WO2021059483A1 - Machine électrique rotative et procédé de fabrication associé - Google Patents

Machine électrique rotative et procédé de fabrication associé Download PDF

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Publication number
WO2021059483A1
WO2021059483A1 PCT/JP2019/038158 JP2019038158W WO2021059483A1 WO 2021059483 A1 WO2021059483 A1 WO 2021059483A1 JP 2019038158 W JP2019038158 W JP 2019038158W WO 2021059483 A1 WO2021059483 A1 WO 2021059483A1
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WO
WIPO (PCT)
Prior art keywords
pole teeth
electric machine
rotary electric
main pole
rotor
Prior art date
Application number
PCT/JP2019/038158
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English (en)
Japanese (ja)
Inventor
真宏 ▲高▼野
小川　徹
朔 森本
森　剛
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/038158 priority Critical patent/WO2021059483A1/fr
Priority to JP2021548118A priority patent/JP7199559B2/ja
Publication of WO2021059483A1 publication Critical patent/WO2021059483A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/08—Salient poles
    • H02K1/10—Commutating poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles

Definitions

  • the present invention relates to a rotary electric machine in which the stator core has a main pole tooth and a auxiliary pole tooth, and a method for manufacturing the same.
  • stator having an armature winding provided on the stator core and the stator core, and a rotor having a permanent magnet provided facing the stator and provided on the rotor core and the rotor core.
  • a rotary electric machine equipped with is known.
  • the stator core is adjacent to the main pole teeth formed in a cylindrical shape, the main pole teeth protruding from the joint iron portion toward the rotor side, and the armature winding wound around them, and the main pole teeth in the circumferential direction. It is provided and has an auxiliary pole tooth protruding from the joint iron portion toward the rotor side.
  • the main pole tooth is a separate member from the joint iron part, and the auxiliary pole tooth is the same member as the joint iron part.
  • the main pole teeth are installed in the joint iron section.
  • the armature windings can be easily wound around the main pole teeth (see, for example, Patent Document 1). ..
  • the main pole teeth are a separate member from the joint iron part. As a result, a gap is formed between the main pole teeth and the joint iron portion. Therefore, the reluctance in the magnetic circuit passing through the main electrode teeth and the joint iron portion increases. As a result, there is a problem that the output torque of the rotary electric machine is reduced.
  • the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to easily wind an armature winding around a main electrode tooth and to improve the output torque of a rotary electric machine. It provides a rotary electric machine capable of producing a rotary electric machine and a method for manufacturing the same.
  • the rotary electric machine according to the present invention is provided on the stator core and the rotor core having an armor winding provided on the stator core and a stator having an armor winding provided on the stator core and the rotor core by facing the stator through a gap. It is equipped with a rotor having a permanent magnet provided, and the stator core is a main pole tooth with a cylindrically formed joint iron part and a main pole tooth protruding from the joint iron part toward the rotor side and wound with an armature winding.
  • the stirrer teeth are a separate member from the joint iron part.
  • the armature winding can be easily wound around the main electrode teeth, and the output torque of the rotary electric machine can be improved.
  • FIG. It is sectional drawing which shows the rotary electric machine which concerns on Embodiment 1.
  • FIG. It is sectional drawing which shows the rotary electric machine which concerns on Embodiment 1.
  • FIG. It is a flowchart which shows the assembly procedure of a stator. It is sectional drawing which shows the rotary electric machine which concerns on Embodiment 2. It is sectional drawing which shows the main part of the rotary electric machine which concerns on Embodiment 3. It is sectional drawing which shows the main part of the modification of the rotary electric machine of FIG. It is a top view which shows the rotary electric machine which concerns on Embodiment 4.
  • FIG. It is a front view which shows the main part of the rotary electric machine which concerns on Embodiment 5.
  • FIG. 1 is a cross-sectional view showing a rotary electric machine according to the first embodiment.
  • an inner rotor type permanent magnet rotary electric machine will be described as an example of the rotary electric machine.
  • the rotary electric machine includes a front housing 1, a stator 2 fixed to the front housing 1, and an end frame 3 fixed to the front housing 1. Further, the rotary electric machine includes a rotary shaft 4 and a rotor 5 fixed to the rotary shaft 4 and rotating together with the rotary shaft 4.
