WO2021186649A1

WO2021186649A1 - Stator for rotating electrical machine, and rotating electrical machine

Info

Publication number: WO2021186649A1
Application number: PCT/JP2020/012139
Authority: WO
Inventors: 秀範内田; 久田　秀樹
Original assignee: 株式会社東芝; 東芝インフラシステムズ株式会社
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2021-09-23

Abstract

In the outermost region (lane 1) of a plurality of slots 12, a bridging portion 22R of a second coil segment 22 includes a second bridging portion 22Rb that is located on the outside of a first linear portion 22Pa and a second linear portion 22Qa in the radial direction of a stator core 10, and a first bridging portion 22Ra and the second bridging portion 22Rb are located parallel to one end surface 10a of the stator core 10. In the innermost lane 8, a bridging portion 23R of a third coil segment 23 includes a first bridging portion 23Ra located on the inside of a first linear portion 23Pa and a second linear portion 23Qa in the radial direction, and the first bridging portion 23Ra and a second bridging portion 23Rb are located parallel to the one end surface 10a. In lanes 2 to 7, a bridging portion 25R of a fifth coil segment 25 is inclined from the one end surface 10a. The bridging portion 25R of the fifth coil segment 25 is separated from the one end surface 10a toward the outside in the axial direction more than the bridging portion 22R of the second coil segment 22 and the bridging portion 23R of the third coil segment 23.

Description

Rotating machine stator and rotating machine

An embodiment of the present invention relates to a stator of a rotary electric machine and a rotary electric machine.

The rotary electric machine has a cylindrical stator and a rotor rotatably provided in the field space of the stator. The stator has a stator core formed by laminating a large number of annular electromagnetic steel sheets, and a coil attached to the stator core. A coil formed by joining a plurality of coil segments has a coil end that projects axially from both end faces of the stator core. In recent years, the stator of a rotary electric machine has been desired to be further miniaturized.
Each of the slots formed in the stator core has a plurality of regions in which the coil segment is arranged in the radial direction of the stator core. The plurality of regions of each slot arranged in the circumferential direction of the stator core constitutes a plurality of lanes of coil segments arranged concentrically with the stator core. Here, among the plurality of coil segments arranged in the radial direction of the stator core in each slot, the outermost and innermost coil segments are arranged in the outermost region and the innermost coil segment. It is easy to interfere with other coil segments arranged in the area located between.
Therefore, the coil segments located on the outermost side and the innermost side of the slot may be provided with bent portions in the radial direction of the stator core to prevent interference with other coil segments. In such a case, the coil segments located on the outermost side and the innermost side of the slot have a larger shape than the other coil segments due to the provision of the bent portion, so that it may be difficult to reduce the size of the stator. There is.

Japanese Unexamined Patent Publication No. 2014-36560

An object of the embodiment of the present invention is to provide a stator that can be miniaturized.

The stator of the rotary electric machine of the embodiment includes an annular yoke having a central axis, a plurality of teeth extending from the inner circumference of the yoke, and a stator core having a slot formed between the adjacent teeth. A first linear portion and a second linear portion arranged in different slots, and a bridging portion located outside the stator core and connecting the first linear portion and the second linear portion. It includes a flat conductor formed by joining a plurality of coil segments having the same in series.
When the direction of the central axis is the axial direction, the direction orthogonal to the axial direction is the radial direction, and the direction around the central axis is the circumferential direction, the first linear portion or the second line in the slot A plurality of shaped portions are arranged side by side in the radial direction.
On the outermost side of the plurality of coil segments arranged in the slot in the radial direction of the stator core, the first linear portion or the second linear portion of the first coil segment, the first Either the first linear portion or the second linear portion of the second coil segment provided so as to sandwich the coil segment 1 from both sides in the circumferential direction is arranged.
The innermost of the plurality of coil segments arranged in the slot in the radial direction of the stator core is the first linear portion or the second linear portion of the third coil segment, the first. Either the first linear portion or the second linear portion of the fourth coil segment provided so as to be sandwiched between the coil segments 3 from both sides in the circumferential direction is arranged.
The portion of the stator core, which is arranged in the radial direction in the slot, except for the outermost and innermost coil segments, is the fifth coil segment of the fifth coil segment. The first linear portion and the second linear portion are arranged.
Each of the first coil segment and the crosslinked portion of the second coil segment is connected to the first linear portion and is arranged in the circumferential direction between the first linear portion and the second linear portion. The first section of the stator core facing the one end surface in the axial direction and the second linear portion connected to the second linear portion via the first bent portion bent outward in the radial direction, and more than the first section. It includes a second section arranged on the outer side in the radial direction and facing the end face, and a first bending section having the first bending portion and connecting the first section and the second section.
Each of the bridged portions of the third coil segment and the fourth coil segment is connected to the second linear portion and is arranged in the circumferential direction between the first linear portion and the second linear portion. The end face is connected to the first linear portion via a third section facing the end face and a second bent portion bent inward in the radial direction, and is arranged inside the radial direction from the third section. It includes a fourth section facing the above, and a second bending section having the second bending portion and connecting the third section and the fourth section.
The cross-linked portion of the fifth coil segment has a larger angle from the end face toward the outside in the axial direction than the cross-linked portion of the second coil segment and the cross-linked portion of the third coil segment. It includes a fifth section that is arranged in the circumferential direction while being inclined at.
The fifth section of the fifth coil segment is compared with the first section and the second section of the second coil segment, and the third section and the fourth section of the third coil segment. , The end face is separated from the end face toward the outside in the axial direction.

The rotary electric machine of the embodiment includes the stator and a rotor arranged in the field space of the stator.

FIG. 1 is a cross-sectional view showing a rotary electric machine according to the first embodiment. FIG. 2 is a side view showing a part of the stator of the rotary electric machine. FIG. 3 is a perspective view showing a part of the stator from one end surface side (non-welded side of each coil segment) of the stator core. FIG. 4 is a perspective view showing a part of the stator from the other end surface side (welded side of each coil segment) of the stator core. In FIG. 5, a part of the stator is enlarged, and the first coil segment and the second coil segment located in one lane (outermost lane) of the slot of the stator core and eight lanes (innermost lane) of the slot are shown. The perspective view which shows the 3rd coil segment and the 4th coil segment located in. FIG. 6 is a perspective view showing the first coil segment and the second coil segment. FIG. 7 is a perspective view showing the third coil segment and the fourth coil segment. FIG. 8 shows an enlarged part of the stator, a fifth coil segment located across the 2 lanes and 3 lanes of the stator core slot, and a 6th coil located across the 4 lanes and 5 lanes of the slot. The perspective view which shows the 7th coil segment which is located across 6 lanes and 7 lanes of a segment and a slot. FIG. 9 is a perspective view showing the sixth coil segment. FIG. 10 is an enlargement of a part of the stator, and the first coil segment, the second coil segment (upper part in the drawing of the first coil segment), the sixth coil segment, the third coil segment, and the fourth coil segment (upper part in the drawing). The side view which shows the 3rd coil segment (lower part in the figure). FIG. 11 is a schematic view showing a connection state of each coil segment constituting two coils connected in parallel for one phase (U phase) on one end surface side (non-welded side of each coil segment) of the stator. .. FIG. 12 is a schematic view showing a connection state of each coil segment constituting two coils connected in parallel for one phase (U phase) on the other end surface side (welded side of each coil segment) of the stator. FIG. 13 is a wiring diagram of two coils connected in parallel for one phase (U phase). FIG. 14 is a wiring diagram of the first coil of the two coils connected in parallel. FIG. 15 is a wiring diagram of the second coil of the two coils connected in parallel. FIG. 16 is a wiring diagram of two coils connected in parallel for one phase (U phase) according to a comparative example. FIG. 17 is a wiring diagram of one coil for one phase (U phase) according to the second embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The disclosure is merely an example, and the invention is not limited by the contents described in the following embodiments. Modifications that can be easily conceived by those skilled in the art are naturally included in the scope of disclosure. In order to clarify the explanation, in the drawings, the size, shape, etc. of each part may be changed with respect to the actual embodiment and represented schematically.

(First Embodiment)
The stator 110 and the rotor 120 constituting the rotary electric machine 100 will be described with reference to FIG.
FIG. 1 is a cross-sectional view of the rotary electric machine 100 according to the first embodiment.

