CN113472099A

CN113472099A - Stator of rotating electric machine

Info

Publication number: CN113472099A
Application number: CN202110344385.3A
Authority: CN
Inventors: 井上雅志
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2020-03-30
Filing date: 2021-03-30
Publication date: 2021-10-01
Also published as: JP2021164205A

Abstract

Provided is a stator for a rotating electrical machine, which can reduce the manufacturing cost of a segment conductor. A stator (10) of a rotating electric machine is provided with: a stator core (20); and a coil (30) that is formed from a plurality of phase windings (U1, U2, V1, V2, W1, W2) that are formed from a plurality of segment conductors (40) that are inserted into a plurality of slots (22) of the stator core (20). The segment conductor (40) is formed in a substantially U-shape and includes: a pair of leg portions (41) that extend parallel to each other, are disposed inside the slot (22), and extend substantially linearly in the axial direction; and a bent portion (42) connecting the 2 nd end portions (41b) of the leg portions (41) to each other. The 1 st end (41a) of the pair of legs (41) is formed with a diagonal portion (43) extending diagonally in the circumferential direction and a tip portion (44) extending axially outward from the tip of the diagonal portion (43). The coil (30) is composed of a plurality of segment conductors (40) having a single shape.

Description

Stator of rotating electric machine

Technical Field

The present invention relates to a stator of a rotating electric machine, and more particularly, to a stator of a rotating electric machine including a coil in which a plurality of segment conductors are inserted into slots.

Background

Conventionally, there is known a stator of a rotating electric machine, which includes: a stator core; and a coil including windings of the U-phase, the V-phase, and the W-phase, the windings of the U-phase, the V-phase, and the W-phase being formed of a plurality of segment conductors inserted in a row in a radial direction into respective slots of a plurality of slots formed in a circumferential direction of the stator core.

For example, patent document 1 discloses a stator of a rotating electric machine in which a plurality of U-shaped segment conductors each having an oblique portion formed on an open side thereof are inserted into respective slots to form a coil.

Prior art documents

Patent document 1: japanese laid-open patent publication No. 2012-29370

However, in the stator of the rotating electric machine of patent document 1, since the U-shaped segment conductors constituting the coil have various shapes, the number of winding machines for forming the oblique portions of the segment conductors is required to be equal to the number of types of segment conductors when manufacturing the segment conductors, and there is a problem that the cost of manufacturing equipment becomes high. Further, while the oblique portion of the segment conductor of the predetermined type is formed, the segment conductors of the other types are in a standby state, and therefore, there is a problem that the operation rate of the manufacturing equipment is lowered and the productivity of the segment conductor is lowered.

Disclosure of Invention

The invention provides a stator of a rotating electrical machine, which can restrain the cost of manufacturing equipment to be low, can improve the operation rate of the manufacturing equipment and can reduce the manufacturing cost of a segmented conductor.

The present invention is a stator for a rotating electric machine, comprising:

a substantially annular stator core having a plurality of teeth protruding radially inward at predetermined intervals along a circumferential direction and a plurality of slots serving as spaces between the teeth adjacent to each other in the circumferential direction; and

a coil configured of windings of a plurality of phases formed by a plurality of segment conductors inserted into the plurality of slots;

each of the segment conductors has a substantially U-shape, and includes:

a pair of legs extending parallel to each other, having a 1 st end and a 2 nd end, disposed inside the slot, and extending substantially linearly in an axial direction; and

a bent portion connecting the 2 nd end portions of the pair of leg portions to each other,

the 1 st end portions of the pair of leg portions protrude outward from the 1 st end surface in the axial direction of the stator core, and are formed with a diagonal portion extending diagonally in the 1 st direction or the 2 nd direction in the circumferential direction and a tip end portion extending outward in the axial direction from a tip end of the diagonal portion,

the bent portion protrudes outward from a 2 nd end surface in an axial direction of the stator core,

the coil has:

an open-side coil end portion formed by the skew portion and the tip portion of the segment conductor and protruding axially outward from the 1 st end surface of the stator core; and

a closed-side coil end portion formed by the bent portions of the segment conductors and protruding axially outward from the 2 nd end surface of the stator core,

a plurality of slots into which the leg portions of the segment conductors are inserted in a row in a radial direction,

wherein the content of the first and second substances,

the coil is constituted by a plurality of the segment conductors having a single shape.

Effects of the invention

According to the present invention, since the plurality of U-shaped segment conductors constituting the coil have a single shape, the cost of manufacturing equipment can be kept low, the operating rate of the manufacturing equipment can be increased, and the manufacturing cost of the segment conductors can be reduced.

Drawings

Fig. 1 is a view of a stator of a rotating electric machine according to an embodiment of the present invention, as viewed from the radially outer side.

Fig. 2 is a sectional view of a stator of the rotating electric machine of fig. 1 as viewed from an axial direction.

Fig. 3 is a perspective view of a segment conductor of a stator of the rotating electric machine of fig. 1.

Fig. 4 is a main portion perspective view of a stator of the rotating electric machine of fig. 1.

Fig. 5A is a part of an expanded view showing a structure in which the windings of the coils of the U-phase, V-phase, and W-phase phases of the stator of the rotating electric machine of fig. 1 are wound in the slots.

Fig. 5B is a part of an expanded view showing a structure in which the windings of the coils of the U-phase, V-phase, and W-phase phases of the stator of the rotating electric machine of fig. 1 are wound in the slots.

Fig. 6A is a part of an expanded view showing a structure in which the winding V1 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 6B is a part of an expanded view showing a structure in which the winding V1 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 6C is a part of an expanded view showing a structure in which the winding V1 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 6D is a part of an expanded view showing a structure in which the winding V1 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 7A is a part of an expanded view showing a structure in which the winding V2 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 7B is a part of an expanded view showing a structure in which the winding V2 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 7C is a part of an expanded view showing a structure in which the winding V2 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Fig. 7D is a part of an expanded view showing a structure in which the winding V2 of the stator of the rotating electric machine of fig. 5A and 5B is wound around each slot.

Description of reference numerals:

10 a stator;

20 a stator core;

201, 1 st end face;

202, 2 nd end face;

21 teeth;

22 slot;

30 coils;

31 opening the side coil end;

32 closing the side coil ends;

40 a segmented conductor;

41 legs;

41a, end 1;

41b, 2 nd end;

42 a curved portion;

43 diagonal parts;

44 a front end portion;

51U 1U phase lead out line (lead out line);

a 52U 2U phase lead-out line (outgoing line);

a 51V 1 st V phase lead line (lead line);

a 52V 2V phase lead out line (lead out line);

51W 1W phase lead out line (lead out line);

a 52W 2W phase lead out line (lead out line);

a 61U 1U phase bridge;

a 62U 2U phase bridge (bridge);

a 61V 1V phase bridge (bridge);

a 62V 2V phase bridge (bridge);

a 61W 1W phase bridge (bridge);

a 62W 2W phase bridge (bridge);

70 neutral point;

windings of U1, U2, V1, V2, W1 and W2.

Detailed Description

Hereinafter, an embodiment of a stator of a rotating electric machine according to the present invention will be described with reference to the drawings.

< integral Structure of stator >

As shown in fig. 1 and 2, a stator 10 of a rotating electric machine according to the present embodiment includes a substantially annular stator core 20 and a coil 30 assembled to the stator core 20.

For the sake of simplicity and clarity of description, the terms axial direction, radial direction, and circumferential direction refer to a direction based on the center axis CL of the stator 10 and the stator core 20. The axially inner side is a center side of the stator 10 in the axial direction, and the axially outer side is a side apart from the center of the stator 10 in the axial direction.

The stator core 20 has a substantially annular shape, and includes a plurality of teeth 21 protruding radially inward at predetermined intervals along the circumferential direction, and a plurality of slots 22 serving as spaces between circumferentially adjacent teeth 21. In the present embodiment, the stator core 20 has 72

teeth

21, and 72 slots 22 are formed. The stator core 20 is formed as a laminated core in which a plurality of electromagnetic steel sheets having a predetermined thickness are laminated in the axial direction. The stator core 20 has a 1 st end surface 201 and a 2 nd end surface 202 in the axial direction.

The coil 30 is assembled to the stator core 20, and is formed with an open-side coil end 31 that protrudes axially outward from the 1 st end face 201 of the stator core 20 and a closed-side coil end 32 that protrudes axially outward from the 2 nd end face 202 of the stator core 20.

The coil 30 has a plurality of segment conductors 40 inserted into respective ones of the 72 slots 22.

As shown in fig. 3, the segment conductor 40 is provided with an insulating coating portion 402 on a conductor portion 401 having a substantially rectangular cross section. The segment conductor 40 has a substantially U-shape, and includes a pair of leg portions 41 extending parallel to each other and having a 1 st end portion 41a and a 2 nd end portion 41b, and a bent portion 42 connecting the 2 nd end portions 41b of the pair of leg portions 41 to each other. The segment conductor 40 is arranged such that the pair of leg portions 41 are inserted into different slots 22 of the stator core 20, respectively, and the bent portion 42 protrudes axially outward from the 2 nd end surface 202 of the stator core 20, and forms a protruding portion 400 protruding axially outward from the 1 st end surface 201 of the stator core 20.

The tip of the jig holding projection 400, not shown, is axially close to the stator core 20 and is rotated in the circumferential direction, so that the projection 400 is bent in the circumferential direction of the stator core 20. Thus, the protrusion 400 has a shape, as viewed from the 2 nd end surface 202 side of the stator core 20, including the diagonal portion 43 extending while being bent in the clockwise direction or the counterclockwise direction in the circumferential direction, and the tip portion 44 which is the tip portion of the protrusion 400 held by the jig and extends from the tip of the diagonal portion 43 to the outside in the axial direction of the stator core 20.

The slant portions 43 and the tip portions 44 of the segment conductors 40 inserted into the slots 22 of the 72 slots 22 form the open-side coil end 31 of the coil 30, and the bent portions 42 of the segment conductors 40 form the closed-side coil end 32 of the coil 30.