  • the radial direction is the radial direction centered on the central axis O of the rotating shaft 4
  • the circumferential direction is the circumferential direction centered on the central axis O
  • the axial direction is along the central axis O.
  • FIG. 1 shows a cross section of a rotary electric machine that is perpendicular to the circumferential direction.
  • the front housing 1 has a housing cylindrical portion 101 formed in a cylindrical shape and a first bearing holding portion 102 connected to the housing cylindrical portion 101.
  • the stator 2 is fixed to the inner peripheral surface of the housing cylindrical portion 101.
  • the first bearing holding portion 102 is integrally formed with the housing cylindrical portion 101.
  • the stator 2 has a stator core 201, an insulator 202 provided in the stator core 201, and an armature winding 203 provided in the stator core 201 via the insulator 202.
  • the end frame 3 has an end frame base 301 and a second bearing holding portion 302 connected to the end frame base 301.
  • the second bearing holding portion 302 is integrally formed with the end frame base portion 301.
  • the end frame base 301 is formed with an axial inner surface 303 facing the rotor 5 in the axial direction.
  • the axial inner surface 303 is a surface perpendicular to the axial direction.
  • the second bearing holding portion 302 protrudes toward the rotor 5 in the axial direction from the inner side surface 303 in the axial direction.
  • the rotating shaft 4 is composed of a non-magnetic stainless steel shaft, a magnetic carbon steel shaft for mechanical structure, and the like.
  • Examples of carbon steel for machine structure include S10C, S45C, SCM435 and the like.
  • the rotor 5 faces the stator 2 in the radial direction. Further, the rotor 5 is arranged radially inside the stator 2.
  • the rotor 5 has a rotor core 501 and a plurality of permanent magnets 502 provided on the rotor core 501.
  • the permanent magnet 502 is fixed to the surface of the rotor core 501 facing the stator 2, that is, the surface facing outward in the radial direction.
  • the permanent magnet 502 is used as a field magnet in a rotary electric machine.
  • the rotor core 501 is made of a soft magnetic material. Specifically, the rotor core 501 is composed of an electromagnetic steel plate, a dust core, and the like. Further, the rotor core 501 is composed of SPCC, S10C, S45C, SCM435 and the like.
  • the rotary electric machine is held by the first bearing holding portion 102 and is held by the first bearing 6 that rotatably supports the rotating shaft 4, and the second bearing 6 that is held by the second bearing holding portion 302 and rotatably supports the rotating shaft 4. It is provided with a bearing 7.
  • Each of the first bearing 6 and the second bearing 7 is composed of a magnetic material or a non-magnetic material.
  • the second bearing 7 is arranged so as to project from the inner side surface 303 in the axial direction toward the rotor 5.
  • FIG. 2 is a cross-sectional view showing a rotary electric machine according to the first embodiment.
  • FIG. 2 shows a cross section of a rotary electric machine that is perpendicular to the axial direction.
  • the stator core 201 includes a joint iron portion 204, a plurality of main pole teeth 205 protruding from the joint iron portion 204 toward the rotor 5 side, and a plurality of auxiliary pole teeth 206 protruding from the joint iron portion 204 toward the rotor 5 side. And have.
  • the joint iron portion 204 is formed in a cylindrical shape.
  • the outer peripheral surface of the joint iron portion 204 is fixed to the inner peripheral surface of the housing cylindrical portion 101.
  • the main pole teeth 205 protrudes from the joint iron portion 204 to the rotor 5 side, that is, inward in the radial direction.
  • the plurality of main pole teeth 205 are arranged side by side in the circumferential direction.
  • the cross-sectional shape of the main pole teeth 205 perpendicular to the axial direction is T-shaped.
  • the main pole teeth 205 is the same member as the joint iron portion 204. In other words, the main pole teeth 205 is integrally formed with the joint iron portion 204.
  • the shape of the surface of the main pole teeth 205 facing inward in the radial direction is an arc shape centered on the central axis O when viewed in the axial direction.
  • the auxiliary pole teeth 206 protrudes from the joint iron portion 204 to the rotor 5 side, that is, inward in the radial direction.
  • the plurality of auxiliary pole teeth 206 are arranged side by side in the circumferential direction.
  • the cross-sectional shape of the auxiliary pole teeth 206 perpendicular to the axial direction is T-shaped.
  • the auxiliary pole teeth 206 is a separate member from the joint iron portion 204.