As shown in FIG. 1, the rotary electric machine 100 is configured as, for example, a permanent magnet type. The rotary electric machine 100 has a cylindrical stator 110 and a rotor 120 provided inside the stator 110 so as to be rotatable around the central axis C1 and coaxially with the stator 110. A field space is formed inside the stator 110. The field space in the embodiment is a space in which a magnetic field is generated by the stator 110.
In the following description, the extending direction of the central axis C1 of the rotary electric machine 100 is referred to as an axial direction Z, the direction of rotation around the central axis C1 is referred to as a circumferential direction, and the axial direction Z and the direction orthogonal to the circumferential direction are referred to as a radial direction.

As shown in FIG. 1, the stator 110 has a cylindrical stator core 10 and a coil (rotor winding) 20 wound around the stator core 10.
The stator core 10 is formed by laminating a plurality of annular electromagnetic steel plates 10S made of a magnetic material, for example, silicon steel, in a concentric manner on the central axis C1. The plurality of electrical steel sheets 10S are connected to each other in a laminated state by welding a plurality of locations on the outer peripheral surface of the stator core 10. The stator core 10 has one end surface 10a located at one end in the axial direction Z and the other end surface 10b located at the other end in the axial direction Z in a state where a plurality of electromagnetic steel sheets 10S are laminated. There is. One end surface 10a and the other end surface 10b extend orthogonally to the central axis C1.

A plurality of (for example, 48) slots 12 are formed in the inner peripheral portion of the stator core 10. In each slot 12, a plurality of

regions

1T, 2T, 3T in which a plurality of types of coil segments (first coil segment 21 to seventh coil segment 27) are inserted in the axial direction Z and arranged side by side in the radial direction of the stator core 10 It has 4, 5T, 6T, 7T and 8T. Here, the plurality of regions 1T to 8T of each slot 12 form 1 to 8 lanes of the coil segment as described later in a state where the stator cores 10 are arranged in an annular shape in the circumferential direction. Each slot 12 extends from one end surface 10a to the other end surface 10b of the stator core 10 along the central axis C1, and is arranged at equal intervals in the circumferential direction of the stator core 10. Each slot 12 opens to the inner peripheral surface of the stator core 10 and extends from the inner peripheral surface in the radial direction (diameter outside) of the stator core 10. Each slot 12 extends over the entire length of the stator core 10 in the axial direction Z, one end thereof opens to one end surface 10a of the stator core 10, and the other end opens to the other end surface 10b of the stator core 10. doing.
Although each slot 12 has been shown as an example of opening on the inner peripheral surface of the stator core 10 in the present embodiment, it is also possible to configure the slot 12 so as not to open on the inner peripheral surface of the stator core 10. Further, although each slot 12 extends parallel to the axial direction Z of the stator core 10, each slot 12 extends at an angle with respect to the axial direction Z, that is, a so-called skewed configuration. You can also do it.

A plurality of (for example, 48) teeth 14 are formed between the slots 12 adjacent to each other in the circumferential direction of the stator core 10. In the stator core 10, a slot 12 is formed between adjacent teeth 14. The teeth 14 extend toward the central axis C1 shown in FIG. 1 and are arranged at equal intervals along the circumferential direction of the stator core 10. That is, the stator core 10 extends radially inward from the inner peripheral surface of the yoke 16 toward the central axis C1 and the annular yoke 16 which is located radially outside the plurality of slots 12 and has the central axis C1. It has a plurality of teeth 14 that have been put out integrally.

The coil 20 is arranged in each slot 12 and is wound around each tooth 14 located between the adjacent slots 12. The coil 20 has a first coil end 20a extending outward in the axial direction Z from one end surface 10a of the stator core 10 and extending outward in the axial direction Z from the other end surface 10b of the stator core 10. It has a second coil end 20b and the like.

As shown in FIG. 1, the rotor 120 has a cylindrical shape formed by inserting and joining a cylindrical shaft (rotating shaft) 40 that is rotated around the central axis C1 and a substantially central portion of the shaft 40 in the axial direction Z. It has a rotor core 42 and a plurality of permanent magnets 44 embedded in the rotor core 42.

The rotor core 42 is configured as a laminated body in which a plurality of magnetic materials, for example, a plurality of annular electromagnetic steel plates 42S such as silicon steel are laminated concentrically. The rotor core 42 has an inner hole 42a formed coaxially with the central axis C1. The shaft 40 is inserted and fitted into the inner hole 42a of the rotor core 42, and the shaft 40 extends coaxially from the rotor core 42 with the central axis C1. The rotor core 42 is arranged coaxially with the stator core 10 with a slight gap (air gap) inside the stator core 10. That is, the outer peripheral surface of the rotor core 42 faces the tip surface of the teeth 14 corresponding to the inner peripheral surface of the stator core 10 with a slight gap.
The rotor core 42 has a d-axis extending in the radial direction (diameter outside) of the rotor core 42, and a q-axis electrically separated from the d-axis by 90 °. In the first embodiment, the axis extending in the radial direction through the boundary between adjacent magnetic poles and the central axis C1 is defined as the q-axis, and the direction electrically perpendicular to the q-axis is defined as the d-axis. The d-axis and the q-axis are provided alternately in the circumferential direction of the rotor core 42 and in a predetermined phase. The rotor core 42 is formed with holes for a plurality of permanent magnets 44 penetrating in the axial direction Z.

The permanent magnets 44 are loaded and fixed in a plurality of holes provided in the rotor core 42. The permanent magnets 44 extend over the entire length of the rotor core 42 in the axial direction Z, and are arranged at predetermined intervals in the circumferential direction of the rotor core 42. Each permanent magnet 44 is arranged on both sides of each d-axis in the circumferential direction of the rotor core 42. Each permanent magnet 44 is formed in an elongated flat plate shape having a rectangular cross section, and has a length substantially equal to the length in the axial direction Z of the rotor core 42. The permanent magnets 44 are inclined with respect to the d-axis when visually recognized in a cross section orthogonal to the central axis C1 of the rotor core 42. The two permanent magnets 44 arranged on both sides of each d-axis are arranged side by side in a substantially V shape, for example. Here, the ends of the permanent magnets 44 on the inner peripheral side are adjacent to the d-axis and face each other with a slight gap. The outer peripheral end of the permanent magnet 44 is separated from the d-axis along the circumferential direction of the rotor core 42, and is located near the outer peripheral surface of the rotor core 42 and near the q-axis. As a result, the outer peripheral end of the permanent magnet 44 is adjacent to the outer peripheral end of the permanent magnet 44 of the adjacent magnetic poles with the q-axis in between.
In the present embodiment, each permanent magnet 44 is inclined with respect to the d-axis, but each permanent magnet 44 may not be inclined with respect to the d-axis.

Here, the rotary electric machine 100 is driven by a three-phase (U-phase, V-phase, and W-phase) AC power supply. For example, two coils 20 corresponding to the U phase and connected in parallel, two coils 20 corresponding to the V phase and connected in parallel, and two coils 20 corresponding to the W phase and connected in parallel are distributed. It is wrapped around the teeth 14 due to the arrangement of the mold. That is, a total of six coils 20 corresponding to the U phase, the V phase, and the W phase, which are connected in parallel, are wound around the teeth 14. Here, among the 48 slots 12 arranged in the circumferential direction of the stator core 10, the nth slot 12 (nth is not shown, the same applies hereinafter) and the n + 1th slot 12 with respect to any slot 12 are used. , U-phase two coils 20 are arranged. n is 1, 6, 12, 18, 24, 30, 36 and 42. Similarly, of the 48 slots 12, two V-phase coils 20 are arranged in the n + 2nd and n + 3rd slots. Similarly, of the 48 slots 12, two W-phase coils 20 are arranged in the n + 4th and n + 5th slots. A total of eight coil segments are arranged in each slot 12 so that the long sides are lined up in parallel with the radial direction of the stator core 10.

The outline of the coil 20 constituting the stator 110 will be described with reference to FIGS. 2 to 4.
FIG. 2 is a side view showing a part of the stator 110 of the rotary electric machine 100, and FIG. 3 shows a part of the stator 110 from one end surface 10a side (non-welded side of each coil segment) of the stator core 10. FIG. 4 is a perspective view showing a part of the stator 110 from the other end surface 10b side (welded side of each coil segment) of the stator core 10.
Here, FIG. 3 shows 1 lane (outermost lane) of the coil 20 (outermost lane), 2 lanes, 3 lanes, 4 lanes, 5 lanes, and 6 in each slot 12 arranged in an annular shape in the circumferential direction of the stator core 10. The lanes, 7 lanes and 8 lanes (innermost lanes) are represented by 1L, 2L, 3L, 4L, 5L, 6L, 7L and 8L. The same notation is used for drawings after FIG. 3 as necessary.