In the present embodiment, the leg portions 41 of the segment conductors 40 of 8 layers are inserted into the slots 22 of the stator core 20 in a row in the radial direction. That is, the 1 st leg 411 disposed on the 1 st layer, the 2 nd leg 412 disposed on the 2 nd layer, the 3 rd leg 413 disposed on the 3 rd layer, the 4 th leg 414 disposed on the 4 th layer, the 5 th leg 415 disposed on the 5 th layer, the 6 th leg 416 disposed on the 6 th layer, the 7 th leg 417 disposed on the 7 th layer, and the 8 th leg 418 disposed on the 8 th layer are inserted into each slot 22 of the stator core 20 from the radial inner side.

< Structure of coil based on segmented conductor >

Next, the structure of the coil 30 based on the segment conductors 40 inserted into the slots 22 of the stator core 20 will be described with reference to fig. 4 to 7D. For simplicity and clarity of description, for the 72 slots 22 of the stator core 20, the 1 st slot 2201 to the 72 th slot 2272 are clockwise as viewed from the 2 nd end surface 202 side of the stator core 20 as shown in fig. 2 for convenience. In fig. 5A, 5B, 6A to 6D, and 7A to 7D, the numbers shown in the upper part indicate slot numbers, and 1 to 72 correspond to the 1 st slot 2201 to the 72 th slot 2272, respectively. Layer nos shown surrounded by circles at the left end indicate layer numbers of the leg portions 41 inserted into the

slots

22, and 1 to 8 correspond to the 1 st leg portion 411 to the 8 th leg portion 418, respectively.

As shown in fig. 4, U-phase lead line 50U, V and phase lead line 50V, W and phase lead line 50W are connected to coil 30. U-phase lead line 50U, V and phase lead line 50V, W are electrically connected to a power converter, not shown, or the like. The coil 30 is formed of 3-phase coils, i.e., a U-phase coil 30U, V-phase coil 30V, W-phase coil 30W (see fig. 5B). U-phase coil 30U is electrically connected to U-phase lead line 50U. The V-phase coil 30V is electrically connected to the V-phase lead line 50V. W-phase coil 30W is electrically connected to W-phase lead line 50W. When the rotating electric machine is driven as a motor, the U-phase lead line 50U, V and the U-phase lead line 50V, W and the W-phase lead line 50W supply U-phase ac power, V-phase ac power, and W-phase ac power, which are 3-phase ac power supplied from a power conversion device or the like, not shown, to the U-phase coil 30U, V and the phase coil 30V, W and the like. When the rotating electrical machine is driven as a generator, U-phase lead-out line 50U, V and phase lead-out line 50V, W and phase lead-out line 50W supply U-phase ac power, V-phase ac power, and W-phase ac power, respectively, of 3-phase ac power generated by the rotating electrical machine to a power conversion device and the like, not shown.

In the present embodiment, U-phase lead line 50U has 2 lead lines, i.e., 1U-phase lead line 51U and 2U-phase lead line 52U. V-phase lead line 50V has 2 lead lines, i.e., 1V-th phase lead line 51V and 2V-th phase lead line 52V. W-phase lead line 50W has 2 lead lines, i.e., 1W-th phase lead line 51W and 2W-th phase lead line 52W. A 1U-th phase lead-out line 51U and a 2U-th phase lead-out line 52U, a 1V-th phase lead-out line 51V and a 2V-th phase lead-out line 52V, and a 1W-th phase lead-out line 51W and a 2W-th phase lead-out line 52W are electrically connected to the front end portion 44 of the predetermined segment conductor 40, respectively. Details of the 1U-th and 2U-th

phase lead lines

51U and 52U, the 1V-th and 2V-th

phase lead lines

51V and 52V, and the 1W-th and 2W-th

phase lead lines

51W and 52W are electrically connected to the tip portion 44 of the segment conductor 40 inserted into which slot 22 is inserted, respectively, will be described later.

The coil 30 includes a 1U-phase bridge 61U and a 2U-phase bridge 62U, a 1V-phase bridge 61V and a 2V-phase bridge 62V, and a 1W-phase bridge 61W and a 2W-phase bridge 62W. The 1U-phase bridge 61U and the 2U-phase bridge 62U, the 1V-phase bridge 61V and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W are all conductors, and may be covered with insulation or not covered with insulation. The 1U-phase bridge 61U and the 2U-phase bridge 62U, the 1V-phase bridge 61V and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W all extend in the circumferential direction on the axially outer side of the coil 30, and both end portions are electrically connected to the tip portions 44 of the different segment conductors 40, respectively. Details of the 1U-phase bridge 61U and the 2U-phase bridge 62U, the 1V-phase bridge 61V and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W are described later, which are electrically connected to the tip 44 of the segment conductor 40 inserted into which slot 22.

A neutral point 70 is connected to the coil 30. The neutral point 70 is a conductor, and may or may not be covered with insulation. In the present embodiment, the neutral point 70 extends in the circumferential direction on the radially outer side of the coil 30, and is electrically connected to the tip end portions 44 of the plurality of segment conductors 40. The neutral point 70 is electrically connected to the tip 44 of the segment conductor 40 inserted into the slot 22, which will be described later in detail.

As shown in fig. 5A, 5B, 6A to 6D, and 7A to 7D, when viewed from the 2 nd end surface 202 side of the stator core 20, the 2 nd end portion 41B of the 8 th leg portion 418 and the 2 nd end portion 41B of the 7 th leg portion 417 inserted into the counterclockwise 7 th slot 22 in the circumferential direction are connected by the bent portion 42 on the closed-side coil end portion 32 side of the coil 30, and become a pair of leg portions 41 of the U-shaped segment conductor 40. The 2 nd end portion 41b of the 6 th leg portion 416 and the 2 nd end portion 41b of the 5 th leg portion 415 inserted into the 7 th counterclockwise slot 22 in the circumferential direction are connected by the bent portion 42, and form a pair of leg portions 41 of the U-shaped segment conductor 40. The 2 nd end portion 41b of the 4 th leg portion 414 and the 2 nd end portion 41b of the 3 rd leg portion 413 inserted into the 7 th counterclockwise slot 22 in the circumferential direction are connected by the bent portion 42 to form a pair of leg portions 41 of the U-shaped segment conductor 40. The 2 nd end portion 41b of the 2 nd leg portion 412 and the 2 nd end portion 41b of the 1 st leg portion 411 inserted into the slot 22 of the 7 th counterclockwise in the circumferential direction are connected by the bent portion 42 to form a pair of leg portions 41 of the U-shaped segment conductor 40.

Further, the slant portions 43 of the 1 st leg portion 411, the 3 rd leg portion 413, the 5 th leg portion 415, and the 7 th leg portion 417, which are inserted into the 4-layer leg portions 41 of the slots 22 of the stator core 20, are diagonally oriented in the circumferential direction counterclockwise when viewed from the 2 nd end surface 202 side of the stator core 20 on the open side coil end 31 side of the coil 30. The diagonal portions 43 of the 2 nd, 4 th, 6 th and 8

th leg portions

412, 414, 416, 418 are diagonal in the clockwise direction in the circumferential direction.

The 1 st leg 411 has a distal end portion 44 that is electrically connected to, except for a part thereof, a distal end portion 44 of the 2 nd leg 412 inserted into the 5 th slot 22 counterclockwise in the circumferential direction, and a 1 st joint portion 451 is formed. The distal end portion 44 of the 3 rd leg 413 is electrically connected to the distal end portion 44 of the 4 th leg 414 inserted into the 5 th counterclockwise slot 22 in the circumferential direction, except for a part thereof, and a 2 nd engaging portion 452 is formed. The distal end portion 44 of the 5 th leg 415 is electrically connected to, except for a part thereof, the distal end portion 44 of the 6 th leg 416 inserted into the 5 th counterclockwise slot 22 in the circumferential direction, and a 3 rd engagement portion 453 is formed. The 7 th leg 417 is formed with a 4 th engagement portion 454, except for a part, which is electrically connected to the tip 44 of the 8 th leg 418 inserted into the 5 th counterclockwise slot 22 in the circumferential direction.

A part of tip portion 44 of 1 st leg 411 is electrically connected to any one of 1 st

U-phase bridge

61U, 2 nd

U-phase bridge

62U, 1 st V-

phase bridge

61V, 2 nd V-

phase bridge

62V, 1 st W-

phase bridge

61W, and 2 nd W-phase bridge 62W. The distal end 44 of a part of the 2 nd leg 412 is electrically connected to the distal end 44 of a part of the 3 rd leg 413, and a 5 th joint 455 is formed. The 3 rd leg 413 forming the 5 th joint 455 is inserted into the 5 th slot 22 clockwise from the 2 nd leg 412 forming the 5 th joint 455. The leading end 44 of a part of the 4 th leg 414 is electrically connected to the leading end 44 of a part of the 5 th leg 415, and a 6 th joint 456 is formed. The 5 th leg 415 forming the 6 th joint 456 is inserted into the 5 th slot 22 clockwise in the circumferential direction from the 4 th leg 414 forming the 5 th joint 455. The tip 44 of the 6 th leg 416 is electrically connected to the tip 44 of the 7 th leg 417, and a 7 th joint 457 is formed. The 7 th leg 417 forming the 7 th joint portion 457 is inserted into the 5 th insertion groove 22 clockwise in the circumferential direction from the 6 th leg 416 forming the 7 th joint portion 457. A front end 44 of a part of 8 th leg 418 is electrically connected to any one of 1U-phase lead-out line 51U, 2U-phase lead-out line 52U, 1V-phase lead-out line 51V, 2V-phase lead-out line 52V, 1W-phase lead-out line 51W, and 2W-phase lead-out line 52W, or neutral point 70.