  • the shape of the surface of the complementary pole teeth 206 facing inward in the radial direction is an arc shape centered on the central axis O when viewed in the axial direction.
  • the surface of the main pole teeth 205 facing inward in the radial direction and the surface of the auxiliary pole teeth 206 facing inward in the radial direction are arranged on the same circle centered on the central axis O when viewed in the axial direction.
  • the number of main pole teeth 205 and the number of auxiliary pole teeth 206 are in agreement with each other.
  • the main pole teeth 205 and the auxiliary pole teeth 206 are arranged so as to be adjacent to each other in the circumferential direction. In other words, the main pole teeth 205 and the auxiliary pole teeth 206 are arranged alternately at equal intervals in the circumferential direction.
  • one complementary pole teeth 206 is arranged between a pair of main pole teeth 205 adjacent to each other in the circumferential direction, and one main pole is arranged between a pair of auxiliary pole teeth 206 adjacent to each other in the circumferential direction.
  • Teeth 205 is arranged.
  • the plurality of main pole teeth 205 and the plurality of auxiliary pole teeth 206 constitute a plurality of teeth in the stator core 201.
  • the insulator 202 is provided on the main pole teeth 205.
  • the armature winding 203 is provided on the main pole teeth 205 via the insulator 202.
  • the auxiliary pole teeth 206 is not provided with the insulator 202 and the armature winding 203.
  • the plurality of armature windings 203 are divided into three phases. Specifically, the number of main pole teeth 205 is 6, the number of U-phase armature windings 203 is 2, and the number of V-phase armature windings 203 is 2. The number of W-phase armature windings 203 is two.
  • the U-phase armature winding 203 is the U-phase armature winding 203A
  • the V-phase armature winding 203 is the V-phase armature winding 203B
  • the W-phase armature winding 203 is the W-phase armature winding.
  • Line 203C Regarding the winding direction of the armature winding 203, the U-phase armature winding 203A is U, the V-phase armature winding 203B is V, the W-phase armature winding 203C is W, the right-handed winding is +, and the left-handed winding. Is expressed as-.
  • the six armature windings 203 are arranged in the circumferential direction in the order of U +, V ⁇ , W +, U ⁇ , V +, W ⁇ .
  • the winding method of the six armature windings 203 is centralized winding.
  • a drive current is supplied to each of the U-phase armature winding 203A, the V-phase armature winding 203B, and the W-phase armature winding 203C from a drive device (not shown).
  • a rotating magnetic field is generated in the stator 2 by supplying a drive current to each of the U-phase armature winding 203A, the V-phase armature winding 203B, and the W-phase armature winding 203C.
  • the rotor 5 rotates in the forward direction or the reverse direction.
  • n is a natural number, 4 ⁇ n poles 6 ⁇ n slots, 6 ⁇ n poles 9 ⁇ n slots, 8 ⁇ n poles 6 ⁇ n slots, 8 ⁇ n poles 9 ⁇ n slots, 10 ⁇ n poles 9 It may be a ⁇ n slot or the like.
  • n is a natural number, 10 ⁇ n poles 12 ⁇ n slots, 10 ⁇ n poles 15 ⁇ n slots, 12 ⁇ n poles 9 ⁇ n slots, 14 ⁇ n poles 12 ⁇ n slots, 14 ⁇ n. It may be a pole 15 ⁇ n slot.
  • the rotary electric machine includes a support case 8 provided on the rotor 5, a sensor magnet 9 supported by the support case 8 and provided so as to face the axial inner side surface 303 in the axial direction. It is provided with a plurality of magnetic sensors 10 provided on the inner side surface 303 in the axial direction.
  • the support case 8 is made of a non-magnetic material or a magnetic material.
  • the non-magnetic material constituting the support case 8 include brass and brass.
  • Examples of the magnetic material constituting the support case 8 include S45C and S10C.
  • the sensor magnet 9 is fixed to the support case 8 with an adhesive, resin, or the like.
  • the sensor magnet 9 is formed in a cylindrical shape.
  • the sensor magnet 9 is arranged so that the central axis of the sensor magnet 9 overlaps with the central axis O.
  • the magnetic poles on the inner side surface 303 side in the axial direction of the sensor magnet 9 have north and south poles arranged alternately in the circumferential direction. Further, the magnetic poles on the inner side surface 303 side in the axial direction of the sensor magnet 9 are arranged so that the north and south poles are evenly spaced in the circumferential direction.
