US20180262071A1 - Stator for rotary electric machine and manufacturing apparatus thereof - Google Patents

Stator for rotary electric machine and manufacturing apparatus thereof Download PDF

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Publication number
US20180262071A1
US20180262071A1 US15/914,443 US201815914443A US2018262071A1 US 20180262071 A1 US20180262071 A1 US 20180262071A1 US 201815914443 A US201815914443 A US 201815914443A US 2018262071 A1 US2018262071 A1 US 2018262071A1
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United States
Prior art keywords
stator
distance
circumferential direction
conductor
conductor segment
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
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US15/914,443
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English (en)
Inventor
Yasushi Nishikuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA reassignment TOYOTA JIDOSHA KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NISHIKUMA, YASUSHI
Publication of US20180262071A1 publication Critical patent/US20180262071A1/en
Priority to US16/905,226 priority Critical patent/US11557931B2/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/20—Bending sheet metal, not otherwise provided for
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/0056—Manufacturing winding connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/026—Wound cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
    • 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
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
    • 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

Definitions

  • the present disclosure relates to a stator for a rotary electric machine and a manufacturing apparatus thereof, and particularly to a stator for a rotary electric machine including a stator coil configured such that a tip end of a conductor segment projecting from a slot of a stator core is joined to a tip end of another conductor segment in the same phase.
  • segment coil as a stator coil wound around a stator core of a rotary electric machine.
  • the segment coil is configured such that a conductor segment made of a flat lead wire bent in a U-shape is inserted into a slot of a stator core, and a part projecting from the slot is bent in a stator circumferential direction, so as to be joined by welding to a tip end of another conductor segment, for example.
  • a rotary electric machine has been downsized, and a diameter of a stator core including segment coils tends to be reduced.
  • a joining part (a tip end) of a conductor segment forming a segment coil and a joining part of its adjacent conductor segment in a different phase is shortened, which makes it difficult to secure an insulating property between the joining parts.
  • the joining parts of the conductor segments are coated with insulation resin.
  • a step of insulating the joining parts after welding is required and an insulation resin material to coat the joining parts is also required, which increases costs.
  • the present disclosure improves an insulating property of joining parts of conductor segments in a stator including a segment coil.
  • a first aspect of the present disclosure relates to a stator for a rotary electric machine.
  • the stator includes: a stator core including slots provided at a plurality of positions in a circumferential direction; and a stator coil configured such that a tip end of a conductor segment projecting from a stator-core axial end of each of the slots and bent in the circumferential direction of the stator core is joined to a tip end of another conductor segment in the same phase.
  • a conductive material is exposed from the tip ends of the conductor segments, and a distance between the tip ends in different phases and adjacent to each other in the circumferential direction of the stator core is larger than a distance between the tip ends in the same phase and adjacent to each other in the circumferential direction of the stator core.
  • stator including a segment coil
  • a distance between the conductor segments in different phases and adjacent to each other in the circumferential direction of the stator core may be larger than a distance between the conductor segments in the same phase and adjacent to each other in the circumferential direction of the stator core.
  • a second aspect of the present disclosure relates to a manufacturing apparatus for a stator for a rotary electric machine.
  • the manufacturing apparatus includes a jig configured to bend, in a stator-core circumferential direction, conductor segments projecting from stator-core axial end surfaces of slots provided in a stator core.
  • the jig includes a first jig configured to bend one conductor segment out of the conductor segments in the same phase and adjacent to each other in the stator-core circumferential direction, and a second jig configured to bend the other conductor segment.
  • the second jig is configured to bend the other conductor segment such that a tip end of the other conductor segment approaches a tip end of the one conductor segment at a time when the first jig bends the one conductor segment.
  • the first jig may include a protrusion configured to bend the one conductor segment.
  • the protrusion may include a tilting surface configured to abut with the tip end of the one conductor segment and to tilt and bend the one conductor segment in the circumferential direction, and a position defining surface configured to define a position of the tip end of the one conductor segment after the one conductor segment is bent.
