wedge (32, 37, 42, 47, 62, 67, 82, 87).
  16. 　請求項１０又は請求項１１記載の回転電機の製造方法において、接着と、溶接、ろう付けおよび攪拌接合のいずれかと、を併用して、上記分割上くさび（３１，３６，４１，４６，６１，６６，８１，８８）と上記分割下くさび（３２，３７，４２，４７，６２，６７，８２，８７）とを一体化する回転電機の製造方法。 The method of manufacturing a rotating electrical machine according to claim 10 or 11, wherein the split upper wedge (31, 36, 41, 46, 61, 61) is used in combination with adhesion and any one of welding, brazing, and stir welding. 66, 81, 88) and the divided lower wedge (32, 37, 42, 47, 62, 67, 82, 87).
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11646614B2 (en) 2019-06-05 2023-05-09 Mitsubishi Electric Corporation Rotor of rotating electrical machine and repairing method therefor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1198745A (en) * 1997-09-19 1999-04-09 Hitachi Ltd Cylindrical rotor of rotary electric machine
JPH11178261A (en) * 1997-12-11 1999-07-02 Hitachi Ltd Rotor of rotating electric machine
JP2001086685A (en) * 1999-09-17 2001-03-30 Toshiba Corp Rotor of electric rotating machine
JP2006296064A (en) * 2005-04-08 2006-10-26 Mitsubishi Electric Corp Rotor of rotary electric machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1198745A (en) * 1997-09-19 1999-04-09 Hitachi Ltd Cylindrical rotor of rotary electric machine
JPH11178261A (en) * 1997-12-11 1999-07-02 Hitachi Ltd Rotor of rotating electric machine
JP2001086685A (en) * 1999-09-17 2001-03-30 Toshiba Corp Rotor of electric rotating machine
JP2006296064A (en) * 2005-04-08 2006-10-26 Mitsubishi Electric Corp Rotor of rotary electric machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11646614B2 (en) 2019-06-05 2023-05-09 Mitsubishi Electric Corporation Rotor of rotating electrical machine and repairing method therefor

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