  • the number of magnetic poles on the inner side surface 303 side in the axial direction of the sensor magnet 9 is n times the number of poles of the rotary electric machine when n is a natural number.
  • the magnetic sensor 10 faces the sensor magnet 9 at regular intervals in the axial direction.
  • Examples of the magnetic sensor 10 include a Hall IC.
  • the plurality of magnetic sensors 10 are arranged side by side in the circumferential direction.
  • the number of the plurality of magnetic sensors 10 is three.
  • Each of the three magnetic sensors 10 is arranged at an electrical angle of 120 degrees.
  • the magnetic sensor 10 is fixed to the end frame 3.
  • the magnetic sensor 10 may be fixed to the end frame 3 via a holding member (not shown).
  • the N-pole magnetized portion and the S-pole magnetized portion of the sensor magnet 9 alternately face the magnetic sensor 10.
  • the magnetic sensor 10 detects that the portion of the sensor magnet 9 magnetized at the north pole and the portion magnetized at the south pole face the magnetic sensor 10.
  • the detection signal of the magnetic sensor 10 is output to a control circuit (not shown).
  • the control circuit calculates the rotation angle or rotation position of the rotor 5 and the rotation number of the rotor 5 based on the detection signal of the magnetic sensor 10.
  • the control circuit controls the drive of the rotating electric machine by using the rotation angle or the rotation position of the rotor 5 and the rotation number of the rotor 5.
  • the rotation angle or rotation position of the rotor 5 and the rotation number of the rotor 5 are calculated by a detection signal such as an encoder or a resolver without using a detection signal by a position sensor provided with a sensor magnet 9 and a magnetic sensor 10. May be used.
  • FIG. 3 is a flowchart showing an assembly procedure of the stator 2.
  • step S101 the armature winding 203 is wound around the main pole teeth 205.
  • step S101 the auxiliary pole teeth 206 are separated from the joint iron portion 204. Therefore, a sufficient space for winding the armature winding 203 is formed around the main pole teeth 205. As a result, it becomes easy to wind the armature winding 203 around the main pole teeth 205.
  • step S102 the auxiliary pole teeth 206 is attached to the joint iron portion 204.
  • the stator 2 is assembled by attaching the auxiliary pole teeth 206 to the joint iron portion 204. This completes the procedure for assembling the stator 2.
  • the main pole teeth 205 is the same member as the joint iron portion 204
  • the auxiliary pole teeth 206 is a separate member from the joint iron portion 204. .. Since the auxiliary pole tooth 206 is a separate member from the joint iron portion 204, the armature is attached to the main pole tooth 205 as compared with the rotary electric machine in which the auxiliary pole tooth 206 is the same member as the joint iron portion 204. Winding 203 can be easily wound.
  • the main pole teeth 205 are the same member as the joint iron portion 204, the main pole teeth 205 and the main pole teeth 205 are compared with the rotary electric machine in which the main pole teeth 205 is a separate member from the joint iron portion 204.
  • the magnetic resistance in the magnetic circuit passing through the joint iron portion 204 is reduced.
  • the magnetic flux passing through the main pole teeth 205 which contributes to the generation of torque in the rotary electric machine, increases.
  • the output torque of the rotary electric machine can be improved.
  • FIG. 4 is a cross-sectional view showing a rotary electric machine according to the second embodiment.
  • FIG. 4 shows a cross section of a rotary electric machine that is perpendicular to the axial direction.
  • an outer rotor type permanent magnet rotary electric machine will be described as an example of the rotary electric machine.
  • the stator 2 is fixed to the outer peripheral surface of the stator shaft 11 formed in a cylindrical shape.
  • the rotor 5 is arranged radially outside the stator 2.
  • the rotor core 501 is formed in a cylindrical shape.
  • the rotor core 501 is made of a magnetic carbon steel for mechanical structure. Examples of carbon steel for machine structure include S10C, S45C, SCM435 and the like.
  • the rotor core 501 is rotatably supported by a bearing (not shown) held by a bearing holding portion (not shown) formed on the stator 2.
  • the permanent magnet 502 is fixed to the surface of the rotor core 501 facing the stator 2, that is, the surface facing inward in the radial direction.