As shown in FIG. 2, the coil 20 is composed of a flat conductor having a rectangular cross section (cross section) perpendicular to the longitudinal direction. The flat conductor is formed in a rectangular shape having two long sides and two short sides facing each other in a cross section, for example. The flat conductor may be formed so that the cross section has an oval shape by bending, for example, two short sides of the cross section. The four corners of the flat conductor are rounded in the cross section. The flat conductor may be chamfered at the four corners in the cross section, or may remain at right angles without processing the four corners in the cross section. The coil 20 is made of copper or aluminum having sufficient conductivity. The coil 20 is configured by combining a plurality of coil segments (first coil segment 21 to seventh coil segment 27), which will be described later. That is, the coil 20 formed of the flat conductor is formed by joining a plurality of coil segments in series. Each coil 20 is provided with a lead wire at one end thereof, and the other end is connected to the neutral point.

As shown in FIG. 3, the first coil 20 of each phase (U phase, V phase and W phase) is a first coil segment arranged in the region 1T (corresponding to one outermost lane) of each slot 12. 21, the fifth coil segment 25 arranged across the area 2T (corresponding to 2 lanes) and the area 3T (corresponding to 3 lanes) of each slot 12, the area 4T (corresponding to 4 lanes) and the area 5T of each slot 12. The sixth coil segment 26 arranged across (corresponding to 5 lanes), the 7th coil segment 27 arranged across the area 6T (corresponding to 6 lanes) and the area 7T (corresponding to 7 lanes) of each slot 12. , And a third coil segment 23 arranged in the region 8T (corresponding to the innermost 8 lanes) of each slot 12.
The second coil 20 of each phase (U phase, V phase and W phase) is electrically connected in parallel with the first coil 20. The second coil 20 of each phase (U phase, V phase and W phase) has a second coil segment 22, a fifth coil segment 25, a sixth coil segment 26, and a seventh coil arranged in the region 1T of each slot 12. It is composed of a coil segment 27 and a fourth coil segment 24 arranged in the region 8T of each slot 12.

As shown in FIG. 4, the first coil segment 21, the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment constituting the first coil 20 of each phase (U phase, V phase, and W phase) are formed. The 27 and the third coil segment 23 are welded in that order to form the welding dots 28. Similarly, the second coil segment 22, the fifth coil segment 25, the sixth coil segment 26, the seventh coil segment 27, and the second coil 20 constituting the second coil 20 of each phase (U phase, V phase, and W phase). The four coil segments 24 are welded in that order to form welding dots 28. The welding dots 28 are formed by partially melting and cooling and curing the ends corresponding to the joint surfaces of different coil segments adjacent to each other, for example, by irradiation with laser light.
Here, the connection terminal, which is the power input terminal for the coil 20, is connected to the U-phase connection terminal connected to the lead wires of the two U-phase coils 20 and the lead wires of the two V-phase coils 20. It is composed of a V-phase connection terminal and a W-phase connection terminal connected to the lead wires of two W-phase coils 20. An alternating current is input to the two U-phase coils 20 via the U-phase connection terminal, an alternating current is input to the two V-phase coils 20 via the V-phase connection terminal, and the alternating current is input to the two V-phase coils 20 via the W-phase connection terminal. When an alternating current is input to the two W-phase coils 20, a predetermined interlinkage magnetic flux is formed in the stator 110 (teeth 14).

With reference to FIGS. 5, 6 and 10, the outermost of the plurality of types of coil segments constituting the coil 20, that is, the plurality of coil segments arranged in the slot 12 in the radial direction of the stator core 10. The configuration of the first coil segment 21 and the second coil segment 22 located in the region T1 (corresponding to one lane) will be described.
FIG. 5 is an enlargement of a part of the stator 110, and the first coil segment 21 and the second coil segment 22 located in the region 1T of the slot 12 of the stator core 10 and the third coil located in the region 8T of the slot 12 are shown. A perspective view showing the segment 23 and the fourth coil segment 24, FIG. 6 is a perspective view showing the first coil segment 21 and the second coil segment 22, and FIG. 10 is an enlarged part of the stator 110 and the first coil. The segment 21 and the second coil segment 22 (upper in the figure of the first coil segment 21), the sixth coil segment 26, the third coil segment 23, and the fourth coil segment 24 (lower in the figure of the third coil segment 23) are shown. It is a side view.

The first coil segment 21 is arranged in the area 1T of two different slots 12. The first coil segment 21 is formed from the first drawn portion 21P arranged in the slot 12 and the slot 12 in which the first drawn portion 21P is arranged in the circumferential direction of the stator core 10 (from the one end surface 10a side of the stator core 10). When viewed toward the other end surface 10b, the second stretched portion 21Q is arranged in the slots 12 separated by 5 in the clockwise direction (CW side in the clockwise direction), and the first stretched portion 21P and the first stretched portion 21P on the one end surface 10a side of the stator core 10. It integrally has a cross-linked portion 21R that bridges the two stretched portions 21Q and a first bent portion 21S provided between the cross-linked portion 21R and the second stretched portion 21Q.

The first stretched portion 21P of the first coil segment 21 has a first linear portion 21Pa, a first refracting portion 21Pb, and a first joint surface 21Pc.
The first linear portion 21Pa is arranged parallel to the central axis C1 with respect to the slot 12 so as to penetrate from the one end surface 10a side to the other end surface 10b side of the stator core 10.
The first refracting portion 21Pb extends from the end portion of the first linear portion 21Pa on the other end surface 10b side of the stator core 10. The first refracting portion 21Pb is refracted toward the CCW side in the counterclockwise direction of the stator core 10 when visually recognized from the one end surface 10a side of the stator core 10 toward the other end surface 10b. The first refracting portion 21Pb is shown in a state of being refracted by about 80 ° in the counterclockwise direction CCW side with respect to the axial direction Z of the stator core, that is, the first linear portion 21Pa parallel to the central axis C1. , For example, about 30 ° to 85 ° may be refracted with respect to the first linear portion 21Pa. The first refracting portion 21Pb is slightly curved in the circumferential direction of the stator core 10 so as to be along the region 1T of each slot 12 adjacent to the stator core 10 in the circumferential direction.
The first joint surface 21Pc is a portion located at the tip of the first refracting portion 21Pb and mechanically and electrically joined to another coil segment by welding to form a welding dot 28. The first joint surface 21Pc is located substantially parallel to the other end surface 10b of the stator core 10.

The second stretched portion 21Q of the first coil segment 21 is formed in a shape similar to that of the first stretched portion 21P. The second stretched portion 21Q has a second linear portion 21Qa having the same structure as the first stretched portion 21P, a second refracting portion 21Qb, and a second joint surface 21Qc. The second linear portion 21Qa is arranged in a slot 12 different from the first linear portion 21Pa.
When the direction of the central axis C1 is the axial direction Z of the stator core 10, the direction orthogonal to the axial direction Z is the radial direction of the stator core 10, and the direction around the central axis C1 is the circumferential direction of the stator core 10. A plurality of first linear portions 21Pa or second linear portions 21Qa are arranged side by side in the radial direction in the slot 12.

The cross-linked portion 21R of the first coil segment 21 is located on the one end surface 10a side of the stator core 10, and has a first cross-linked portion 21Ra, a second cross-linked portion 21Rb, and a connecting portion 21Rc. The cross-linked portion 21R is located outside the stator core 10 and connects the first linear portion 21Pa and the second linear portion 21Qa. The first cross-linked portion 21Ra is located from the middle of the first linear portion 21Pa of the first stretched portion 21P and the second linear portion 21Qa of the second stretched portion 21Q to the side of the first stretched portion 21P, and is the first stretched portion. It extends from the end of 21P.
The first crosslinked portion 21Ra is provided substantially parallel to one end surface 10a of the stator core 10. The first cross-linking portion 21Ra is curved in the circumferential direction of the stator core 10 so as to be along the region 1T of each slot 12 adjacent to the stator core 10 in the circumferential direction.
The second cross-linked portion 21Rb is located from the middle of the first linear portion 21Pa of the first stretched portion 21P and the second linear portion 21Qa of the second stretched portion 21Q to the side of the second stretched portion 21Q, and is the first bent portion. It extends from the end of the second stretched portion 21Q via 21S. The second cross-linked portion 21Rb is provided substantially parallel to one end surface 10a of the stator core 10. The second cross-linked portion 21Rb is curved in the circumferential direction of the stator core 10 in a state of protruding outward in the radial direction of the stator core 10 from the region 1T of each slot 12 adjacent to the stator core 10 in the circumferential direction. There is.
The connecting portion 21Rc connects the first cross-linked portion 21Ra and the second cross-linked portion 21Rb between the first linear portion 21Pa of the first stretched portion 21P and the second linear portion 21Qa of the second stretched portion 21Q. There is. The connecting portion 21Rc is curved between the end portion of the first cross-linked portion 21Ra and the end portion of the second cross-linked portion 21Rb so as to intersect the arc connecting the regions 1T of each slot 12. That is, due to the curved connecting portion 21Rc, the end portion of the first cross-linked portion 21Ra and the end portion of the second cross-linked portion 21Rb located radially outside the stator core 10 with respect to the end portion of the first cross-linked portion 21Ra. , Are concatenated.