  • FIG. 1 is an enlarged perspective view around a coil end of a stator for a rotary electric machine
  • FIG. 2 is a schematic front view of a conductor segment before assembling to a stator core
  • FIG. 3 is a schematic view of a segment coil to describe an arrangement relationship of joining parts of conductor segments in each phase;
  • FIG. 4 is an enlarged view of a part A in FIG. 3 ;
  • FIG. 5 is a schematic configuration diagram of a bending device for bending conductor segments
  • FIG. 6 is a partially enlarged view of a jig of the bending device and is a drawing illustrating an arrangement relationship between the jig and the stator core;
  • FIG. 7 is a sectional view taken along a line VII-VII of FIG. 6 ;
  • FIG. 8 is a flowchart to describe a manufacturing method of a stator
  • FIG. 9 is an explanatory view of an operation of the jig at the time when the conductor segments are bent.
  • FIG. 10 is another explanatory view of an operation of the jig at the time when the conductor segments are bent.
  • an “axial direction,” a “circumferential direction,” and a “radial direction” indicate an axial direction, a circumferential direction, and a radial direction of the stator 20 for the rotary electric machine.
  • the stator 20 for the rotary electric machine includes a stator core 22 and a stator coil 24 .
  • the stator core 22 is configured such that a plurality of electromagnetic steel sheets is laminated in an axial direction.
  • the stator core 22 includes a generally cylindrical yoke 26 , and a plurality of teeth 28 projecting radially inward from an inner peripheral edge of the yoke 26 .
  • the plurality of teeth 28 is disposed at regular intervals in the circumferential direction, and a slot 30 , which is a space where the stator coil 24 is placed, is formed between two adjacent teeth 28 .
  • the stator coil 24 includes a U-phase coil, a V-phase coil, and a W-phase coil.
  • the stator coil 24 is configured as a segment coil, and the segment coil is configured such that a plurality of conductor segments 32 is joined to each other.
  • FIG. 2 illustrates one conductor segment 32 before assembling to the stator core 22 .
  • the conductor segment 32 is formed such that a flat conductive material having a generally rectangular section and coated with insulation resin is bent generally in a U-shape.
  • the conductor segment 32 includes a pair of linear parts 50 , and a connecting part 34 that connects the pair of linear parts 50 to each other.
  • the pair of linear parts 50 are inserted into respective slots 30 .
  • the connecting part 34 extends in the circumferential direction so as to cross a plurality of teeth 28 on a second axial end side of the stator core 22 .
  • tip ends 40 of the linear parts 50 are inserted into the slots 30 and then bent in the circumferential direction in a middle thereof as indicated by an alternate long and two short dashes line in FIG. 2 .
  • the linear parts 50 become leg parts 36 extending in the axial direction inside the slots 30 , and bridge parts 38 extending in the circumferential direction on a first axial end side of the stator core 22 .
  • the conductor segment 32 is coated with the insulation resin as described above, but the insulation resin is removed only from the tip ends 40 of the linear parts 50 . This is to secure electrical connection with other conductor segments 32 .
  • the tip ends 40 are joined to each other by welding or the like. This joining will be described later.
  • FIG. 3 schematically illustrates an arrangement relationship of the tip ends 40 of the conductor segments 32 in a coil end
  • FIG. 4 is an enlarged view of a part A in FIG. 3 .
  • the enlarged view of the part A illustrates tip ends 40 of a U 1 -phase, a U 2 -phase, a V 1 -phase, and a V 2 -phase. Note that, in FIGS. 3 and 4 , a reference sign of a corresponding phase is assigned to each conductor segment 32 and each tip end 40 .
  • the conductor segments 32 are placed repeatedly in an order of the U 1 -phase, the U 2 -phase, the V 1 -phase, the V 2 -phase, a W 1 -phase, and a W 2 -phase in the circumferential direction.