  • the permanent magnet 502 is fixed to the surface of the rotor core 501 facing inward in the radial direction, but an electromagnetic steel plate or an electromagnetic steel plate made of a soft magnetic material is fixed on the surface of the rotor core 501 facing inward in the radial direction.
  • the permanent magnet 502 may be fixed to the rotor core 501 via the dust core.
  • the magnetic steel sheet or the dust core is a separate member from the rotor core 501, and the magnetic flux passing through the permanent magnet 502 passes through the electromagnetic steel plate or the dust core.
  • the inner peripheral surface of the joint iron portion 204 is fixed to the outer peripheral surface of the stator shaft 11.
  • the main pole teeth 205 protrudes from the joint iron portion 204 to the rotor 5 side, that is, to the outside in the radial direction.
  • the main pole teeth 205 is the same member as the joint iron portion 204. In other words, the main pole teeth 205 is integrally formed with the joint iron portion 204.
  • the shape of the surface of the main pole teeth 205 facing outward in the radial direction is an arc shape centered on the central axis O when viewed in the axial direction.
  • the auxiliary pole teeth 206 protrudes from the joint iron portion 204 to the rotor 5 side, that is, to the outside in the radial direction.
  • the auxiliary pole teeth 206 is a separate member from the joint iron portion 204.
  • the shape of the surface of the complementary pole teeth 206 facing outward in the radial direction is an arc shape centered on the central axis O when viewed in the axial direction.
  • the surface of the main pole teeth 205 facing outward in the radial direction and the surface of the auxiliary pole teeth 206 facing outward in the radial direction are arranged on the same circle centered on the central axis O when viewed in the axial direction.
  • Other configurations are the same as those in the first embodiment.
  • the main pole teeth 205 is the same member as the joint iron portion 204
  • the auxiliary pole teeth 206 is a separate member from the joint iron portion 204. .. Since the auxiliary pole tooth 206 is a separate member from the joint iron portion 204, the armature is wound around the main pole tooth 205 as compared with the rotary electric machine in which the auxiliary pole tooth is the same member as the joint iron portion 204.
  • the wire 203 can be easily wound.
  • the main pole teeth 205 are the same member as the joint iron portion 204, the main pole teeth 205 and the main pole teeth 205 are compared with the rotary electric machine in which the main pole teeth 205 is a separate member from the joint iron portion 204.
  • the magnetic resistance in the magnetic circuit passing through the joint iron portion 204 is reduced.
  • the magnetic flux passing through the main pole teeth 205 which contributes to the generation of torque in the rotary electric machine, increases.
  • the output torque of the rotary electric machine can be improved.
  • FIG. 5 is a cross-sectional view showing a main part of the rotary electric machine according to the third embodiment.
  • FIG. 5 shows a cross section of a main part of a rotary electric machine that is perpendicular to the axial direction.
  • an inner rotor type permanent magnet rotating electric machine is shown.
  • Wmt> Wst is satisfied.
  • the auxiliary pole teeth 206 and the main pole teeth 205 and the joint iron portion 204 that are adjacent to each other in the circumferential direction are surrounded by the auxiliary pole teeth 206 when viewed in the axial direction.
  • the area of the slot S which is an area, becomes large.
  • the wire diameter of the armature winding 203 can be increased.
  • the electrical resistance of the armature winding 203 decreases.
  • the copper loss generated in the armature winding 203 can be reduced.
  • Wmt> Wst is satisfied, the magnetic flux passing through the main pole teeth 205, which contributes to torque generation in the rotary electric machine, increases. As a result, the output torque of the rotary electric machine can be improved.
  • FIG. 6 is a cross-sectional view showing a main part of a modified example of the rotary electric machine of FIG.
  • FIG. 6 shows a cross section of a main part of a rotary electric machine that is perpendicular to the axial direction.
  • FIG. 6 only the stator 2 is shown.
  • Wmt> Wst is satisfied as in FIG. That is, the dimension Wmt of the main pole teeth 205 in the circumferential direction is larger than the minimum dimension Wst of the auxiliary pole teeth 206 in the circumferential direction.
  • FIG. 7 is a plan view showing a rotary electric machine according to the fourth embodiment.
  • FIG. 7 shows a rotary electric machine when viewed in the axial direction.
  • a rotary electric machine having 10 poles and 12 slots has been described.
  • an 8-pole 9-slot rotary electric machine will be described.