Therefore, when viewed from the 2 nd end surface 202 side of the stator core 20, the U-shaped segment conductors 40 are arranged at positions shifted by 1 layer in the radial direction by 7 slots in the circumferential direction through the bent portions 42, the inclined portions 43 are inclined in the direction of being separated from each other in the circumferential direction, and the tip end portions 44 are electrically connected to the tip end portions 44 of the leg portions 41 of the U-shaped segment conductors 40 adjacent in the radial direction and separated by 5 slots in the circumferential direction.

In this way, the coil 30 is constituted by a plurality of U-shaped segment conductors 40 having a single shape.

When the U-shaped segment conductor 40 constituting the coil 30 has a plurality of shapes, the number of winding machines for forming the slant portion 43 of the segment conductor 40 is required to be equal to the number of types of the segment conductors 40 when manufacturing the segment conductor 40, and therefore, the cost of manufacturing equipment becomes high. Further, while the slant portion 43 of the segment conductor 40 of the predetermined type is formed, the segment conductors 40 of the other types are in a standby state, and therefore, the operation rate of the manufacturing equipment is lowered, and the productivity of the segment conductor 40 is lowered. In the present embodiment, since the plurality of U-shaped segment conductors 40 constituting the coil 30 have a single shape, the cost of manufacturing equipment can be kept low, and the operating rate of manufacturing equipment can be increased, and the manufacturing cost of the segment conductors 40 can be reduced.

The bent portion 42 is bent so as to be shifted by 1 layer in the radial direction in a state where the pair of leg portions 41 of the U-shaped segment conductor 40 are inserted into the respective slots 22.

Therefore, the pair of leg portions 41 of the U-shaped segment conductor 40 are offset by 1 layer in the radial direction, and therefore the degree of bending of the bent portion 42 in the radial direction can be reduced. This can facilitate the formation of the bent portion 42, and therefore can reduce the manufacturing cost of the segment conductor 40.

Next, with reference to fig. 6A to 6D and fig. 7A to 7D, the configuration of V-phase coil 30V among the 3-phase coils, i.e., U-phase coil 30U, V-phase coil 30V, W-phase coil 30W constituting coil 30, will be described.

The V-phase coil 30V is formed by connecting 2 windings V1 and V2 in parallel. One end portion of the winding V1 is formed by the tip portion 44 of the 8 th leg 418 inserted into the 5 th slot 2205, and is electrically connected to the 1 st phase lead line 51V. One end portion of the winding V2 is formed by the tip portion 44 of the 8 th leg 418 inserted into the 6 th slot 2206, and is electrically connected to the 2 nd phase lead line 52V. The other end portions of the windings V1, V2 are electrically connected to the neutral point 70.

As shown in fig. 6A to 6D, the winding V1 starts at the tip 44 of the 8 th leg 418 inserted into the 5 th slot 2205 on the open-side coil end 31 side, and the 8 th leg 418 inserted into the 5 th slot 2205 is connected to the 7 th leg 417 inserted into the 70 th slot 2270 on the closed-side coil end 32 side by the bent portion 42. The 7 th leg 417 inserted into the 70 th insertion groove 2270 is connected to the 8 th leg 418 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 4 th engagement portion 454. The 8 th leg 418 inserted into the 65 th insertion groove 2265 is connected to the 7 th leg 417 inserted into the 58 th insertion groove 2258 by the bent portion 42 on the closed side coil end 32 side. The 7 th leg portion 417 inserted into the 58 th slot 2258 is connected to the 8 th leg portion 418 inserted into the 53 th slot 2253 at the open-side coil end 31 side by the 4 th joint 454. The 8 th leg 418 inserted into the 53 th slot 2253 is connected to the 7 th leg 417 inserted into the 46 th slot 2246 by the bent portion 42 on the closed-side coil end 32 side. The 7 th leg 417 inserted into the 46 th slot 2246 is connected to the 8 th leg 418 inserted into the 41 th slot 2241 at the open side coil end 31 side by the 4 th joint 454. The 8 th leg 418 inserted into the 41 th slot 2241 is connected to the 7 th leg 417 inserted into the 34 th slot 2234 by the bent portion 42 on the closed-side coil end 32 side. The 7 th leg portion 417 inserted into the 34 th slot 2234 is connected to the 8 th leg portion 418 inserted into the 29 th slot 2229 at the open side coil end 31 side by the 4 th engaging portion 454. The 8 th leg portion 418 inserted into the 29 th slot 2229 is connected to the 7 th leg portion 417 inserted into the 22 nd slot 2222 at the closed side coil end portion 32 side by the bent portion 42. The 7 th leg portion 417 inserted into the 22 nd slot 2222 is connected to the 8 th leg portion 418 inserted into the 17 th slot 2217 at the open side coil end portion 31 side by the 4 th joint 454. The 8 th leg 418 inserted into the 17 th slot 2217 is connected to the 7 th leg 417 inserted into the 10 th slot 2210 at the closed-side coil end 32 side by the bent portion 42. The 7 th leg 417 inserted into the 10 th slot 2210 is connected to the 6 th leg 416 inserted into the 5 th slot 2205 at the open side coil end 31 side by a 7 th joint 457.

The 6 th leg 416 inserted into the 5 th slot 2205 is connected to the 5 th leg 415 inserted into the 70 th slot 2270 by the bent portion 42 on the closed side coil end 32 side. The 5 th leg 415 inserted into the 70 th insertion groove 2270 is connected to the 6 th leg 416 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 3 rd joint 453. The 6 th leg 416 inserted into the 65 th insertion groove 2265 is connected to the 5 th leg 415 inserted into the 58 th insertion groove 2258 at the closed side coil end 32 side by the bent portion 42. The 5 th leg portion 415 inserted into the 58 th slot 2258 is connected to the 6 th leg portion 416 inserted into the 53 th slot 2253 at the open-side coil end 31 side by the 3 rd joint 453. The 6 th leg 416 inserted into the 53 th slot 2253 is connected to the 5 th leg 415 inserted into the 46 th slot 2246 by the bent portion 42 on the closed-side coil end 32 side. The 5 th leg 415 inserted into the 46 th slot 2246 is connected to the 6 th leg 416 inserted into the 41 th slot 2241 at the open-side coil end 31 side by the 3 rd joint 453. The 6 th leg 416 inserted into the 41 st slot 2241 is connected to the 5 th leg 415 inserted into the 34 th slot 2234 by the bent portion 42 on the closed-side coil end 32 side. The 5 th leg portion 415 inserted into the 34 th slot 2234 is connected to the 6 th leg portion 416 inserted into the 29 th slot 2229 at the open side coil end 31 side by the 3 rd joint 453. The 6 th leg portion 416 inserted into the 29 th slot 2229 is connected to the 5 th leg portion 415 inserted into the 22 nd slot 2222 at the closed side coil end portion 32 side by the bent portion 42. The 5 th leg portion 415 inserted into the 22 nd slot 2222 is connected to the 6 th leg portion 416 inserted into the 17 th slot 2217 by the 3 rd joint 453 on the open side coil end portion 31 side. The 6 th leg 416 inserted into the 17 th slot 2217 is connected to the 5 th leg 415 inserted into the 10 th slot 2210 at the closed side coil end 32 side by the bent portion 42. The 5 th leg 415 inserted into the 10 th slot 2210 is connected to the 4 th leg 414 inserted into the 5 th slot 2205 at the open side coil end 31 side by the 6 th joint 456.

The 4 th leg portion 414 inserted into the 5 th insertion groove 2205 is connected to the 3 rd leg portion 413 inserted into the 70 th insertion groove 2270 at the closed side coil end portion 32 side by the bent portion 42. The 3 rd leg 413 inserted into the 70 th insertion groove 2270 is connected to the 4 th leg 414 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 65 th insertion groove 2265 is connected to the 3 rd leg 413 inserted into the 58 th insertion groove 2258 at the closed side coil end 32 side by the bent portion 42. The 3 rd leg portion 413 inserted into the 58 th insertion groove 2258 is connected to the 4 th leg portion 414 inserted into the 53 th insertion groove 2253 at the open side coil end 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 53 th slot 2253 is connected to the 3 rd leg 413 inserted into the 46 th slot 2246 by the bent portion 42 on the closed-side coil end 32 side. The 3 rd leg 413 inserted into the 46 th slot 2246 is connected to the 4 th leg 414 inserted into the 41 th slot 2241 at the open side coil end 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 41 th slot 2241 is connected to the 3 rd leg 413 inserted into the 34 th slot 2234 by the bent portion 42 on the closed-side coil end 32 side. The 3 rd leg portion 413 inserted into the 34 th slot 2234 is connected to the 4 th leg portion 414 inserted into the 29 th slot 2229 at the open side coil end 31 side by the 2 nd joint 452. The 4 th leg portion 414 inserted into the 29 th slot 2229 is connected to the 3 rd leg portion 413 inserted into the 22 nd slot 2222 at the closed side coil end portion 32 side by the bent portion 42. The 3 rd leg portion 413 inserted into the 22 nd slot 2222 is connected to the 4 th leg portion 414 inserted into the 17 th slot 2217 at the open side coil end portion 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 17 th slot 2217 is connected to the 3 rd leg 413 inserted into the 10 th slot 2210 at the closed side coil end 32 side by the bent portion 42. The 3 rd leg 413 inserted into the 10 th slot 2210 is connected to the 2 nd leg 412 inserted into the 5 th slot 2205 at the open side coil end 31 side by the 5 th joint 455.