The first crosslinked portion 21Ra is connected to the first linear portion 21Pa. The first crosslinked portion 21Ra is arranged between the first linear portion 21Pa and the second linear portion 21Qa in the circumferential direction of the stator core 10 and corresponds to a first section facing one end surface 10a.
The second crosslinked portion 21Rb is connected to the second linear portion 21Qa via the first bent portion 21S that is bent outward in the radial direction of the stator core 10. The second cross-linked portion 21Rb is arranged outside the first cross-linked portion 21Ra (first section) in the radial direction and corresponds to a second section facing the one end surface 10a.
The connecting portion 21Rc corresponds to a first bending section connecting the first bridging portion 21Ra (first section) and the second bridging portion 21Rb (second section).

The first bent portion 21S of the first coil segment 21 is the end portion of the second linear portion 21Qa arranged in the region 1T of each slot 12 and the radial outer side of the stator core 10 from the region 1T of each slot 12. In order to connect the end portion of the second crosslinked portion 21Rb located at, the stator core 10 is bent in the radial direction. That is, the first bent portion 21S is the end portion of the second linear portion 21Qa and the second cross-linked portion 21Rb, which are displaced relative to the radial direction and the axial direction Z of the stator core 10, respectively. It connects with the end.

In the first coil segment 21, the crosslinked portion 21R, the upper end of FIG. 6 in the first linear portion 21Pa of the first stretched portion 21P, the upper end of FIG. 6 in the second linear portion 21Qa of the second stretched portion 21Q, and the first. The bent portion 21S constitutes the first coil end 20a on one end surface 10a of the stator core 10. Similarly, in the first coil segment 21, the lower end of FIG. 6 in the first linear portion 21Pa of the first stretched portion 21P, the first refracting portion 21Pb, the first joint surface 21Pc, and the second line of the second stretched portion 21Q. The lower end of FIG. 6 in the shaped portion 21Qa, the second refracting portion 21Qb, and the second joint surface 21Qc form the second coil end 20b at the other end surface 10b of the stator core 10.

The second coil segment 22 is arranged in the region 1T of two different slots 12. The second coil segment 22 has a shape similar to that of the first coil segment 21 and is formed larger than the first coil segment 21. The second coil segment 22 is arranged so as to cover the first coil segment 21 on the one end surface 10a side of the stator core 10. That is, the first linear portion 22Pa and the second linear portion 22Qa of the second coil segment 22 form the first linear portion 21Pa and the second linear portion 21Qa of the first coil segment 21 around the stator core 10. It is arranged so as to be sandwiched from both sides in the direction. The second coil segment 22 does not straddle the first coil segment 21 when visually recognized from the one end surface 10a side of the stator core 10 toward the other end surface 10b. That is, the second coil segment 22 does not intersect the first coil segment 21 in the radial direction of the stator core 10.
The second coil segment 22 is formed from the first drawn portion 22P arranged in the slot 12 and the slot 12 in which the first drawn portion 22P is arranged in the circumferential direction of the stator core 10 (from the one end surface 10a side of the stator core 10). When viewed toward the other end surface 10b, the second stretched portion 22Q is arranged in the slot 12 seven apart in the clockwise direction (CW side), and the first stretched portion 22P and the first stretched portion 22P on the one end surface 10a side of the stator core 10. It integrally has a cross-linked portion 22R that bridges the two stretched portions 22Q and a first bent portion 22S provided between the cross-linked portion 22R and the second stretched portion 22Q.
The first stretched portion 22P has a first linear portion 22Pa, a first refracting portion 22Pb, and a first joint surface 22Pc. The first stretched portion 22P has the same configuration as the first stretched portion 21P of the first coil segment 21.
The second stretched portion 22Q is formed in a shape similar to that of the first stretched portion 22P. The second stretched portion 22Q has a second linear portion 22Qa having the same structure as the first stretched portion 22P, a second refracting portion 22Qb, and a second joint surface 22Qc.
The cross-linking portion 22R is located on the one end surface 10a side of the stator core 10, and has a first cross-linking portion 22Ra, a second cross-linking portion 22Rb, and a connecting portion 22Rc. The cross-linked portion 22R has the same configuration as the cross-linked portion 21R of the first coil segment 21, but the shapes of the first cross-linked portion 22Ra and the second cross-linked portion 22Rb are relatively long.
The first bent portion 22S has the same configuration and shape as the first bent portion 21S of the first coil segment 21.

The first crosslinked portion 22Ra is connected to the first linear portion 22Pa. The first crosslinked portion 22Ra is arranged in the circumferential direction of the stator core 10 between the first linear portion 22Pa and the second linear portion 22Qa, and corresponds to a first section facing one end surface 10a.
The second crosslinked portion 22Rb is connected to the second linear portion 22Qa via the first bent portion 22S that is bent outward in the radial direction of the stator core 10. The second cross-linked portion 22Rb is arranged outside the first cross-linked portion 22Ra (first section) in the radial direction and corresponds to a second section facing the one end surface 10a.
The connecting portion 22Rc corresponds to a first bending section connecting the first bridging portion 22Ra (first section) and the second bridging portion 22Rb (second section).

With reference to FIGS. 5, 7 and 10, the innermost of the plurality of types of coil segments constituting the coil 20, that is, the plurality of coil segments arranged in the slot 12 in the radial direction of the stator core 10. The configuration of the third coil segment 23 and the fourth coil segment 24 located in the region T8 (corresponding to 8 lanes) will be described.
FIG. 7 is a perspective view showing the third coil segment 23 and the fourth coil segment 24.

The third coil segment 23 is arranged in the region 8T of two different slots 12. The third coil segment 23 has a first extending portion 23P arranged in the slot 12 and a circumferential direction of the stator core 10 from the slot 12 in which the first extending portion 23P is arranged (from the one end surface 10a side of the stator core 10). When viewed toward the other end surface 10b, the second stretched portion 23Q is arranged in the slot 12 seven apart in the clockwise direction (CW side), and the first stretched portion 23P and the first stretched portion 23P on the one end surface 10a side of the stator core 10. The bridge portion 23R that bridges the two stretched portions 23Q and the second bent portion 23S provided between the bridged portion 23R and the first stretched portion 23P are integrally provided.
The first stretched portion 23P has a first linear portion 23Pa, a first refracting portion 23Pb, and a first joint surface 23Pc. The first stretched portion 23P has the same configuration as the first stretched portion 21P of the first coil segment 21. However, the difference is that the first refracting portion 23Pb is refracted toward the clockwise CW side of the stator core 10 in the circumferential direction when visually recognized from the one end surface 10a side of the stator core 10 toward the other end surface 10b. do.
The second stretched portion 23Q is formed in a shape similar to that of the first stretched portion 23P. The second stretched portion 23Q has a second linear portion 23Qa having the same structure as the first stretched portion 23P, a second refracting portion 23Qb, and a second joint surface 23Qc.
The cross-linking portion 23R is located on the one end surface 10a side of the stator core 10, and has a first cross-linking portion 23Ra, a second cross-linking portion 23Rb, and a connecting portion 23Rc. The cross-linked portion 23R has the same configuration as the cross-linked portion 21R of the first coil segment 21, but the shapes of the first cross-linked portion 23Ra and the second cross-linked portion 23Rb are relatively short.
The second bent portion 23S has the same configuration and shape as the first bent portion 21S of the first coil segment 21.