  • the plurality of armature windings 203 are divided into three phases. Specifically, the number of main pole teeth 205 is 6, the number of U-phase armature windings 203 is 2, and the number of V-phase armature windings 203 is 2.
  • the number of W-phase armature windings 203 is two. Regarding the winding direction of the armature winding 203, the U-phase armature winding 203A is U, the V-phase armature winding 203B is V, the W-phase armature winding 203C is W, the right-handed winding is +, and the left-handed winding. Is expressed as-.
  • the six armature windings 203 are arranged in the circumferential direction in the order of U +, U +, V +, V +, W +, and W +.
  • the winding method of the six armature windings 203 is centralized winding.
  • Armature windings 203 of the same phase are wound around each other, and auxiliary pole teeth 206 are arranged between a pair of main pole teeth 205 adjacent to each other in the circumferential direction. That is, the auxiliary pole teeth 206 are arranged between the pair of main pole teeth 205 around which the pair of U-phase armature windings 203A are wound.
  • auxiliary pole teeth 206 are arranged between the pair of main pole teeth 205 around which the pair of V-phase armature windings 203B are wound. Further, the auxiliary pole teeth 206 are arranged between the pair of main pole teeth 205 around which the pair of W-phase armature windings 203C are wound.
  • a pair of main pole teeth 205 around which armature windings 203 of different phases are wound are adjacent to each other in the circumferential direction.
  • the main pole teeth 205 around which the U-phase armature winding 203A is wound and the main pole teeth 205 around which the V-phase armature winding 203B is wound are adjacent to each other in the circumferential direction.
  • the main pole teeth 205 around which the V-phase armature winding 203B is wound and the main pole teeth 205 around which the W-phase armature winding 203C is wound are adjacent to each other in the circumferential direction.
  • the main pole teeth 205 around which the W-phase armature winding 203C is wound and the main pole teeth 205 around which the U-phase armature winding 203A is wound are adjacent to each other in the circumferential direction.
  • the pair of main pole teeth 205 around which the armature windings 203 of different phases are wound are adjacent to each other in the circumferential direction, it becomes difficult to increase the conductor occupancy of the armature winding 203. Further, when the armature winding 203 is wound around the main pole teeth 205 by using a general-purpose nozzle winding machine, the circumferential dimension of the slot opening 207 between the teeth adjacent to each other in the circumferential direction becomes large. By increasing the circumferential dimension of the slot opening 207, the cogging torque generated in the rotary electric machine increases.
  • the conductor occupancy rate of the armature winding 203 is lowered and the cogging torque is increased as compared with the rotary electric machine according to the first embodiment and the second embodiment. ..
  • Other configurations are the same as those of the first to third embodiments.
  • the auxiliary pole teeth 206 is compared with the rotary electric machine in which the joint iron portion 204 is the same member. Therefore, the armature winding 203 can be easily wound around the main pole teeth 205. Further, in this rotary electric machine, as in the first and second embodiments, the output torque of the rotary electric machine is reduced as compared with the rotary electric machine in which the main pole teeth 205 is a separate member from the joint iron portion 204. Can be improved.
  • FIG. 9 is a front view showing a main part of a modified example of the rotary electric machine of FIG.
  • Lst> Lmt ⁇ Lmg is satisfied.
  • Lmg ⁇ Lst> Lmt is satisfied.
  • the reluctance in the gap between the so-called overhanging permanent magnet 502 and the auxiliary pole teeth 206 is reduced. This improves the permeance of the permanent magnet 502. As a result, the output of the rotary electric machine is improved.
  • FIG. 10 is a front view showing a main part of another modification of the rotary electric machine of FIG.
  • Lst> Lmt is satisfied.
  • Lmt> Lst is satisfied.
  • the armature winding 203 is not wound around the auxiliary pole teeth 206.
  • a space SP is formed on the outer side of the auxiliary pole teeth 206 in the radial direction with respect to the surface facing outward in the axial direction.
  • the magnetic sensor 10 may be arranged in the space SP.
  • the permanent magnet 502 may be used as the sensor magnet 9.
  • the space SP may be provided with a connection portion of the armature winding 203, a heat radiating member, and the like. In these cases, the axial dimension of the rotary electric machine can be reduced.
  • FIG. 11 is a perspective view showing a rotary electric machine according to the sixth embodiment.
  • FIG. 12 is an exploded perspective view showing the rotary electric machine of FIG.