The 2 nd leg portion 412 inserted into the 5 th slot 2205 is connected to the 1 st leg portion 411 inserted into the 70 th slot 2270 at the closed side coil end portion 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 70 th slot 2270 is connected to the 2 nd leg portion 412 inserted into the 65 th slot 2265 at the open side coil end 31 side by the 1 st joint 451. The 2 nd leg portion 412 inserted into the 65 th insertion groove 2265 is connected to the 1 st leg portion 411 inserted into the 58 th insertion groove 2258 at the closed side coil end 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 58 th slot 2258 is connected to the 2 nd leg portion 412 inserted into the 53 th slot 2253 at the open-side coil end 31 side by the 1 st joint 451. The 2 nd leg portion 412 inserted into the 53 rd slot 2253 is connected to the 1 st leg portion 411 inserted into the 46 th slot 2246 by the bent portion 42 on the closed-side coil end portion 32 side. The 1 st leg 411 inserted into the 46 th slot 2246 is connected to the 2 nd leg 412 inserted into the 41 st slot 2241 at the open side coil end 31 side by the 1 st joint 451. The 2 nd leg portion 412 inserted into the 41 st slot 2241 is connected to the 1 st leg portion 411 inserted into the 34 th slot 2234 at the closed-side coil end portion 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 34 th slot 2234 is connected to the 2 nd leg portion 412 inserted into the 29 th slot 2229 at the open side coil end 31 side by the 1 st joint portion 451. The 2 nd leg portion 412 inserted into the 29 th slot 2229 is connected to the 1 st leg portion 411 inserted into the 22 nd slot 2222 at the closed side coil end portion 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 22 nd slot 2222 is connected to the 2 nd leg portion 412 inserted into the 17 th slot 2217 at the open side coil end portion 31 side by the 1 st joint portion 451. The 2 nd leg 412 inserted into the 17 th slot 2217 is connected to the 1 st leg 411 inserted into the 10 th slot 2210 at the closed side coil end 32 side by the bent portion 42. The 1 st leg 411 inserted into the 10 th slot 2210 is connected to the 1 st V-phase bridge 61V on the open side coil end 31 side and to the 1 st leg 411 inserted into the 5 th slot 2205 via the 1 st V-phase bridge 61V.

The 1 st leg 411 inserted into the 5 th slot 2205 is connected to the 2 nd leg 412 inserted into the 12 th slot 2212 by the bent portion 42 on the closed-side coil end portion 32 side. The 2 nd leg portion 412 inserted into the 12 th slot 2212 is connected to the 1 st leg portion 411 inserted into the 17 th slot 2217 at the open side coil end portion 31 side by the 1 st joint portion 451. The 1 st leg portion 411 inserted into the 17 th slot 2217 is connected to the 2 nd leg portion 412 inserted into the 24 th slot 2224 at the closed side coil end portion 32 side by the bent portion 42. The 2 nd leg portion 412 inserted into the 24 th slot 2224 is connected to the 1 st leg portion 411 inserted into the 29 th slot 2229 at the open side coil end portion 31 side by the 1 st joint portion 451. The 1 st leg portion 411 inserted into the 29 th slot 2229 is connected to the 2 nd leg portion 412 inserted into the 36 th slot 2236 by the bent portion 42 on the closed-side coil end portion 32 side. The 2 nd leg portion 412 inserted into the 36 th slot 2236 is connected to the 1 st leg portion 411 inserted into the 41 st slot 2241 at the open side coil end 31 side by the 1 st joint portion 451. The 1 st leg 411 inserted into the 41 st slot 2241 is connected to the 2 nd leg 412 inserted into the 48 th slot 2248 at the closed-side coil end 32 side by the bent portion 42. The 2 nd leg portion 412 inserted into the 48 th slot 2248 is connected to the 1 st leg portion 411 inserted into the 53 th slot 2253 at the open-side coil end portion 31 side by the 1 st joint portion 451. The 1 st leg 411 inserted into the 53 rd slot 2253 is connected to the 2 nd leg 412 inserted into the 60 th slot 2260 by the bent portion 42 on the closed-side coil end 32 side. The 2 nd leg portion 412 inserted into the 60 th insertion groove 2260 is connected to the 1 st leg portion 411 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 1 st joint 451. The 1 st leg portion 411 inserted into the 65 th insertion groove 2265 is connected to the 2 nd leg portion 412 inserted into the 72 th insertion groove 2272 by the bent portion 42 on the closed side coil end portion 32 side. The 2 nd leg portion 412 inserted into the 72 th slot 2272 is connected to the 3 rd leg portion 413 inserted into the 5 th slot 2205 at the open side coil end 31 side by the 5 th joint 455.

The 3 rd leg 413 inserted into the 5 th insertion slot 2205 is connected to the 4 th leg 414 inserted into the 12 th insertion slot 2212 at the closed side coil end 32 side by the bent portion 42. The 4 th leg 414 inserted into the 12 th insertion groove 2212 is connected to the 3 rd leg 413 inserted into the 17 th insertion groove 2217 at the open side coil end 31 side by the 2 nd joint 452. The 3 rd leg portion 413 inserted into the 17 th slot 2217 is connected to the 4 th leg portion 414 inserted into the 24 th slot 2224 at the closed side coil end portion 32 side by the bent portion 42. The 4 th leg portion 414 inserted into the 24 th slot 2224 is connected to the 3 rd leg portion 413 inserted into the 29 th slot 2229 at the open side coil end 31 side by the 2 nd joint 452. The 3 rd leg portion 413 inserted into the 29 th slot 2229 is connected to the 4 th leg portion 414 inserted into the 36 th slot 2236 at the closed-side coil end 32 side by the bent portion 42. The 4 th leg portion 414 inserted into the 36 th slot 2236 is connected to the 3 rd leg portion 413 inserted into the 41 th slot 2241 by the 2 nd engaging portion 452 on the open side coil end 31 side. The 3 rd leg 413 inserted into the 41 th slot 2241 is connected to the 4 th leg 414 inserted into the 48 th slot 2248 at the closed-side coil end 32 side by the bent portion 42. The 4 th leg 414 inserted into the 48 th slot 2248 is connected to the 3 rd leg 413 inserted into the 53 th slot 2253 at the open-side coil end 31 side by the 2 nd joint 452. The 1 st leg 411 inserted into the 53 th insertion groove 2253 is connected to the 4 th leg 414 inserted into the 60 th insertion groove 2260 by the bent portion 42 on the closed-side coil end 32 side. The 4 th leg 414 inserted into the 60 th insertion groove 2260 is connected to the 3 rd leg 413 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 2 nd joint 452. The 3 rd leg 413 inserted into the 65 th insertion groove 2265 is connected to the 4 th leg 414 inserted into the 72 th insertion groove 2272 by the bent portion 42 on the closed side coil end 32 side. The 4 th leg portion 414 inserted into the 72 th insertion groove 2272 is connected to the 5 th leg portion 415 inserted into the 5 th insertion groove 2205 at the open side coil end 31 side by the 6 th joint 456.

The 5 th leg portion 415 inserted into the 5 th slot 2205 is connected to the 6 th leg portion 416 inserted into the 12 th slot 2212 by the bent portion 42 on the closed side coil end portion 32 side. The 6 th leg 416 inserted into the 12 th slot 2212 is connected to the 5 th leg 415 inserted into the 17 th slot 2217 at the open side coil end 31 side by the 3 rd joint 453. The 5 th leg portion 415 inserted into the 17 th slot 2217 is connected to the 6 th leg portion 416 inserted into the 24 th slot 2224 at the closed side coil end portion 32 side by the bent portion 42. The 6 th leg portion 416 inserted into the 24 th slot 2224 is connected to the 5 th leg portion 415 inserted into the 29 th slot 2229 at the open side coil end portion 31 side by the 3 rd joint 453. The 5 th leg portion 415 inserted into the 29 th slot 2229 is connected to the 6 th leg portion 416 inserted into the 36 th slot 2236 by the bent portion 42 on the closed-side coil end portion 32 side. The 6 th leg portion 416 inserted into the 36 th slot 2236 is connected to the 5 th leg portion 415 inserted into the 41 th slot 2241 at the open-side coil end 31 side by the 3 rd joint 453. The 5 th leg 415 inserted into the 41 th slot 2241 is connected to the 6 th leg 416 inserted into the 48 th slot 2248 by the bent portion 42 on the closed-side coil end portion 32 side. The 6 th leg 416 inserted into the 48 th slot 2248 is connected to the 5 th leg 415 inserted into the 53 th slot 2253 at the open-side coil end 31 side by the 3 rd joint 453. The 1 st leg 411 inserted into the 53 th insertion groove 2253 is connected to the 6 th leg 416 inserted into the 60 th insertion groove 2260 by the bent portion 42 on the closed-side coil end 32 side. The 6 th leg 416 inserted into the 60 th insertion groove 2260 is connected to the 5 th leg 415 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 3 rd joint 453. The 5 th leg portion 415 inserted into the 65 th insertion groove 2265 is connected to the 6 th leg portion 416 inserted into the 72 th insertion groove 2272 by the bent portion 42 on the closed side coil end portion 32 side. The 6 th leg portion 416 inserted into the 72 th slot 2272 is connected to the 7 th leg portion 417 inserted into the 5 th slot 2205 at the open side coil end 31 side by the 6 th joint 456.

The 7 th leg 417 inserted into the 5 th slot 2205 is connected to the 8 th leg 418 inserted into the 12 th slot 2212 by the bent portion 42 on the closed side coil end portion 32 side. The 8 th leg 418 inserted into the 12 th slot 2212 is connected to the 7 th leg 417 inserted into the 17 th slot 2217 at the open side coil end 31 side by the 4 th joint 454. The 7 th leg portion 417 inserted into the 17 th slot 2217 is connected to the 8 th leg portion 418 inserted into the 24 th slot 2224 at the closed side coil end portion 32 side by the bent portion 42. The 8 th leg portion 418 inserted into the 24 th slot 2224 is connected to the 7 th leg portion 417 inserted into the 29 th slot 2229 at the open side coil end portion 31 side by the 4 th joint portion 454. The 7 th leg portion 417 inserted into the 29 th slot 2229 is connected to the 8 th leg portion 418 inserted into the 36 th slot 2236 by the bent portion 42 on the closed side coil end portion 32 side. The 8 th leg portion 418 inserted into the 36 th slot 2236 is connected to the 7 th leg portion 417 inserted into the 41 th slot 2241 at the open-side coil end 31 side by the 4 th engaging portion 454. The 7 th leg 417 inserted into the 41 th slot 2241 is connected to the 8 th leg 418 inserted into the 48 th slot 2248 by the bent portion 42 on the closed-side coil end portion 32 side. The 8 th leg portion 418 inserted into the 48 th slot 2248 is connected to the 7 th leg portion 417 inserted into the 53 th slot 2253 at the open-side coil end 31 side by the 4 th joint 454. The 1 st leg 411 inserted into the 53 rd slot 2253 is connected to the 8 th leg 418 inserted into the 60 th slot 2260 by the bent portion 42 on the closed-side coil end 32 side. The 8 th leg 418 inserted into the 60 th insertion groove 2260 is connected to the 7 th leg 417 inserted into the 65 th insertion groove 2265 at the open side coil end 31 side by the 4 th engagement 454. The 7 th leg portion 417 inserted into the 65 th insertion groove 2265 is connected to the 8 th leg portion 418 inserted into the 72 th insertion groove 2272 by the bent portion 42 on the closed side coil end portion 32 side. The 8 th leg portion 418 inserted into the 72 th slot 2272 is located on the open-side coil end portion 31 side, and the tip portion 44 is connected to the neutral point 70 at the end of the winding V1.