The second crosslinked portion 23Rb is connected to the second linear portion 23Qa. The second crosslinked portion 23Rb is arranged in the circumferential direction of the stator core 10 between the first linear portion 23Pa and the second linear portion 23Qa, and corresponds to a third section facing the one end surface 10a.
The first crosslinked portion 23Ra is connected to the first linear portion 23Pa via a second bent portion 23S that is bent inward in the radial direction of the stator core 10. The first cross-linked portion 23Ra corresponds to a fourth section which is arranged inside the second cross-linked portion 23Rb (third section) in the radial direction and faces the one end surface 10a.
The connecting portion 23Rc corresponds to a fourth bending section connecting the second bridging portion 23Rb (third section) and the first bridging portion 23Ra (fourth section).

The fourth coil segment 24 is arranged in the region 8T of two different slots 12. The fourth coil segment 24 has a shape similar to that of the third coil segment 23, and is formed smaller than the third coil segment 23. The fourth coil segment 24 is arranged so as to be covered with the third coil segment 23 on the one end surface 10a side of the stator core 10. That is, the first linear portion 24Pa and the second linear portion 24Qa of the fourth coil segment 24 are formed around the stator core 10 by the first linear portion 23Pa and the second linear portion 23Qa of the third coil segment 23. It is arranged so as to be sandwiched from both sides in the direction. The fourth coil segment 24 does not straddle the third coil segment 23 when visually recognized from the one end surface 10a side of the stator core 10 toward the other end surface 10b. That is, the fourth coil segment 24 does not intersect the third coil segment 23 in the radial direction of the stator core 10.
The fourth coil segment 24 is located in the circumferential direction of the stator core 10 from the first drawn portion 24P arranged in the slot 12 and the slot 12 in which the first drawn portion 24P is arranged (from the one end surface 10a side of the stator core 10). When viewed toward the other end surface 10b, the second stretched portion 24Q is arranged in the slots 12 separated by 5 in the clockwise direction (CW side in the clockwise direction), and the first stretched portion 24P and the first stretched portion 24P on the one end surface 10a side of the stator core 10. It integrally has a cross-linked portion 24R for cross-linking the two stretched portions 24Q and a second bent portion 24S provided between the cross-linked portion 24R and the first stretched portion 24P.
The first stretched portion 24P has a first linear portion 24Pa, a first refracting portion 24Pb, and a first joint surface 24Pc. The first stretched portion 24P has the same configuration as the first stretched portion 23P of the third coil segment 23.
The second stretched portion 24Q is formed in a shape similar to that of the first stretched portion 24P. The second stretched portion 24Q has a second linear portion 24Qa having the same structure as the first stretched portion 24P, a second refracting portion 24Qb, and a second joint surface 24Qc.
The cross-linking portion 24R is located on the one end surface 10a side of the stator core 10, and has a first cross-linking portion 24Ra, a second cross-linking portion 24Rb, and a connecting portion 24Rc. The cross-linked portion 24R has the same configuration as the cross-linked portion 23R of the third coil segment 23, but the shapes of the first cross-linked portion 24Ra and the second cross-linked portion 24Rb are relatively short.
The second bent portion 24S has the same configuration and shape as the second bent portion 23S of the third coil segment 23.

The second crosslinked portion 24Rb is connected to the second linear portion 24Qa. The second crosslinked portion 24Rb is arranged in the circumferential direction of the stator core 10 between the first linear portion 24Pa and the second linear portion 24Qa, and corresponds to a third section facing the one end surface 10a.
The first crosslinked portion 24Ra is connected to the first linear portion 24Pa via a second bent portion 24S that is bent inward in the radial direction of the stator core 10. The first cross-linked portion 24Ra corresponds to a fourth section which is arranged inside the first cross-linked portion 24Ra (third section) in the radial direction and faces the one end surface 10a.
The connecting portion 24Rc corresponds to a fourth bending section connecting the second bridging portion 24Rb (third section) and the first bridging portion 24Ra (fourth section).

With reference to FIGS. 8 to 10, a plurality of types of coil segments constituting the coil 20, that is, the outermost and innermost coil segments arranged in the radial direction of the stator core 10 in the slot 12 The configurations of the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27 located in the sandwiched regions T2 to T7 (corresponding to lanes 2 to 7) will be described.
FIG. 8 is an enlargement of a part of the stator 110, and is located across the region 2T and the region 3T of the slot 12 of the stator core 10, the fifth coil segment 25, and the region 4T and the region 5T of the slot 12. FIG. 9 is a perspective view showing a seventh coil segment 27 located across the

regions

6T and 7T of the sixth coil segment 26 and the slot 12, and FIG. 9 is a perspective view showing the sixth coil segment 26.

The fifth coil segment 25 is arranged so as to straddle the region 2T and the region 3T of two different slots 12. Specifically, of the plurality of regions 2T to 7T excluding the outermost and innermost radial regions of the plurality of slots 12, two

regions

3T and 2T (for example, 3) whose positions are relatively different in the radial direction. The first linear portion 25Pa of the fifth coil segment 25 is arranged in one region 3T (consisting of lanes and two lanes), and the second linear portion 25Qa of the fifth coil segment 25 is arranged in the other region 2T. Has been done. That is, the fifth coil segment 25 is arranged so as to straddle the region 2T and the region 3T of the two different slots 12.
Similarly, the sixth coil segment 26 is located across

regions

4T and 5T of two different slots 12.
Similarly, the seventh coil segment 27 is arranged across

regions

6T and 7T of different slots.
Here, the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27 have similar shapes and are formed relatively large in that order. The fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27 are arranged in the same manner except for the lane of the slot 12 in which they are arranged. The fifth coil segments 25, the sixth coil segments 26, and the seventh coil segments 27 arranged adjacent to each other in the circumferential direction of the stator core 10 intersect with each other in the radial direction of the stator core 10.
Therefore, of the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27, the sixth coil segment 26 located in the middle will be mainly described.

The configuration of the sixth coil segment 26 will be described with reference to FIGS. 8 to 10.
The sixth coil segment 26 has a first extending portion 26P arranged in the slot 12 and a circumferential direction of the stator core 10 from the slot 12 in which the first extending portion 26P is arranged (from the one end surface 10a side of the stator core 10). When visually recognized toward the other end surface 10b, the second stretched portion 26Q is arranged in the slots 12 6 apart from each other in the clockwise direction (CW side in the clockwise direction), and the first stretched portion 26P and the first stretched portion 26P on the one end surface 10a side of the stator core 10. It integrally has a cross-linked portion 26R that bridges the two stretched portions 26Q.

The first stretched portion 26P of the sixth coil segment 26 has a first linear portion 26Pa, a first refracting portion 26Pb, and a first joint surface 26Pc. The first linear portion 26Pa is arranged parallel to the central axis C1 with respect to the slot 12 so as to penetrate from the one end surface 10a side to the other end surface 10b side of the stator core 10. The first refracting portion 26Pb extends from the end portion of the first linear portion 26Pa on the other end surface 10b side of the stator core 10. The first refracting portion 26Pb is refracted toward the CCW side in the counterclockwise direction of the stator core 10 when visually recognized from the one end surface 10a side of the stator core 10 toward the other end surface 10b. The first refracting portion 26Pb is slightly curved in the circumferential direction of the stator core 10 so that the first joint surface 26Pc located at the tip thereof is located in 5 lanes of each slot 12 adjacent to the circumferential direction of the stator core 10. doing. The first joint surface 26Pc is a portion located at the tip of the first refracting portion 26Pb and mechanically and electrically joined to another coil segment by welding to form a welding dot 28. The first joint surface 26Pc is located substantially parallel to the other end surface 10b of the stator core 10.

The second stretched portion 26Q of the sixth coil segment 26 is formed in a shape similar to that of the first stretched portion 26P. The second stretched portion 26Q has a second linear portion 26Qa having the same structure as the first stretched portion 26P, a second refracting portion 26Qb, and a second joint surface 26Qc. However, the difference is that the second refracting portion 26Qb is refracted toward the clockwise CW side of the stator core 10 in the circumferential direction when visually recognized from the one end surface 10a side of the stator core 10 toward the other end surface 10b. do. The second refracting portion 26Qb is slightly curved in the circumferential direction of the stator core 10 so that the second joint surface 26Qc located at the tip thereof is located in the four lanes of each slot 12 adjacent to the circumferential direction of the stator core 10. doing.