  • an outer rotor type rotary electric machine will be described as an example of the rotary electric machine.
  • Lst> Lmg ⁇ Lmt or Lmg ⁇ Lst> Lmt is satisfied.
  • the stator core 201 has a bridge portion 208 integrally formed with a plurality of auxiliary pole teeth 206 and formed in an annular shape.
  • the bridge portion 208 is overlapped with the joint iron portion 204 in the axial direction.
  • the plurality of auxiliary pole teeth 206 are modularized. Therefore, the stator 2 can be easily assembled.
  • the bridge portion 208 has the strength required for the bridge portion 208 and the auxiliary pole teeth 206 to be integrally formed.
  • the axial dimension of the bridge portion 208 is small enough to prevent the magnetic flux entering the auxiliary pole teeth 206 from leaking to another auxiliary pole teeth 206 via the bridge portion 208.
  • the stator core 201 is integrally formed with the auxiliary pole teeth 206, and the bridge portion 208 formed in an annular shape is provided.
  • the bridge portion 208 is vertically overlapped with the joint iron portion 204. This facilitates the assembly of the stator 2.
  • FIG. 13 is a perspective view showing a modified example of the rotary electric machine of FIG.
  • FIG. 14 is an exploded perspective view showing the rotary electric machine of FIG.
  • the bridge portion 208 is vertically overlapped with the joint iron portion 204 via an insulator 202 made of a thermoplastic resin.
  • the configuration in which the bridge portion 208 is overlapped with the joint iron portion 204 in the axial direction has been described.
  • a resin mold (not shown) may be used for fixing between the main pole teeth 205 and the auxiliary pole teeth 206.
  • a hole 209 extending in the axial direction may be formed in the bridge portion 208, and a protrusion 210 may be formed on the surface of the insulator 202 facing outward in the axial direction.
  • the axial end portion of the protrusion 210 is partially heated and melted to form a caulking on the protrusion 210.
  • the axial movement of the auxiliary pole teeth 206 with respect to the joint iron portion 204 is restricted.
  • FIG. 15 is a cross-sectional view showing an electrically variable valve timing mechanism (VVT: Variable Valve Timing) using the rotary electric machine according to the seventh embodiment.
  • FIG. 16 is a configuration diagram showing an internal combustion engine in which the electric variable valve timing mechanism of FIG. 15 is used.
  • the internal combustion engine is a 4-stroke engine with a double over head camshaft structure.
  • the four strokes are four steps of expansion, exhaust, intake and compression.
  • the double over head camshaft structure has cam shafts on the intake side and the exhaust side, respectively.
  • the intake side camshaft is the intake side camshaft 12, and the exhaust side camshaft is the exhaust side camshaft 13.
  • the internal combustion engine is equipped with an electric variable valve timing mechanism 14.
  • the electric variable valve timing mechanism 14 includes a speed reducer 141 provided at the axial end of the intake side camshaft 12 and an electric motor 142 which is a rotary electric machine provided in the speed reducer 141.
  • the output shaft 143 of the speed reducer 141 is fixed to the intake side cam shaft 12 using a screw (not shown).
  • the internal combustion engine is equipped with a variable hydraulic valve timing mechanism 15.
  • the hydraulic variable valve timing mechanism 15 is provided at the axial end of the exhaust side camshaft 13.
  • the internal combustion engine includes a crankshaft 16, a sprocket 17 that rotates with the crankshaft 16, a sprocket 18 that rotates with the intake side camshaft 12, and a sprocket 19 that rotates with the exhaust side camshaft 13.
  • the sprocket 17 is attached to the axial end of the crankshaft 16.
  • the sprocket 18 is attached to the axial end of the intake side camshaft 12.
  • the sprocket 19 is attached to the axial end of the exhaust side camshaft 13.
  • the internal combustion engine includes a sprocket 17, a sprocket 18, and a timing chain 20 provided over the sprocket 19.
  • the intake side cam shaft 12 and the exhaust side cam shaft 13 rotate in conjunction with the rotation of the crank shaft 16.
  • the number of teeth of each of the sprocket 18 and the sprocket 19 is twice the number of teeth of the sprocket 17.
  • the diameter of each of the sprocket 18 and the sprocket 19 is twice the diameter of the sprocket 17.
  • the electric variable valve timing mechanism 14 has a control circuit 144 that controls the electric motor 142.