  • a tip-end distance G 1 a between tip ends 40 U 2 , 40 V 1 in different phases e.g., the U 2 -phase and the V 1 -phase
  • a tip-end distance G 2 a between tip ends 40 U 1 , 40 U 2 in the same phase the U 1 -phase and the U 2 -phase
  • a conductor-segment distance G 1 b in the axial direction between conductor segments 32 U 2 , 32 V 1 in different phases (e.g., the U 2 -phase and the V 1 -phase) and adjacent to each other in the circumferential direction is larger than a conductor-segment distance G 2 b in the axial direction between conductor segments 32 U 1 , 32 U 2 in the same phase (e.g., the U 1 -phase and the U 2 -phase) and adjacent to each other in the circumferential direction. That is, a relationship of the conductor-segment distance G 1 b in different phases >the conductor-segment distance G 2 b in the same phase is satisfied. Further, a conductor-segment distance G 1 c in different phases in an orthogonal direction to surfaces of the conductor segments 32 is larger than a conductor-segment distance G 2 c in the same phase.
  • a position of the tip end 40 U 2 of the conductor segment 32 U 2 is adjusted so that the tip end 40 U 2 of the conductor segment 32 U 2 approaches the tip end 40 U 1 of the conductor segment 32 U 1 .
  • tip ends of conductor segments in the related art are placed at regular intervals (at a distance P 1 ), but in the present embodiment, the conductor segment 32 U 2 is bent so that the tip end 40 U 2 approaches the tip end 40 U 1 , that is, a distance between the tip end 40 U 2 and the tip end 40 U 1 in the same phase is a distance P 2 (P 2 ⁇ P 1 ), which is smaller than the distance P 1 .
  • a distance between the tip end 40 U 2 and the tip end 40 V 1 in different phases is a distance P 3 (P 3 >P 1 ), which is larger than the distance P 1 .
  • the distance L 1 is set based on a specification of the conductor segment 32 U 2 or the tip end 40 U 2 appropriately.
  • the distance P 3 >the distance P 2 is established, so that the relationship of the tip-end distance G 1 a >the tip-end distance G 2 a is established.
  • tip ends 40 V 2 , 40 W 2 of conductor segments 32 V 2 , 32 W 2 positions of the tip ends 40 V 2 , 40 W 2 are adjusted at the time of bending the conductor segments 32 V 2 , 32 W 2 . Note that a specific position adjustment of the tip ends 40 U 2 , 40 V 2 , 40 W 2 will be described later.
  • FIG. 5 illustrates a schematic configuration of a bending device 60 for bending the conductor segments 32 . As illustrated in FIG.
  • the bending device 60 includes: a stator core fixing portion 62 configured to fix the stator core 22 in which the conductor segments 32 are inserted into the slots 30 ; an annular jig 64 configured to bend the conductor segment 32 ; a jig holding portion 66 configured to rotate the jig 64 and move the jig 64 up and down in the axial direction; and a controlling portion 68 configured to control operations of the stator core fixing portion 62 , the jig 64 , and the jig holding portion 66 .
  • the configuration of the bending device 60 other than the jig 64 is similar to a configuration of a well-known bending device (see Japanese Patent Application Publication No. 2006-136082 (JP 2006-136082 A)), and therefore, a description thereof is omitted.
  • FIG. 6 is a partial enlarged view when the jig 64 is viewed from a side surface.
  • the jig 64 includes a first jig 70 configured to bend the conductor segments 32 U 1 , 32 V 1 , 32 W 1 , and a second jig 72 configured to bend the conductor segments 32 U 2 , 32 V 2 , 32 W 2 .
  • the first jig 70 includes protrusions 71 configured to bend the conductor segments 32 U 1 , 32 V 1 , 32 W 1 .
  • the protrusions 71 are disposed at distances P 20 corresponding to arrangement positions of the conductor segments 32 U 1 , 32 V 1 , 32 W 1 .
  • the distance P 20 is twice as large as a distance P 10
  • the distance P 10 is the same distance as the distance P 1 illustrated in FIG. 3 .