The cross-linked portion 26R of the sixth coil segment 26 is located on the one end surface 10a side of the stator core 10, and has a first cross-linked portion 26Ra, a second cross-linked portion 26Rb, and a connecting portion 26Rc. Unlike the cross-linked portion 21R of the first coil segment 21, the cross-linked portion 26R is inclined so that the first cross-linked portion 26Ra and the second cross-linked portion 26Rb intersect the one end surface 10a of the stator core 10. That is, the crosslinked portion 26R is formed in a triangular shape with one end surface 10a of the stator core 10. Other than that, the configuration of the cross-linked portion 26R is the same as the configuration of the cross-linked portion 21R of the first coil segment 21, for example.

The cross-linked portion 25R of the fifth coil segment 25, the cross-linked portion 26R of the sixth coil segment 26, and the cross-linked portion 27R of the seventh coil segment 27 are the cross-linked portion 22R of the second coil segment 22 and the cross-linked portion 23R of the third coil segment 23. This corresponds to a fifth section arranged in the circumferential direction while being inclined at a large angle from one end surface 10a toward the outside in the axial direction.
The fifth section of the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27 is the first section and the second section of the second coil segment 22, and the third section and the fourth section of the third coil segment 23. Compared with the section, the one end surface 10a is separated from the one end surface toward the outside in the axial direction.

The protruding length of the coil segment (first coil segment 21 to seventh coil segment 27) on the one end surface 10a side of the stator core 10 will be described with reference to FIGS. 2, 6, 7, and 9.

As shown in FIG. 6, in the second coil segment 22 located in the outermost lane (1 lane) of the slot 12, the cross-linked portion 22R is formed substantially parallel to one end surface 10a of the stator core 10, and the stator core 22 is formed. It protrudes from one end surface 10a of 10 in the axial direction Z by a first distance H1.
As shown in FIG. 9, the sixth coil segment 26 is located radially inside the outermost lane (1 lane) of the slot 12 and radially outside the innermost lane (8 lanes). Etc. are formed in a triangular shape with the respective cross-linked portions 25R, the cross-linked portion 26R, and the cross-linked portion 27R intersecting the one end surface 10a of the stator core 10 in the axial direction Z from the one end surface 10a of the stator core 10. It protrudes only the second distance H2.
As shown in FIG. 7, in the third coil segment 23 located in the innermost peripheral lane (8 lanes) of the slot 12, the cross-linked portion 23R is formed substantially parallel to one end surface 10a of the stator core 10, and the stator is formed. It protrudes from one end surface 10a of the iron core 10 in the axial direction Z by a first distance H1.
That is, as shown in FIG. 2, the first distance H1 is sufficiently shorter than the second distance H2.

The outline of the connection state of the coil 20 will be described with reference to FIGS. 6, 7 and 9.

In the first coil 20 of each phase (U phase, V phase and W phase), the first coil segment 21 in which both the pair of first refracting portions 21Pb and the second refracting portion 21Qb are refracted in the counterclockwise direction CCW (FIG. 6), the fifth coil segment 25 (not shown), the sixth coil segment 26 (FIG. 9), and the seventh coil segment 27 (not shown) refracted clockwise CW and counterclockwise CCW so that the pair of refracting portions are separated from each other. (Not shown), and in the third coil segment 23 (FIG. 7) in which both the pair of first refracting portions 23Pb and the second refracting portion 23Qb are refracted clockwise CW, each joint adjacent to the radial of the stator core 10 The surfaces are welded together to form a single coil.
The second coil 20 of each phase (U phase, V phase and W phase) has a second coil segment 22 in which both the pair of first refracting portions 22Pb and the second refracting portion 22Qb are refracted counterclockwise CCW (FIG. 6), the fifth coil segment 25 (not shown), the sixth coil segment 26 (FIG. 9), and the seventh coil segment 27 (not shown) refracted clockwise CW and counterclockwise CCW so that the pair of refracting portions are separated from each other. Not shown), and in the fourth coil segment 24 (FIG. 7) in which both the pair of first refracting portions 24Pb and the second refracting portion 24Qb are refracted clockwise CW, each joint adjacent to the radial of the stator core 10 The surfaces are welded together to form a single coil.
In the two coils 20 of each phase (U phase, V phase and W phase), the joint surface of each coil segment is, for example, powder coated (not shown) or covered with an insulating material such as varnish (not shown). (Not shown), electrical insulation is guaranteed. Further, the surface of each coil segment other than the joint surface is coated with an insulating film (not shown) such as enamel to ensure electrical insulation.

The connection state of the coil 20 will be described with reference to FIGS. 11 to 15.
FIG. 11 shows the connection state of each coil segment constituting the two coils 20 connected in parallel for one phase (U phase) on the one end surface 10a side (non-welded side of each coil segment) of the stator 110. The schematic diagram and FIG. 12 show the connection state of each coil segment constituting the two coils 20 connected in parallel for one phase (U phase) on the other end surface 10b side (welding side of each coil segment) of the stator 110. It is a schematic diagram which shows.
FIG. 13 is a wiring diagram of two coils 20 connected in parallel for one phase (U phase), and FIG. 14 is a wiring diagram of the first coil 20 of the two coils 20 connected in parallel. FIG. 15 is a wiring diagram of the second coil 20 of the two coils 20 connected in parallel.
Here, in FIGS. 11 to 15, 48 slots 12 arranged in the circumferential direction of the stator core 10 are shown by underlining the numbers 1 to 48. 13 to 15 show only the connection state of the U-phase coil 20 among the U-phase, V-phase, and W-phase coils 20. Therefore, in FIGS. 13 to 15, the slot 12 numbers are notated in succession of two, such as 5, 6 ... 11, 12 ..., And then four consecutively omitted. There is. 13 to 15 show a, b, c, d, e, f, g, h, i, j, k, m, in the vicinity of the 36th slot 12 and in the vicinity of the 41st slot 12. The alphabets of n, p, q, r, s and t are written. These alphabetical notations indicate that the parts represented by the same alphabet are continuous in each coil segment. In FIGS. 13 to 15, each coil segment of the coil 20 represents a portion visible from one end surface 10a side of the stator core 10 relatively thickly, and a portion visible from the other end surface 10b side of the stator core 10 relative to each other. It is expressed thinly. The coil segments to be joined are joined by welding on the other end surface 10b side of the stator core 10, and the joining portion (welding dot 28) is represented by a cross shape.

The two coils 20 of the U phase, the V phase, and the W phase are relatively positioned at two positions relative to each slot 12 provided in the stator core 10 in the circumferential direction by a distributed arrangement. They are staggered. That is, of the 48 slots 12 arranged from the nth to the n + 47th, for example, the U-phase coil 20 is arranged in the nth and n + 1th slots 12, and the n + 2nd and n + 3 are relatively offset by two. A V-phase coil 20 is arranged in the second slot 12, and a W-phase coil 20 is arranged in the n + 4th and n + 5th slots 12 which are relatively offset by two. n is 1, 6, 12, 18, 24, 30, 36 and 42. As described above, the two coils 20 of the U phase, the V phase, and the W phase differ only in the position of the slot 12 in which they are arranged, and the coil segments constituting the coil 20 (first coil segment 21 to seventh coil segment). 27) The connection state between them is the same. On the other hand, the two coils 20 of the U phase, the V phase and the W phase have the first coil 20 and the second coil 20 of the same phase due to the configuration of the coil segments (first coil segment 21 to seventh coil segment 27) described above. The connection state is different.

As shown in FIGS. 11 and 12, in the first embodiment, of the two coils 20 of the U phase, the V phase, and the W phase, as an example, the coil segment constituting the two coils 20 of the U phase. Only the connection state of (1st coil segment 21 to 7th coil segment 27) will be described.

The wiring diagram of the two coils 20 connected in parallel shown in FIG. 13 is divided into a wiring diagram of the first coil 20 shown in FIG. 14 and a wiring diagram of the second coil 20 shown in FIG. ing. In FIG. 14, the first coil segment 21 represented by the reference numerals of the first coil segments 21A, 21B, 21C, and 21D has the same shape except that the location of the slot 12 in the stator core 10 is different. .. Similar to the first coil segment 21 (21A to 21D), the second coil segment 22 (22A to 22D) to the fourth coil segment 24 (24A to 24D) differ only in the location of the slot 12 in the stator core 10. And are composed of the same shape. Here, each coil segment of the first coil 20 shown in FIG. 14 has a 1 at the end, for example, the first coil segment 21A1. On the other hand, each coil segment of the second coil 20 shown in FIG. 15 has a 2 at the end, for example, the second coil segment 22A2.