  • the control circuit is an EDU (Electro Drive Unit).
  • the electric motor 142 is an outer rotor type electric motor.
  • the electric motor 142 includes a stator 2 and a rotor 5.
  • the input shaft 145 of the speed reducer 141 is hollow.
  • the input shaft 145 is integrally formed with the rotor core 501.
  • the stator shaft is fixed to a cover (not shown) of the control circuit 144. The fixing of the stator shaft to the cover is carried out by forming the stator shaft integrally with the cover or by connecting the stator shaft to the cover by a mechanism such as a coupling.
  • the stator 2 is fixed to the rotor shaft.
  • the stator 2 is fixed to the rotor shaft by press-fitting the stator 2 into the stator shaft or by shrink-fitting the stator 2 into the stator shaft.
  • the axial dimension of the electric variable valve timing mechanism 14 can be significantly reduced.
  • the electric variable valve timing mechanism 14 can be easily arranged in the engine room where the space is small.
  • the electric variable valve timing mechanism 14 in which the speed reducer 141 is a planetary differential gear speed reducer has been described.
  • the speed reducer 141 may be a wave gear speed reducer, a planetary gear speed reducer, or a cyclo speed reducer in addition to the planetary differential gear speed reducer.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne une machine électrique rotative dans laquelle un enroulement d'induit peut être facilement enroulé autour d'une dent polaire principale et dont le couple de sortie peut être amélioré. Cette machine électrique rotative comporte : un stator ayant un noyau de stator et un enroulement d'induit ; et un rotor disposé en vis-à-vis du stator avec un entrefer interposé entre ceux-ci et ayant un noyau de rotor et un aimant permanent. Le noyau de stator comporte : une portion culasse de forme cylindrique ; une dent polaire principale qui fait saillie à partir de la partie culasse vers le côté rotor et autour de laquelle est enroulé l'enroulement d'induit ; et une dent polaire auxiliaire disposée adjacente à la dent polaire principale dans la direction circonférentielle et faisant saillie à partir de la portion de culasse vers le côté rotor. La dent polaire principale est le même élément que l'élément de culasse, et la dent polaire auxiliaire est un élément différent de l'élément de culasse.
PCT/JP2019/038158 2019-09-27 2019-09-27 Machine électrique rotative et procédé de fabrication associé WO2021059483A1 (fr)

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PCT/JP2019/038158 WO2021059483A1 (fr) 2019-09-27 2019-09-27 Machine électrique rotative et procédé de fabrication associé
JP2021548118A JP7199559B2 (ja) 2019-09-27 2019-09-27 回転電機およびその製造方法

Applications Claiming Priority (1)

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PCT/JP2019/038158 WO2021059483A1 (fr) 2019-09-27 2019-09-27 Machine électrique rotative et procédé de fabrication associé

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441760A (en) * 1967-06-29 1969-04-29 Reliance Electric & Eng Co Frame for dynamoelectric machine with reluctance varying magnetic shim space
US5909072A (en) * 1983-09-05 1999-06-01 Papst Licensing Gmbh Brushless three-phase dc motor
JP2017104005A (ja) * 2015-09-30 2017-06-08 ジョンソン エレクトリック ソシエテ アノニム ブラシレスモータ
JP2017188982A (ja) * 2016-04-01 2017-10-12 株式会社ミツバ ステータ、その製造方法、およびブラシレスモータ
WO2019093205A1 (fr) * 2017-11-13 2019-05-16 アイシン精機株式会社 Noyau de stator et procédé de fabrication de noyau de stator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441760A (en) * 1967-06-29 1969-04-29 Reliance Electric & Eng Co Frame for dynamoelectric machine with reluctance varying magnetic shim space
US5909072A (en) * 1983-09-05 1999-06-01 Papst Licensing Gmbh Brushless three-phase dc motor
JP2017104005A (ja) * 2015-09-30 2017-06-08 ジョンソン エレクトリック ソシエテ アノニム ブラシレスモータ
JP2017188982A (ja) * 2016-04-01 2017-10-12 株式会社ミツバ ステータ、その製造方法、およびブラシレスモータ
WO2019093205A1 (fr) * 2017-11-13 2019-05-16 アイシン精機株式会社 Noyau de stator et procédé de fabrication de noyau de stator

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JPWO2021059483A1 (fr) 2021-04-01

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