  • the protrusion 71 includes: a tilting surface 71 a configured to abut with the tip end 40 of the conductor segment 32 and to tilt and bend the conductor segment 32 in the circumferential direction; and a position defining surface 71 b configured to define a position of the tip end 40 of the conductor segment 32 after the conductor segment 32 is bent.
  • the second jig 72 has an annular shape having a diameter smaller than the first jig 70 , and is disposed inside the first jig 70 . As illustrated in FIG. 7 , an inner peripheral surface of the first jig 70 slidably makes contact with an outer peripheral surface of the second jig 72 . Further, the second jig 72 has a shape similar to the first jig 70 . Protrusions 73 of the second jig 72 are disposed so as to correspond to arrangement positions of the conductor segments 32 U 2 , 32 V 2 , 32 W 2 . A disposition distance is the same as the protrusions 71 , and the protrusions 73 are disposed at the distances P 20 .
  • the distance P 20 is twice as large as the distance P 10 , and the distance P 10 is the same distance as the distance P 1 illustrated in FIG. 3 .
  • the protrusions 71 , 73 are disposed at the same distance P 10 as the distance P 1 illustrated in FIG. 3 .
  • the jig holding portion 66 that holds the first jig 70 and the second jig 72 includes respective actuators configured to rotationally drive the first jig 70 and the second jig 72 , so as to rotationally drive the first jig 70 and the second jig 72 , individually.
  • These actuators are controlled by the controlling portion 68 , and can reversely rotate the second jig 72 after the rotation of the first jig 70 , or can stop the rotation of the second jig 72 during the rotation of the first jig 70 , for example. Note that operations of the first jig 70 and the second jig 72 will be describe later more specifically.
  • a manufacturing apparatus for manufacturing the stator 20 includes: an insertion device configured to insert the conductor segments 32 into the stator core 22 ; the bending device 60 configured to bend the conductor segments 32 projecting from the slots 30 ; and a welding device configured to join the tip ends 40 of the bent conductor segments 32 thus bent. As illustrated in FIG.
  • the manufacture of the stator 20 includes: an insertion step (step S 10 ) of inserting the conductor segments 32 into the slots 30 of the stator core 22 ; a bending step (step S 20 ) of bending the conductor segments 32 projecting from the slots 30 , following the insertion step; and a joining step (step S 30 ) of joining the tip ends 40 of the conductor segments 32 thus bent.
  • step S 10 the conductor segments 32 illustrated in FIG. 2 are inserted into the slots 30 of the stator core 22 from the first axial end side. After the conductor segments 32 are inserted into all the slots 30 , the stator core 22 is carried into the bending device 60 .
  • step S 20 the stator core 22 carried into the bending device 60 is fixed with the stator core fixing portion 62 .
  • the jig 64 is moved down, and the protrusions 71 of the first jig 70 and the protrusions 73 of the second jig 72 are brought into contact with the tip ends 40 of their corresponding conductor segments 32 . From this state, the first jig 70 and the second jig 72 are moved down and rotated so as to tilt and bend the conductor segments 32 .
  • FIG. 9 illustrates the bending operation of the conductor segment 32 U 1 and the conductor segment 32 U 2 adjacent to the conductor segment 32 U 1 .
  • the protrusion 71 is moved down and rotated from a position H 1 a where the protrusion 71 abuts with the tip end 40 U 1 of the conductor segment 32 U 1 , such that the protrusion 71 moves through the position H 1 a , a position H 2 a , and a position H 3 a , so that the tilting surface 71 a of the protrusion 71 presses the tip end 40 U 1 so as to press down (bend) the conductor segment 32 U 1 .
  • the tip end 40 U 1 When the protrusion 71 moves to a position H 4 a , the tip end 40 U 1 is separated from the tilting surface 71 a and abuts with the position defining surface 71 b . Further, when the protrusion 71 moves from the position H 4 a to a position H 5 a , a position of the tip end 40 U 1 in the circumferential direction is defined by the position defining surface 71 b of the protrusion 71 . Note that a movement locus at the time when the protrusion 71 moves from the position H 1 a to the position H 5 a is indicated by a reference sign K 1 . Further, the movement locus K 1 is extracted to be illustrated in a characteristic view.