By winding the winding V1 around the stator core 20 in this manner, the winding V1 forms 12 poles in the stator 10.

As shown in fig. 7A to 7D, the winding V2 starts at the tip 44 of the 8 th leg 418 inserted into the 6 th slot 2206 on the open-side coil end 31 side, and the 8 th leg 418 inserted into the 6 th slot 2206 is connected to the 7 th leg 417 inserted into the 71 th slot 2271 on the closed-side coil end 32 side by the bent portion 42. The 7 th leg 417 inserted into the 71 th insertion groove 2271 is connected to the 8 th leg 418 inserted into the 66 th insertion groove 2266 at the open side coil end 31 side by the 4 th engagement portion 454. The 8 th leg 418 inserted into the 66 th insertion groove 2266 is connected to the 7 th leg 417 inserted into the 59 th insertion groove 2259 at the closed-side coil end 32 side by the bent portion 42. The 7 th leg portion 417 inserted into the 59 th slot 2259 is connected to the 8 th leg portion 418 inserted into the 54 th slot 2254 at the open-side coil end 31 side by the 4 th joint 454. The 8 th leg 418 inserted into the 54 th slot 2254 is connected to the 7 th leg 417 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end 32 side. The 7 th leg 417 inserted into the 47 th slot 2247 is connected to the 8 th leg 418 inserted into the 42 th slot 2242 at the open side coil end 31 side by the 4 th joint 454. The 8 th leg 418 inserted into the 42 th slot 2242 is connected to the 7 th leg 417 inserted into the 35 th slot 2235 at the closed-side coil end 32 side by the bent portion 42. The 7 th leg portion 417 inserted into the 35 th slot 2235 is connected to the 8 th leg portion 418 inserted into the 30 th slot 2230 at the open-side coil end 31 side by the 4 th joint 454. The 8 th leg portion 418 inserted into the 30 th slot 2230 is connected to the 7 th leg portion 417 inserted into the 23 rd slot 2223 at the closed-side coil end portion 32 side by the bent portion 42. The 7 th leg portion 417 inserted into the 23 rd slot 2223 is connected to the 8 th leg portion 418 inserted into the 18 th slot 2218 at the open side coil end portion 31 side by the 4 th joint 454. The 8 th leg 418 inserted into the 18 th slot 2218 is connected to the 7 th leg 417 inserted into the 11 th slot 2211 at the closed-side coil end 32 side by the bent portion 42. The 7 th leg 417 inserted into the 11 th slot 2211 is connected to the 6 th leg 416 inserted into the 6 th slot 2206 at the open side coil end 31 side by the 7 th joint 457.

The 6 th leg portion 416 inserted into the 6 th insertion groove 2206 is connected to the 5 th leg portion 415 inserted into the 71 th insertion groove 2271 by the bent portion 42 on the closed side coil end portion 32 side. The 5 th leg 415 inserted into the 71 th insertion groove 2271 is connected to the 6 th leg 416 inserted into the 66 th insertion groove 2266 by the 3 rd joint 453 on the open side coil end 31 side. The 6 th leg 416 inserted into the 66 th insertion groove 2266 is connected to the 5 th leg 415 inserted into the 59 th insertion groove 2259 at the closed side coil end 32 side by the bent portion 42. The 5 th leg portion 415 inserted into the 59 th slot 2259 is connected to the 6 th leg portion 416 inserted into the 54 th slot 2254 at the open-side coil end 31 side by the 3 rd joint 453. The 6 th leg 416 inserted into the 54 th slot 2254 is connected to the 5 th leg 415 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end 32 side. The 5 th leg 415 inserted into the 47 th slot 2247 is connected to the 6 th leg 416 inserted into the 42 th slot 2242 at the open-side coil end 31 side by the 3 rd joint 453. The 6 th leg 416 inserted into the 42 th slot 2242 is connected to the 5 th leg 415 inserted into the 35 th slot 2235 by the bent portion 42 on the closed-side coil end 32 side. The 5 th leg portion 415 inserted into the 35 th slot 2235 is connected to the 6 th leg portion 416 inserted into the 30 th slot 2230 at the open-side coil end 31 side by the 3 rd joint 453. The 6 th leg portion 416 inserted into the 30 th slot 2230 is connected to the 5 th leg portion 415 inserted into the 23 rd slot 2223 by the bent portion 42 on the closed side coil end portion 32 side. The 5 th leg portion 415 inserted into the 23 rd slot 2223 is connected to the 6 th leg portion 416 inserted into the 18 th slot 2218 at the open side coil end portion 31 side by the 3 rd joint 453. The 6 th leg 416 inserted into the 18 th insertion slot 2218 is connected to the 5 th leg 415 inserted into the 11 th insertion slot 2211 at the closed-side coil end portion 32 side by the bent portion 42. The 5 th leg portion 415 inserted into the 11 th slot 2211 is connected to the 4 th leg portion 414 inserted into the 6 th slot 2206 at the open side coil end portion 31 side by a 6 th joint 456.

The 4 th leg portion 414 inserted into the 6 th insertion groove 2206 is connected to the 3 rd leg portion 413 inserted into the 71 th insertion groove 2271 by the bent portion 42 on the closed side coil end portion 32 side. The 3 rd leg 413 inserted into the 71 th insertion groove 2271 is connected to the 4 th leg 414 inserted into the 66 th insertion groove 2266 by the 2 nd joint 452 on the open side coil end 31 side. The 4 th leg 414 inserted into the 66 th insertion groove 2266 is connected to the 3 rd leg 413 inserted into the 59 th insertion groove 2259 at the closed side coil end 32 side by the bent portion 42. The 3 rd leg 413 inserted into the 59 th insertion groove 2259 is connected to the 4 th leg 414 inserted into the 54 th insertion groove 2254 at the open-side coil end 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 54 th slot 2254 is connected to the 3 rd leg 413 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end 32 side. The 3 rd leg 413 inserted into the 47 th slot 2247 is connected to the 4 th leg 414 inserted into the 42 th slot 2242 at the open side coil end 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 42 th slot 2242 is connected to the 3 rd leg 413 inserted into the 35 th slot 2235 at the closed-side coil end 32 side by the bent portion 42. The 3 rd leg portion 413 inserted into the 35 th slot 2235 is connected to the 4 th leg portion 414 inserted into the 30 th slot 2230 at the open side coil end 31 side by the 2 nd joint 452. The 4 th leg portion 414 inserted into the 30 th slot 2230 is connected to the 3 rd leg portion 413 inserted into the 23 rd slot 2223 at the closed side coil end portion 32 side by the bent portion 42. The 3 rd leg portion 413 inserted into the 23 rd slot 2223 is connected to the 4 th leg portion 414 inserted into the 18 th slot 2218 at the open side coil end portion 31 side by the 2 nd joint 452. The 4 th leg 414 inserted into the 18 th insertion groove 2218 is connected to the 3 rd leg 413 inserted into the 11 th insertion groove 2211 at the closed side coil end 32 side by the bent portion 42. The 3 rd leg 413 inserted into the 11 th slot 2211 is connected to the 2 nd leg 412 inserted into the 6 th slot 2206 at the open side coil end 31 side by the 5 th joint 455.

The 2 nd leg portion 412 inserted into the 6 th insertion slot 2206 is connected to the 1 st leg portion 411 inserted into the 71 th insertion slot 2271 by the bent portion 42 on the closed side coil end portion 32 side. The 1 st leg portion 411 inserted into the 71 st slot 2271 is connected to the 2 nd leg portion 412 inserted into the 66 nd slot 2266 on the open side coil end 31 side by the 1 st joint 451. The 2 nd leg portion 412 inserted into the 66 nd insertion groove 2266 is connected to the 1 st leg portion 411 inserted into the 59 th insertion groove 2259 at the closed side coil end 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 59 th slot 2259 is connected to the 2 nd leg portion 412 inserted into the 54 th slot 2254 at the open-side coil end 31 side by the 1 st joint 451. The 2 nd leg portion 412 inserted into the 54 th slot 2254 is connected to the 1 st leg portion 411 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end portion 32 side. The 1 st leg 411 inserted into the 47 th slot 2247 is connected to the 2 nd leg 412 inserted into the 42 th slot 2242 at the open-side coil end 31 side by the 1 st joint 451. The 2 nd leg portion 412 inserted into the 42 th slot 2242 is connected to the 1 st leg portion 411 inserted into the 35 th slot 2235 at the closed-side coil end portion 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 35 th slot 2235 is connected to the 2 nd leg portion 412 inserted into the 30 th slot 2230 at the open-side coil end 31 side by the 1 st joint portion 451. The 2 nd leg portion 412 inserted into the 30 th slot 2230 is connected to the 1 st leg portion 411 inserted into the 23 rd slot 2223 at the closed side coil end portion 32 side by the bent portion 42. The 1 st leg portion 411 inserted into the 23 rd slot 2223 is connected to the 2 nd leg portion 412 inserted into the 18 th slot 2218 at the open side coil end portion 31 side by the 1 st joint portion 451. The 2 nd leg portion 412 inserted into the 18 th insertion slot 2218 is connected to the 1 st leg portion 411 inserted into the 11 th insertion slot 2211 at the closed side coil end portion 32 side by the bent portion 42. The 1 st leg 411 inserted into the 11 th slot 2211 is connected to the 2 nd V-phase bridge 62V on the open side coil end 31 side, and is connected to the 1 st leg 411 inserted into the 4 th slot 2204 via the 2 nd V-phase bridge 62V.