As shown in FIG. 14, in the first U-phase coil 20, the first coil segment 21A1 arranged in the slots 12 of the 12th 1st lane and the 17th 1st lane, the 25th second lane, and the 29th 5th coil segment 25A1 arranged in slot 12 of 3 lanes, 6th coil segment 26A1 arranged in slot 12 of 35th 4th lane and 41st 5th lane, 47th 6th lane and 5th The 7th coil segment 27A1 arranged in the slot 12 of the 7th lane and the 3rd coil segment 23A1 arranged in the slot 12 of the 11th 8th lane and the 18th 8th lane are joined in their order. ..
The third coil segment 23A1 and the seventh coil segment 27B1 arranged in the slots 12 of the twelfth 7th lane and the sixth lane 6 and the slots 12 of the 48th 5th lane and the 42nd 4th lane are arranged. The 6th coil segment 26B1 and the 5th coil segment 25B1 arranged in the slots 12 of the 36th 3rd lane and the 30th 2nd lane, and the slots 12 of the 24th 1st lane and the 29th 1st lane are arranged. The first coil segments 21B1 that have been formed are joined in their order.
The first coil segment 21B1 and the fifth coil segment 25C1 arranged in the slots 12 of the 35th 2nd lane and the 41st 3rd lane, and the slots 12 of the 47th 4th lane and the 5th 5th lane are arranged. The 6th coil segment 26C1 and the 7th coil segment 27C1 arranged in the slots 12 of the 11th 6th lane and the 17th 7th lane, and the slot 12 of the 23rd 8th lane and the 30th 8th lane. The third coil segment 23B1 is joined in their order.
The third coil segment 23B1 and the seventh coil segment 27D1 arranged in the slots 12 of the 24th 7th lane and the 18th 6th lane, and the slots 12 of the 12th 5th lane and the 6th 4th lane are arranged. The 6th coil segment 26D1 and the 5th coil segment 25D1 arranged in the slots 12 of the 48th 3rd lane and the 42nd 2nd lane, and the slot 12 of the 36th 1st lane and the 41st 1st lane are arranged. The first coil segments 21C1 that have been formed are joined in their order.
The first coil segment 21C1 and the fifth coil segment 25E1 arranged in the slots 12 of the 47th 2nd lane and the 5th 3rd lane, and the slots 12 of the 11th 4th lane and the 17th 5th lane are arranged. The 6th coil segment 26E1 and the 7th coil segment 27E1 arranged in the slots 12 of the 23rd 6th lane and the 29th 7th lane, and the slot 12 of the 35th 8th lane and the 42nd 8th lane. The third coil segments 23C1 are joined in their order.
The third coil segment 23C1 and the seventh coil segment 27F1 arranged in the slots 12 of the 36th 7th lane and the 30th 6th lane, and the slots 12 of the 24th 5th lane and the 18th 4th lane are arranged. The 6th coil segment 26F1 and the 5th coil segment 25F1 arranged in the slots 12 of the 12th 3rd lane and the 6th 2nd lane, and the slots 12 of the 48th 1st lane and the 5th 1st lane. The first coil segments 21D1 that have been formed are joined in their order.
The first coil segment 21D1 and the fifth coil segment 25G1 arranged in the slots 12 of the 11th 2nd lane and the 17th 3rd lane, and the slots 12 of the 23rd 4th lane and the 29th 5th lane are arranged. The 6th coil segment 26G1 and the 7th coil segment 27G1 arranged in the slots 12 of the 35th 6th lane and the 41st 7th lane, and the slot 12 of the 47th 8th lane and the 6th 8th lane. The third coil segment 23D1 is joined in their order.
The third coil segment 23D1 and the seventh coil segment 27H1 arranged in the slots 12 of the 48th 7th lane and the 42nd 6th lane, and the slot 12 of the 36th 5th lane and the 30th 4th lane are arranged. The 6th coil segment 26H1 and the 5th coil segment 25H1 arranged in the slots 12 of the 24th 3rd lane and the 18th 2nd lane are joined in their order.
The first coil 20 of the U phase is located at one end of the U-phase, and the lead wire K1 is connected to the first coil segment 21A1 located in the slot 12 of the twelfth one lane. The neutral point K2 is connected to the fifth coil segment 25H1 arranged in the slot 12 of the two lanes.

As shown in FIG. 15, in the second coil 20 of the U phase, the second coil segment 22A2 arranged in the slot 12 of the 11th 1st lane and the 18th 1st lane, and the 24th 2nd lane and the 30th 5th coil segment 25A2 located in slot 12 of 3 lanes, 6th coil segment 26A2 located in slot 12 of 36th 4th lane and 42nd 5th lane, 48th 6th lane and 6th The 7th coil segment 27A2 arranged in the slot 12 of the 7th lane and the 4th coil segment 24A2 arranged in the slot 12 of the 12th 8th lane and the 17th 8th lane are joined in their order. ..
The fourth coil segment 24A2, the seventh coil segment 27B2 arranged in the slots 12 of the 11th 7th lane and the 5th 6th lane, and the slot 12 of the 47th 5th lane and the 41st 4th lane are arranged. 6th coil segment 26B2, 5th coil segment 25B2 arranged in slot 12 of 35th 3rd lane and 29th 2nd lane, and slot 12 of 23rd 1st lane and 30th 1st lane. The second coil segments 22B2 are joined in their order.
The second coil segment 22B2 and the fifth coil segment 25C2 arranged in the slots 12 of the 36th 2nd lane and the 42nd 3rd lane, and the slots 12 of the 48th 4th lane and the 6th 5th lane are arranged. 6th coil segment 26C2, 7th coil segment 27C2 located in slot 12 of 12th 6th lane and 18th 7th lane, and slot 12 of 24th 8th lane and 29th 8th lane. The fourth coil segment 24B2 is joined in their order.
The fourth coil segment 24B2 and the seventh coil segment 27D2 arranged in the slots 12 of the 23rd 7th lane and the 17th 6th lane, and the slots 12 of the 11th 5th lane and the 5th 4th lane are arranged. 6th coil segment 26D2, 5th coil segment 25D2 arranged in slot 12 of 47th 3rd lane and 41st 2nd lane, and slot 12 of 35th 1st lane and 42nd 1st lane. The second coil segments 22C2 are joined in their order.
The second coil segment 22C2 and the fifth coil segment 25E2 arranged in the slots 12 of the 48th 2nd lane and the 6th 3rd lane, and the slots 12 of the 12th 4th lane and the 18th 5th lane are arranged. 6th coil segment 26E2, 7th coil segment 27E2 arranged in slot 12 of 24th 6th lane and 30th 7th lane, and slot 12 of 36th 8th lane and 41st 8th lane. The fourth coil segment 24C2 is joined in their order.
The fourth coil segment 24C2 and the seventh coil segment 27F2 arranged in the slots 12 of the 35th 7th lane and the 29th 6th lane, and the slots 12 of the 23rd 5th lane and the 17th 4th lane are arranged. 6th coil segment 26F2, 5th coil segment 25F2 arranged in slot 12 of 11th 3rd lane and 5th 2nd lane, and slot 12 of 47th 1st lane and 6th 1st lane. The second coil segments 22D2 are joined in their order.
The second coil segment 22D2, the fifth coil segment 25G2 arranged in the slots 12 of the 12th 2nd lane and the 18th 3rd lane, and the slot 12 of the 24th 4th lane and the 30th 5th lane are arranged. 6th coil segment 26G2, 7th coil segment 27G2 located in slot 12 of 36th 6th lane and 42nd 7th lane, and slot 12 of 48th 8th lane and 5th 8th lane. The fourth coil segment 24D2 is joined in their order.
The fourth coil segment 24D2 and the seventh coil segment 27H2 arranged in the slots 12 of the 47th 7th lane and the 41st 6th lane, and the slots 12 of the 35th 5th lane and the 29th 4th lane are arranged. The 6th coil segment 26H2 and the 5th coil segment 25H2 arranged in the slots 12 of the 23rd 3rd lane and the 17th 2nd lane are joined in their order.
The second coil 20 of the U phase is located at one end of the U-phase, and the lead wire K3 is connected to the second coil segment 22A2 located in the slot 12 of the eleventh one lane. The neutral point K4 is connected to the fifth coil segment 25H2 arranged in the second lane.

The connection state of the coil 520 according to the comparative example will be described with reference to FIG.
FIG. 16 is a wiring diagram of two coils 520 connected in parallel for one phase (U phase) according to the comparative example.