  • the protrusion 73 presses down (bends) the conductor segment 32 U 2 in conjunction with the moving-down and rotating of the protrusion 71 . That is, the protrusion 73 moves in a similar manner to the protrusion 71 from a position H 1 b to a position H 5 b . After the operation of the protrusion 71 is finished, the protrusion 73 rotates reversely from the position H 5 b to a position H 6 b .
  • a reverse rotation angle is an angle corresponding to a distance L 1 .
  • the distance L 1 is the same distance as the distance L 1 illustrated in FIG. 3 .
  • the protrusion 73 pushes back the tip end 40 U 2 only by the distance L 1 , so as to adjust a position of the tip end 40 U 2 . Since the tip end 40 U 2 is pushed back by the distance L 1 , the tip end 40 U 2 approaches the tip end 40 U 1 . Further, a movement locus at the time when the protrusion 73 moves from the position H 1 b to the position H 6 b is indicated by a reference sign K 2 , and the movement locus K 2 is extracted to be illustrated in a characteristic view.
  • the protrusion 73 reversely rotates independently from the protrusion 71 after the operation of the protrusion 71 is finished. Due to the reverse rotation, the tip end 40 U 2 is pushed back only by the distance L 1 and approaches the tip end 40 U 1 , as illustrated in FIG. 3 . As a result, as illustrated in FIG.
  • a distance between the tip end 40 U 1 and the tip end 40 U 2 in the same phase is narrowed and a distance between the tip end 40 U 2 and the tip end 40 V 1 in different phases is widened, so that the relationship of the tip-end distance G 1 a >the tip-end distance G 2 a is established.
  • another conductor segment 32 U 1 in the same phase to be joined to the tip end 40 U 1 of the conductor segment 32 U 1 is bent by another jig 64 in a reverse direction along the circumferential direction, so that the tip ends 40 of the conductor segments 32 in the same phase are placed at a position where they abut with each other.
  • Other conductor segments 32 V 1 , 32 V 2 , 32 W 1 , 32 W 2 are also bent in the same manner.
  • step S 30 contacting parts between the tip ends 40 U 1 of the conductor segments 32 U 1 in the same phase are irradiated with laser so that those parts are welded to each other.
  • Laser welding can perform heating locally, and therefore, even if the tip ends are placed closely, only desired tip ends 40 U 1 can be welded.
  • the plurality of conductor segments 32 U 1 can be connected electrically.
  • a distance between the tip ends 40 in the same phase can be narrowed and a distance between the tip ends 40 in different phases can be widened. Further, a creepage distance between the tip ends 40 in different phases can be also increased. As illustrated in FIG. 4 , for example, a distance (a different-phase distance) in the circumferential direction and the axial direction between the tip end 40 U 2 and the tip end 40 V 1 in different phases can be made larger than a distance (a same-phase distance) between the tip end 40 U 1 and the tip end 40 U 2 in the same phase. This makes it possible to improve an insulating property of the tip ends 40 in different phases between which a potential difference is large. As a result, it is not necessary to coat the tip ends 40 with the insulation resin, which does not require an insulation step of the tip ends 40 , thereby making it possible to restrain an increase in cost.
  • a distance between the conductor segments 32 in the same phase can be narrowed and a distance between the conductor segments 32 in different phases can be widened. This makes it possible to improve an insulating property between the conductor segments 32 in different phases. Further, the coating of the insulation resin that coats the conductor segments 32 can be reduced in thickness, thereby making it possible to reduce a used amount of the insulation resin.
  • tip ends 40 intersecting at the time when the linear parts 50 of the conductor segments 32 are bent are welded by laser, thereby making it is possible to shorten a length of the stator 20 in the axial direction. This consequently makes it possible to downsize the stator 20 while securing the insulating property of the tip ends 40 and the conductor segments 32 .