The 1 st leg 411 inserted into the 4 th slot 2204 is connected to the 2 nd leg 412 inserted into the 11 th slot 2211 at the closed-side coil end 32 side by the bent portion 42. The 2 nd leg portion 412 inserted into the 11 th slot 2211 is connected to the 1 st leg portion 411 inserted into the 16 th slot 2216 at the open side coil end portion 31 side by the 1 st joint portion 451. The 1 st leg portion 411 inserted into the 16 th slot 2216 is connected to the 2 nd leg portion 412 inserted into the 23 rd slot 2223 at the closed side coil end portion 32 side by the bent portion 42. The 2 nd leg portion 412 inserted into the 23 rd slot 2223 is connected to the 1 st leg portion 411 inserted into the 28 th slot 2228 at the open side coil end portion 31 side by the 1 st joint portion 451. The 1 st leg portion 411 inserted into the 28 th slot 2228 is connected to the 2 nd leg portion 412 inserted into the 35 th slot 2235 at the closed-side coil end 32 side by the bent portion 42. The 2 nd leg portion 412 inserted into the 35 th slot 2235 is connected to the 1 st leg portion 411 inserted into the 40 th slot 2240 at the open side coil end 31 side by the 1 st joint portion 451. The 1 st leg 411 inserted into the 40 th slot 2240 is connected to the 2 nd leg 412 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end 32 side. The 2 nd leg portion 412 inserted into the 47 th slot 2247 is connected to the 1 st leg portion 411 inserted into the 52 th slot 2252 at the open-side coil end 31 side by the 1 st joint portion 451. The 1 st leg 411 inserted into the 52 nd slot 2252 is connected to the 2 nd leg 412 inserted into the 59 th slot 2259 at the closed-side coil end 32 side by the bent portion 42. The 2 nd leg portion 412 inserted into the 59 th slot 2259 is connected to the 1 st leg portion 411 inserted into the 64 th slot 2264 on the open side coil end 31 side by the 1 st joint 451. The 1 st leg portion 411 inserted into the 64 th insertion groove 2264 is connected to the 2 nd leg portion 412 inserted into the 71 th insertion groove 2271 by the bent portion 42 on the closed side coil end portion 32 side. The 2 nd leg portion 412 inserted into the 71 nd slot 2271 is connected to the 3 rd leg portion 413 inserted into the 4 th slot 2204 at the open side coil end 31 side by the 5 th joint 455.

The 3 rd leg 413 inserted into the 4 th insertion slot 2204 is connected to the 4 th leg 414 inserted into the 11 th insertion slot 2211 at the closed side coil end 32 side by the bent portion 42. The 4 th leg 414 inserted into the 11 th insertion slot 2211 is connected to the 3 rd leg 413 inserted into the 16 th insertion slot 2216 at the open side coil end 31 side by the 2 nd joint 452. The 3 rd leg portion 413 inserted into the 16 th slot 2216 is connected to the 4 th leg portion 414 inserted into the 23 rd slot 2223 at the closed side coil end portion 32 side by the bent portion 42. The 4 th leg portion 414 inserted into the 23 rd slot 2223 is connected to the 3 rd leg portion 413 inserted into the 28 th slot 2228 at the open side coil end 31 side by the 2 nd joint 452. The 3 rd leg portion 413 inserted into the 28 th slot 2228 is connected to the 4 th leg portion 414 inserted into the 35 th slot 2235 at the closed-side coil end 32 side by the bent portion 42. The 4 th leg portion 414 inserted into the 35 th slot 2235 is connected to the 3 rd leg portion 413 inserted into the 40 th slot 2240 by the 2 nd joint 452 on the open side coil end 31 side. The 3 rd leg 413 inserted into the 40 th slot 2240 is connected to the 4 th leg 414 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end 32 side. The 4 th leg 414 inserted into the 47 th slot 2247 is connected to the 3 rd leg 413 inserted into the 52 th slot 2252 at the open-side coil end 31 side by the 2 nd joint 452. The 3 rd leg 413 inserted into the 52 th slot 2252 is connected to the 4 th leg 414 inserted into the 59 th slot 2259 at the closed-side coil end 32 side by the bent portion 42. The 4 th leg portion 414 inserted into the 59 th insertion groove 2259 is connected to the 3 rd leg portion 413 inserted into the 64 th insertion groove 2264 by the 2 nd joint 452 on the open side coil end 31 side. The 3 rd leg 413 inserted into the 64 th insertion groove 2264 is connected to the 4 th leg 414 inserted into the 71 th insertion groove 2271 by the bent portion 42 on the closed side coil end 32 side. The 4 th leg portion 414 inserted into the 71 th insertion groove 2271 is connected to the 5 th leg portion 415 inserted into the 4 th insertion groove 2204 at the open side coil end portion 31 side by the 6 th joint 456.

The 5 th leg 415 inserted into the 4 th slot 2204 is connected to the 6 th leg 416 inserted into the 11 th slot 2211 by the bent portion 42 on the closed side coil end portion 32 side. The 6 th leg 416 inserted into the 11 th slot 2211 is connected to the 5 th leg 415 inserted into the 16 th slot 2216 at the open side coil end 31 side by the 3 rd joint 453. The 5 th leg portion 415 inserted into the 16 th slot 2216 is connected to the 6 th leg portion 416 inserted into the 23 rd slot 2223 at the closed side coil end portion 32 side by the bent portion 42. The 6 th leg portion 416 inserted into the 23 rd slot 2223 is connected to the 5 th leg portion 415 inserted into the 28 th slot 2228 at the open side coil end portion 31 side by the 3 rd joint portion 453. The 5 th leg portion 415 inserted into the 28 th slot 2228 is connected to the 6 th leg portion 416 inserted into the 35 th slot 2235 by the bent portion 42 on the closed-side coil end portion 32 side. The 6 th leg portion 416 inserted into the 35 th slot 2235 is connected to the 5 th leg portion 415 inserted into the 40 th slot 2240 at the open-side coil end 31 side by the 3 rd joint 453. The 5 th leg 415 inserted into the 40 th slot 2240 is connected to the 6 th leg 416 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end portion 32 side. The 6 th leg 416 inserted into the 47 th slot 2247 is connected to the 5 th leg 415 inserted into the 52 th slot 2252 at the open-side coil end 31 side by the 3 rd joint 453. The 5 th leg portion 415 inserted into the 52 th slot 2252 is connected to the 6 th leg portion 416 inserted into the 59 th slot 2259 at the closed-side coil end portion 32 side by the bent portion 42. The 6 th leg 416 inserted into the 59 th slot 2259 is connected to the 5 th leg 415 inserted into the 64 th slot 2264 by the 3 rd joint 453 on the open side coil end 31 side. The 5 th leg portion 415 inserted into the 64 th insertion groove 2264 is connected to the 6 th leg portion 416 inserted into the 71 th insertion groove 2271 by the bent portion 42 on the closed side coil end portion 32 side. The 6 th leg 416 inserted into the 71 th slot 2271 is connected to the 7 th leg 417 inserted into the 4 th slot 2204 at the open side coil end 31 side by the 7 th joint 457.

The 7 th leg portion 417 inserted into the 4 th slot 2204 is connected to the 8 th leg portion 418 inserted into the 11 th slot 2211 at the closed side coil end portion 32 side by the bent portion 42. The 8 th leg 418 inserted into the 11 th slot 2211 is connected to the 7 th leg 417 inserted into the 16 th slot 2216 at the open side coil end 31 side by the 4 th joint 454. The 7 th leg portion 417 inserted into the 16 th slot 2216 is connected to the 8 th leg portion 418 inserted into the 23 rd slot 2223 at the closed side coil end portion 32 side by the bent portion 42. The 8 th leg portion 418 inserted into the 23 rd slot 2223 is connected to the 7 th leg portion 417 inserted into the 28 th slot 2228 at the open side coil end portion 31 side by the 4 th joint 454. The 7 th leg portion 417 inserted into the 28 th slot 2228 is connected to the 8 th leg portion 418 inserted into the 35 th slot 2235 at the closed-side coil end portion 32 side by the bent portion 42. The 8 th leg portion 418 inserted into the 35 th slot 2235 is connected to the 7 th leg portion 417 inserted into the 40 th slot 2240 at the open-side coil end 31 side by the 4 th joint 454. The 7 th leg 417 inserted into the 40 th slot 2240 is connected to the 8 th leg 418 inserted into the 47 th slot 2247 by the bent portion 42 on the closed-side coil end portion 32 side. The 8 th leg 418 inserted into the 47 th slot 2247 is connected to the 7 th leg 417 inserted into the 52 th slot 2252 at the open-side coil end 31 side by the 4 th joint 454. The 7 th leg portion 417 inserted into the 52 th slot 2252 is connected to the 8 th leg portion 418 inserted into the 59 th slot 2259 at the closed-side coil end portion 32 side by the bent portion 42. The 8 th leg 418 inserted into the 59 th slot 2259 is connected to the 7 th leg 417 inserted into the 64 th slot 2264 through the 4 th joint 454 on the open side coil end 31 side. The 7 th leg portion 417 inserted into the 64 th insertion groove 2264 is connected to the 8 th leg portion 418 inserted into the 71 th insertion groove 2271 by the bent portion 42 on the closed side coil end portion 32 side. The 8 th leg portion 418 inserted into the 71 th slot 2271 is located on the open-side coil end portion 31 side, and the tip portion 44 is connected to the neutral point 70 at the end of the winding V2.