  • FIG. 10 illustrates a bending operation of the conductor segment 32 U 1 and the conductor segment 32 U 2 adjacent to the conductor segment 32 U 1 .
  • a bending operation of the conductor segment 32 U 1 is the same as the bending operation of the conductor segment 32 U 1 illustrated in FIG. 9 , and therefore, a description thereof is omitted.
  • a bending operation of the conductor segment 32 U 2 by the protrusion 73 will be described.
  • the protrusion 73 presses down (bends) the conductor segment 32 U 2 in conjunction with the moving-down and rotating of the protrusion 71 .
  • an operation from a position H 1 c to a position H 4 c is the same as the operation from the position H 1 b to the position H 4 b illustrated in FIG. 9 .
  • the protrusion 73 stops a rotative motion at the position H 4 c and stays at the position H 4 c .
  • a moving-down operation is kept performed, so that the protrusion 73 moves from the position H 4 c to a position H 5 c along the axial direction.
  • the tip end 40 U 2 abuts with the position defining surface 73 b of the protrusion 73 , so that the tip end 40 U 2 moves to the position H 5 c together with the protrusion 73 .
  • the position H 4 c and the position H 5 c are a position short from the position H 5 a in the circumferential direction only by a distance L 1 , and this distance L 1 is the same distance as the distance L 1 illustrated in FIG. 3 . That is, the tip end 40 U 2 stays at a position short from the tip end 40 U 1 only by the distance L 1 . Because of this, the tip end 40 U 2 approaches the tip end 40 U 1 . Further, a movement locus at the time when the protrusion 73 moves from the position H 1 c to the position H 5 c is indicated by a reference sign K 3 , and the movement locus K 3 is extracted to be illustrated in a characteristic view.
  • the protrusion 73 stops rotating during the rotation, so that its movement in the circumferential direction is stopped and the protrusion 73 stays at this position. Since the protrusion 73 stays, the tip end 40 U 2 stays at a position short from the tip end 40 U 1 only by the distance L 1 and approaches the tip end 40 U 1 as illustrated in FIG. 3 . As a result, as illustrated in FIG.
  • the distance between the tip end 40 U 1 and the tip end 40 U 2 in the same phase is narrowed and the distance between the tip end 40 U 2 and the tip end 40 V 1 in different phases is widened, so that the relationship of the tip-end distance G 1 a >the tip-end distance G 2 a is established.
  • the distance between the tip ends 40 in the same phase can be narrowed and the distance between the tip ends 40 in different phases can be widened in the circumferential direction and in the axial direction.
  • the distance (the different-phase distance) in the circumferential direction and the axial direction between the tip end 40 U 2 and the tip end 40 V 1 in different phases can be made larger than the distance (the same-phase distance) between the tip end 40 U 1 and the tip end 40 U 2 .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Windings For Motors And Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
US15/914,443 2017-03-10 2018-03-07 Stator for rotary electric machine and manufacturing apparatus thereof Abandoned US20180262071A1 (en)

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US16/905,226 US11557931B2 (en) 2017-03-10 2020-06-18 Stator with dual jig arrangement

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JP2017046464A JP6642494B2 (ja) 2017-03-10 2017-03-10 回転電機のステータの製造装置
JP2017-046464 2017-03-10

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US16/905,226 Continuation US11557931B2 (en) 2017-03-10 2020-06-18 Stator with dual jig arrangement

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JP (1) JP6642494B2 (zh)
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Publication number Priority date Publication date Assignee Title
WO2021095063A1 (en) * 2019-11-12 2021-05-20 Mavel edt S.p.A. Synchronous electric machine with reluctance assisted by permanent magnets and process for making such electric machine
US20210273537A1 (en) * 2018-11-16 2021-09-02 Kabushiki Kaisha Toshiba Method of manufacturing stator

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CN108574353A (zh) 2018-09-25
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US11557931B2 (en) 2023-01-17
CN108574353B (zh) 2020-05-29

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