In this way, the winding V2 is wound around the stator core 20, and the winding V2 forms 12 poles in the stator 10. The winding V2 is formed so as to be wound in the same manner as the winding V1 at a position shifted by 1 slot clockwise in the circumferential direction from the winding V1 and so as to be wound in the same manner as the winding V1 at a position shifted by 1 slot counterclockwise in the circumferential direction from the winding V1 and so as to be wound in the same manner as the winding V1 at a position shifted by 1 slot clockwise in the circumferential direction from the 2 nd V-phase bridge 62V to the end point when viewed from the 2 nd end surface 202 side of the stator core 20.

The U-phase coil 30U is configured by connecting 2 windings U1 and U2 in parallel similarly to the V-phase coil 30V. One end of winding U1 is electrically connected to 1 st phase U lead line 51U, and one end of winding U2 is electrically connected to 2 nd phase U lead line 52U. The other end portions of the windings U1 and U2 are electrically connected to the neutral point 70.

One end of the winding U1 is formed by the tip 44 of the 4 th leg 414 inserted into the 1 st slot 2201 on the open-side coil end 31 side, and is electrically connected to the 1 st phase lead line 51U.

The winding U1 is formed so as to start from the tip 44 of the 4 th leg 414 inserted into the 1 st slot 2201 on the open-side coil end 31 side and so as to be wound in the same manner as the winding V1 at a position shifted by 4 slots counterclockwise in the circumferential direction from the winding V1 when viewed from the 2 nd end surface 202 side of the stator core 20. The winding U1 has 12 poles formed in the stator 10, and the tip 44 of the 8 th leg 418 inserted into the 68 th slot 2268 on the side of the open-side coil end 31 is connected to the neutral point 70 at the end of the winding U1.

One end of the winding U2 is formed by the tip 44 of the 8 th leg 418 inserted into the 2 nd slot 2202 on the open-side coil end 31 side, and is electrically connected to the 2 nd phase lead line 52U.

The winding U2 is formed so as to start from the tip 44 of the 8 th leg 418 inserted into the 2 nd slot 2202 on the open-side coil end 31 side and so as to be wound in the same manner as the winding V2 at a position shifted by 4 slots counterclockwise in the circumferential direction from the winding V2 when viewed from the 2 nd end face 202 side of the stator core 20. The winding U2 has 12 poles formed in the stator 10, and the tip 44 of the 8 th leg 418 inserted into the 67 th insertion groove 2267 on the open-side coil end 31 side is connected to the neutral point 70 at the end of the winding U2.

W-phase coil 30W is configured by connecting 2 windings W1 and W2 in parallel, similarly to U-phase coil 30U and V-phase coil 30V. One end of winding W1 is electrically connected to 1W-th phase lead line 51W, and one end of winding W2 is electrically connected to 2W-th phase lead line 52W. The other end portions of the windings W1 and W2 are electrically connected to the neutral point 70.

One end of the winding W1 is formed by the tip 44 of the 8 th leg 418 inserted into the 9 th slot 2209 on the open-side coil end 31 side, and is electrically connected to the 1W-th phase lead line 51W.

The winding W1 is formed so as to start at the tip 44 of the 8 th leg 418 inserted into the 9 th slot 2209 on the open-side coil end 31 side and so as to be wound in the same manner as the winding V1 at a position shifted by 4 slots clockwise in the circumferential direction from the winding V1 when viewed from the 2 nd end surface 202 side of the stator core 20. The winding W1 has 12 poles formed in the stator 10, and the tip 44 of the 8 th leg 418 inserted into the 4 th slot 2204 on the side of the open-side coil end 31 is connected to the neutral point 70 at the end of the winding W1.

One end of the winding W2 is formed by the tip 44 of the 8 th leg 418 inserted into the 10 th slot 2210 on the open-side coil end 31 side, and is electrically connected to the 2W-th phase lead line 52W.

The winding W2 is formed so as to start at the tip 44 of the 8 th leg 418 inserted into the 10 th slot 2210 on the open-side coil end 31 side and so as to be wound in the same manner as the winding V2 at a position shifted by 4 slots clockwise in the circumferential direction from the winding V2 as viewed from the 2 nd end surface 202 side of the stator core 20. The winding W2 has 12 poles formed in the stator 10, and the tip 44 of the 8 th leg 418 inserted into the 3 rd slot 2203 on the side of the open-side coil end 31 is connected to the neutral point 70 at the end of the winding W2.

In this way, the windings U1, U2, V1, V2, W1, and W2 alternately connect the legs 41 arranged in the radially adjacent 2 layers in each slot 22 and are wound in the circumferential direction. Specifically, the windings U1, U2, V1, V2, W1, and W2 are wound in the circumferential direction while alternately connecting the 1 st leg 411 and the 2 nd leg 412, the 3 rd leg 413 and the 4 th leg 414, the 5 th leg 415 and the 6 th leg 416, and the 7 th leg 417 and the 8 th leg 418, which are arranged in 2 layers adjacent to each other in the radial direction in each slot 22.

The coil 30 includes a 1U-phase bridge 61U and a 2U-phase bridge 62U, a 1V-phase bridge 61V and a 2V-phase bridge 62V, and a 1W-phase bridge 61W and a 2W-phase bridge 62W that electrically connect 2 leading end portions 44 of the segment conductors 40 of different phases.

This improves the degree of freedom of the structure in which the windings U1, U2, V1, V2, W1, and W2 are wound around the slots 22. In the present embodiment, the coil 30 is configured such that the U-phase lead line 50U, V, the phase lead line 50V, W, the phase lead line 50W, and the neutral point 70 are connected to the tip end 44 of the leg 41 (in the present embodiment, the 8 th leg 418 disposed at the 8 th layer) disposed at the outermost layer in the radial direction of the slot 22.

Thus, in the present embodiment, U-phase lead line 50U, V phase lead line 50V, W phase lead line 50W and neutral point 70 can be arranged radially outward of open-side coil end 31. Accordingly, since U-phase lead line 50U, V, phase lead line 50V, W, phase lead line 50W, and neutral point 70 can be formed in a simple shape, manufacturing costs of U-phase lead line 50U, V, phase lead line 50V, W, and neutral point 70 can be reduced. Further, the total length of U-phase lead line 50U, V phase lead line 50V, W phase lead line 50W and neutral point 70 can be shortened, and therefore, vibration resistance can be improved. Moreover, the manufacturing process when U-phase lead line 50U, V and phase lead line 50V, W and neutral point 70 are disposed on stator 10 is facilitated.

In the present embodiment, the 1U-phase bridge 61U and the 2U-phase bridge 62U, the 1V-phase bridge 61V and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W are each connected to the tip 44 of the leg 41 (in the present embodiment, the 1 st leg 411 disposed on the 1 st layer) disposed on the innermost layer in the radial direction of the slot 22.

Accordingly, the windings U1, U2, V1, V2, W1, W2 are configured such that, starting from the tip 44 of the leg 41 (in the present embodiment, the 8 th leg 418 disposed in the 8 th layer) connected to the U-phase lead line 50U, V phase lead line 50V, W phase lead line 50W and disposed in the outermost layer in the radial direction of the slot 22, the windings move from the outermost layer to the radially inner layer and are wound a plurality of times in the circumferential direction, the windings 1U-phase bridge 61U and 2U-phase bridge 62U, 1V-phase bridge 61V and 2V-phase bridge 62V, and the windings 1W-phase bridge 61W and 2W-phase bridge 62W connected to the tip 44 of the leg 41 (in the present embodiment, disposed in the 1 st layer in the radial direction of the slot 22 are folded back, move from the innermost layer to the radially outer layer and are wound a plurality of times in the circumferential direction, and the windings 41 disposed in the radial direction of the outermost layer of the slot 22 (in the present embodiment, the 8 th leg 418 disposed on the 8 th layer) is connected to the neutral point 70 as an end point.

Therefore, the windings U1, U2, V1, V2, W1, and W2 can be wound around the slots 22 with a simple configuration.

Returning to fig. 4, the 1U-phase bridge 61U and the 2U-phase bridge 62U, the 1V-phase bridge 61V and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W are disposed outside the open-side coil end 31 in the axial direction, and at positions overlapping the open-side coil end 31 when viewed in the axial direction.

Accordingly, the 1U-phase bridge 61U and the 2U-phase bridge 62U, the 1V-phase bridge 61V and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W can be connected to the tip 44 of the leg 41 (in the present embodiment, the 1 st leg 411 to the 7 th leg 417 disposed on the 1 st to 7 th layers) disposed on the outermost layer in the radial direction of the slot 22 without complicating the shape of the 1U-phase bridge 61U and the 2V-phase bridge 62V, and the 1W-phase bridge 61W and the 2W-phase bridge 62W, while suppressing an increase in size of the stator 10.

The 1 st V-phase bridge 61V and the 2 nd V-phase bridge 62V are disposed at positions that are axially distant from the 1 st end surface 201 of the stator core 20 by a longer distance than the 1 st U-phase bridge 61U and the 2 nd U-phase bridge 62U. Similarly, the 1 st V-phase bridge 61V and the 2 nd V-phase bridge 62V are disposed at positions that are axially distant from the 1 st end surface 201 of the stator core 20 by a longer distance than the 1 st W-phase bridge 61W and the 2 nd W-phase bridge 62W.

Thus, even when the windings U1, U2, V1, V2, W1, and W2 are configured such that bridges of different phases overlap when viewed from the axial direction, the bridges can be arranged without interfering with each other.

In the present embodiment, the 1U-phase bridge 61U and the 2U-phase bridge 62U, and the 1W-phase bridge 61W and the 2W-phase bridge 62W are disposed at substantially the same axial distance from the 1 st end surface 201 of the stator core 20.

The tip 44 of the 1 st leg 411 inserted into the 6 th slot 2206 and the tip 44 of the 1 st leg 411 inserted into the 1 st slot 2201, which are connected to the 1 st phase bridge 61U, protrude axially outward beyond the tip 44 of the other leg 41 and are connected to the 1 st phase bridge 61U at the protruding portions. The tip portion 44 of the 1 st leg 411 inserted into the 7 th slot 2207 and the tip portion 44 of the 1 st leg 411 inserted into the 72 th slot 2272, which are connected to the 2U-phase bridge 62U, protrude axially outward beyond the tip portions 44 of the other legs 41, and are connected to the 1U-phase bridge 61U at the protruding portions.

The tip 44 of the 1 st leg 411 inserted into the 10 th slot 2210 and the tip 44 of the 1 st leg 411 inserted into the 5 th slot 2205, which are connected to the 1 st V-phase bridge 61V, protrude axially outward beyond the tip 44 of the other leg 41 and are connected to the 1 st V-phase bridge 61V at the protruding portions. The tip portion 44 of the 1 st leg 411 inserted into the 11 th slot 2211 and the tip portion 44 of the 1 st leg 411 inserted into the 4 th slot 2204, which are connected to the 2 nd V-phase bridge 62V, protrude axially outward beyond the tip portions 44 of the other legs 41 and are connected to the 1 st V-phase bridge 61V at the protruding portions.

The tip portion 44 of the 1 st leg 411 inserted into the 14 th slot 2214 and the tip portion 44 of the 1 st leg 411 inserted into the 9 th slot 2209, which are connected to the 1 st phase bridge 61W, protrude axially outward beyond the tip portions 44 of the other legs 41 and are connected to the 1 st phase bridge 61W at the protruding portions. The tip portion 44 of the 1 st leg 411 inserted into the 15 th slot 2215 and the tip portion 44 of the 1 st leg 411 inserted into the 8 th slot 2208, which are connected to the 2W-th phase bridge 62W, protrude axially outward beyond the tip portions 44 of the other legs 41 and are connected to the 1W-th phase bridge 61W at the protruding portions.

The front end 44 of the 1 st leg 411 inserted into the 10 th slot 2210 and the front end 44 of the 1 st leg 411 inserted into the 5 th slot 2205, the front end 44 of the 1 st leg 411 inserted into the 11 th slot 2211 and the front end 44 of the 1 st leg 411 inserted into the 4 th slot 2204 connected to the 2 nd V-phase bridge 62V, the front end 44 of the 1 st leg 411 inserted into the 6 th slot 2206 and the front end 44 of the 1 st leg 411 inserted into the 1 st slot 2201 connected to the 1 st U-phase bridge 61U, the front end 44 of the 1 st leg 411 inserted into the 7 th slot 2207 and the front end 44 of the 1 st leg 411 inserted into the 72 th slot 2272 connected to the 2U-phase bridge 62U, the front end 44 of the 1 st leg 411 inserted into the 14 th slot 4 and the front ends 44 of the 1 st leg 411 and the front end 2208 of the 1W-phase bridge 2218 connected to the 1W-phase bridge 61W-phase bridge 2208 connected to the first leg 411 and the front end 2208 inserted into the 14 th slot 2209 The 1-leg 411 projects axially outward beyond the tip 44, and is connected to the 1 st V-phase bridge 61V and the 2 nd V-phase bridge 62V at the projecting portions.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and modifications, improvements, and the like can be appropriately made.

For example, in the present embodiment, when viewed from the 2 nd end surface 202 side of the stator core 20, the U-shaped segment conductors 40 are each arranged at positions shifted by 1 layer in the radial direction by 7 slots in the circumferential direction at intervals of the pair of leg portions 41 by the bent portions 42, the diagonal portions 43 are diagonal in the direction of separating from each other in the circumferential direction, the tip end portions 44 are electrically connected to the tip end portions 44 of the leg portions 41 of the U-shaped segment conductors 40 separated by 5 slots in the circumferential direction and adjacent in the radial direction, however, in the U-shaped segment conductor 40, the pair of leg portions 41 may be arranged at positions shifted by 1 layer in the radial direction at intervals of 5 slots in the circumferential direction by the bent portion 42, the inclined portion 43 may be inclined in a direction separating from each other in the circumferential direction, and the tip portion 44 may be electrically connected to the tip portion 44 of the leg portion 41 of the U-shaped segment conductor 40 adjacent to each other in the radial direction by 7 slots in the circumferential direction.

For example, in the present embodiment, the stator core 20 has 72 slots 22, the coil 30 has 12 poles, and the legs 41 of the segment conductor 40 of 8 layers are inserted into each slot 22 in a row in the radial direction, but the number of slots 22 of the stator core 20, the number of poles of the coil 30, and the number of layers of the legs 41 of the segment conductor 40 in each slot 22 may be changed as appropriate, and for example, the number of slots 22 may be set to 48, the number of poles of the coil 30 may be set to 8, and the number of layers of the legs 41 of the segment conductor 40 in each slot 22 may be set to 6.

In the present specification, at least the following matters are described. Although the corresponding components and the like in the above embodiment are shown in parentheses, the present invention is not limited to these.

(1) A stator (stator 10) of a rotating electric machine is provided with:

a substantially annular stator core (stator core 20) having a plurality of teeth (teeth 21) protruding radially inward at predetermined intervals along a circumferential direction and a plurality of slots (slots 22) serving as spaces between the teeth adjacent to each other in the circumferential direction; and

a coil (coil 30) constituted by windings (windings U1, U2, V1, V2, W1, W2) of a plurality of phases formed by a plurality of segment conductors (segment conductors 40) inserted into a plurality of the slots,

each of the segment conductors has a substantially U-shape, and includes:

a pair of legs (legs 41) extending parallel to each other and having a 1 st end (a 1 st end 41a) and a 2 nd end (a 2 nd end 41b), the pair of legs (legs 41) being disposed inside the slot and extending substantially linearly in an axial direction; and

a bent portion (bent portion 42) connecting the 2 nd end portions of the pair of leg portions to each other,

the 1 st end portions of the pair of leg portions protrude outward from a 1 st end surface (1 st end surface 201) in the axial direction of the stator core, and are formed with a diagonal portion (diagonal portion 43) extending diagonally in the 1 st direction (clockwise direction) or the 2 nd direction (counterclockwise direction) in the circumferential direction and a tip end portion (tip end portion 44) extending outward in the axial direction from a tip end of the diagonal portion,

the bent portion protrudes outward from the 2 nd end surface (2 nd end surface 202) of the stator core in the axial direction,

the coil has:

an open-side coil end (open-side coil end 31) that is formed by the skew portion and the tip portion of the segment conductor and that protrudes axially outward from the 1 st end surface of the stator core; and

a closed-side coil end (closed-side coil end 32) that is formed by the bent portions of the segment conductors and protrudes axially outward from the 2 nd end surface of the stator core,

wherein the content of the first and second substances,

According to (1), since the plurality of U-shaped segment conductors constituting the coil have a single shape, the cost of manufacturing equipment can be kept low, the operating rate of the manufacturing equipment can be increased, and the manufacturing cost of the segment conductors can be reduced.

(2) The stator of a rotating electric machine according to (1), wherein,

the bent portion is bent so as to be shifted by 1 layer in the radial direction in a state where the pair of leg portions of the segment conductor are inserted into the respective slots.

According to (2), the pair of leg portions of the U-shaped segment conductor are radially offset by 1 layer, and therefore the degree of bending of the bent portion in the radial direction can be reduced. This makes it possible to easily form the bent portion, and therefore, the manufacturing cost of the segment conductor can be reduced.

(3) The stator of a rotating electric machine according to (1) or (2), wherein,

one end portion of the winding of each phase is electrically connected to lead-out wires (1U-phase lead-out wire 51U, 2U-phase lead-out wire 52U, 1V-phase lead-out wire 51V, 2V-phase lead-out wire 52V, 1W-phase lead-out wire 51W, 2W-phase lead-out wire 52W),

the other end of the winding of each phase is electrically connected to a neutral point (neutral point 70),

the coil has bridges (1U-phase bridge 61U, 2U-phase bridge 62U, 1V-phase bridge 61V, 2V-phase bridge 62V, 1W-phase bridge 61W, 2W-phase bridge 62W) for electrically connecting 2 of the front end portions of the segment conductors different in the same phase,

the lead line and the neutral point are both connected to the tip end portion of the leg portion disposed on the outermost layer in the radial direction of the slot.

According to (3), since both the lead wire and the neutral point are connected to the tip end portion of the leg portion disposed on the outermost layer in the radial direction of the slot, the lead wire and the neutral point can be disposed on the radial outer side of the open-side coil end portion. Thus, the lead wire and the neutral point can be formed in a simple shape, and therefore, the manufacturing cost of the lead wire and the neutral point can be reduced. Further, the total length of the lead wire and the neutral point can be shortened, and thus the vibration resistance can be improved. In addition, the manufacturing process when the lead wires and the neutral point are disposed on the stator is facilitated.

(4) The stator of a rotating electric machine according to (3), wherein,

the bridge is connected to the tip end of the leg portion disposed on the innermost layer in the radial direction of the slot.

According to (4), since the bridge is connected to the tip end portion of the leg portion disposed on the innermost layer in the radial direction of the slot, the structure in which the winding is wound around each slot can be made simple.

Claims

1. A stator of a rotating electric machine is provided with:

each of the segment conductors has a substantially U-shape, and includes:

a pair of legs extending parallel to each other and having a 1 st end and a 2 nd end, the pair of legs being disposed inside the slot and extending substantially linearly in an axial direction; and

the coil has:

wherein the content of the first and second substances,

2. The stator of the rotating electric machine according to claim 1,

3. The stator of the rotating electric machine according to claim 1 or 2,

one end portion of the winding of each phase is electrically connected to an outgoing line,

the other end of the winding of each phase is electrically connected to a neutral point,

the coil has a bridge electrically connecting 2 of the front end portions of the segment conductors different in the same phase,

4. The stator of the rotating electric machine according to claim 3,