In the coil 520 according to the comparative example, unlike the coil 20 of the first embodiment, the first coil segment 521 and the second coil segment 522 arranged in the region 1T of the slot 12 intersect in the radial direction of the stator core 10. ing. The first coil segment 521 and the second coil segment 522 have a similar shape to, for example, the fifth coil segment 25, and the cross-linked portion is formed in a triangular shape. However, the first coil segment 521 and the second coil segment 522 are on the one end surface 10a side of the stator core 10 in order to avoid interference with the fifth coil segment 25 located inside the stator core 10 in the radial direction. , After being deformed radially outward so as to avoid the fifth coil segment 25, it extends in the axial direction Z.
Similarly, in the coil 520 according to the comparative example, unlike the coil 20 of the first embodiment, the third coil segment 523 and the fourth coil segment 524 arranged in the region 8T of the slot 12 are in the radial direction of the stator core 10. It intersects with. The third coil segment 523 and the fourth coil segment 524 have a similar shape to, for example, the seventh coil segment 27, and the cross-linked portion is formed in a triangular shape. The third coil segment 523 and the fourth coil segment 524 are located on the one end surface 10a side of the stator core 10 in order to avoid interference with the seventh coil segment 27 located on the radial outer side of the stator core 10. 7 After being deformed inward in the radial direction so as to avoid the coil segment 27, it extends in the axial direction Z.

According to the first embodiment configured as described above, one lane is formed in the outermost region 1T in the radial direction of the plurality of slots 12 (in a state where the slots 12 are arranged in the circumferential direction of the stator core 10). In the configuration), the crosslinked portion 21R of the first coil segment 21 has a diameter larger than that of the first linear portion 21Pa and the second linear portion 21Qa via the first bent portion 21S bent outward in the radial direction of the stator core 10. The second cross-linked portion 21Rb located outside in the direction is included, and the first cross-linked portion 21Ra and the second cross-linked portion 21Rb are located substantially parallel to one end surface 10a of the stator core 10. The second crosslinked portion 21Rb of the first coil segment 21 is located outside the stator core 10 in the radial direction with respect to the first linear portion 21Pa and the second linear portion 21Qa. Since the first cross-linking portion 21Ra is located along one lane and the second cross-linking portion 21Rb is located along a virtual lane (9 lanes (not shown)) outside the one lane, the first coil segment 21 Can be arranged side by side in the circumferential direction of the stator core 10. That is, in the cross-linked portion 21R of the first coil segment 21, the first cross-linked portion 21Ra and the second cross-linked portion 21Rb connected in the circumferential direction of the stator core 10 are displaced from each other in the radial direction of the stator core 10. The first coil segments 21 adjacent to each other in the circumferential direction of the stator core 10 do not interfere with each other even if they are not configured to have a triangular shape so as to straddle each other.
Similarly, in the region 1T (constituting one lane) located on the outermost side in the radial direction of the plurality of slots 12, the crosslinked portion 22R of the second coil segment 22 is the first bent outward in the radial direction of the stator core 10. The first cross-linked portion 22Pa and the second cross-linked portion 22Rb including the second cross-linked portion 22Rb located outside the stator core 10 in the radial direction with respect to the first linear portion 22Pa and the second linear portion 22Qa via the bent portion 22S are included. The portion 22Rb is located substantially parallel to one end surface 10a of the stator core 10. The second crosslinked portion 22Rb of the second coil segment 22 is located outside the stator core 10 in the radial direction with respect to the first linear portion 22Pa and the second linear portion 22Qa. Since the first bridge portion 22Ra is located along one lane and the second bridge portion 22Rb is located along a virtual lane (9 lanes (not shown)) outside the first lane, the second coil segment 22 Can be arranged side by side in the circumferential direction of the stator core 10. That is, in the cross-linked portion 22R of the second coil segment 22, the first cross-linked portion 22Ra and the second cross-linked portion 22Rb connected in the circumferential direction of the stator core 10 are displaced in the radial direction of the stator core 10. The second coil segments 22 adjacent to each other in the circumferential direction of the stator core 10 do not interfere with each other even if they are not configured to have a triangular shape so as to straddle each other.
In the region 8T (consisting of 8 lanes) located at the innermost diameter of the plurality of slots 12, the crosslinked portion 23R of the third coil segment 23 is the second bent portion 23S bent inward in the radial direction of the stator core 10. The first cross-linked portion 23Ra and the second cross-linked portion 23Rb are included, and the first cross-linked portion 23Ra and the second cross-linked portion 23Rb are located inside the stator core 10 in the radial direction with respect to the first linear portion 23Pa and the second linear portion 23Qa. It is located substantially parallel to one end surface 10a of the stator core 10. The first crosslinked portion 23Ra of the third coil segment 23 is located inside the stator core 10 in the radial direction with respect to the first linear portion 23Pa and the second linear portion 23Qa. Since the second cross-linking portion 23Rb is located along the eight lanes and the first cross-linking portion 23Ra is located along the virtual lane (0 lane not shown) inside the eight lanes, the third coil segment 23 Can be arranged side by side in the circumferential direction of the stator core 10. That is, in the cross-linked portion 23R of the third coil segment 23, the first cross-linked portion 23Ra and the second cross-linked portion 23Rb, which are connected in the circumferential direction of the stator core 10, are located at different positions in the radial direction of the stator core 10. The third coil segments 23 adjacent to each other in the circumferential direction of the stator core 10 do not interfere with each other even if they are not configured to have a triangular shape so as to straddle each other.
Similarly, in the region 8T (consisting of 8 lanes) located at the innermost diameter of the plurality of slots 12, the crosslinked portion 24R of the fourth coil segment 24 is bent inward in the radial direction of the stator core 10. The first crosslinked portion 24Pa and the first crosslinked portion 24Ra located inside the stator core 10 in the radial direction with respect to the first linear portion 24Pa and the second linear portion 24Qa via the bent portion 24S are included, and the first crosslinked portion 24Ra and the second crosslinked portion are included. The portion 24Rb is located substantially parallel to one end surface 10a of the stator core 10. The first crosslinked portion 24Ra of the fourth coil segment 24 is located inside the stator core 10 in the radial direction with respect to the first linear portion 24Pa and the second linear portion 24Qa. Since the second cross-linking portion 24Rb is located along the eight lanes and the first cross-linking portion 24Ra is located along the virtual lane (0 lane not shown) inside the eight lanes, the fourth coil segment 24 Can be arranged side by side in the circumferential direction of the stator core 10. That is, in the cross-linked portion 24R of the fourth coil segment 24, the first cross-linked portion 24Ra and the second cross-linked portion 24Rb, which are connected in the circumferential direction of the stator core 10, are located at different positions in the radial direction of the stator core 10. The fourth coil segments 24 adjacent to each other in the circumferential direction of the stator core 10 do not interfere with each other even if they are not configured to have a triangular shape so as to straddle each other.
On the other hand, in a plurality of

regions

2T, 3T, 4T, 5T, 6T and 7T (consisting of 2 lanes to 7 lanes) excluding the outermost and innermost radial portions of the plurality of slots 12, the cross-linked portion of the fifth coil segment 25 is formed. The 25R, the cross-linked portion 26R of the 6th coil segment 26, and the cross-linked portion 27R of the 7th coil segment 27 form a triangular shape at a portion (fifth section) inclined from one end surface 10a of the stator core 10. There is. The first cross-linking portion 25Ra and the second cross-linking portion 25Rb of the fifth coil segment, the first cross-linking portion 26Ra and the second cross-linking portion 26Rb of the sixth coil segment, and the first cross-linking portion 27Ra and the second cross-linking portion of the seventh coil segment. 27Rb is inclined from one end surface 10a of the stator core 10. The cross-linking portions 25R of the fifth coil segment 25 adjacent to each other in the circumferential direction of the stator core 10, the cross-linking portions 26R of the sixth coil segment 26, and the cross-linking portions 27R of the seventh coil segment 27 are the diameters of the stator core 10. It is configured to straddle each other with respect to the direction.
According to such a configuration, as shown in FIG. 2, the stator of the second coil segment 22 located in one lane on the outermost circumference of the slot 12 and the stator of the third coil segment 23 located in eight lanes on the innermost circumference. The first distance H1 from one end surface 10a of the iron core 10 to the axial direction Z is located between the outermost circumference and the innermost circumference of the slot 12, and the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27 are located. It can be sufficiently suppressed for a two-distance H2. Therefore, the stator 110 of the rotary electric machine 100 can be miniaturized particularly in the axial direction Z. That is, the rotary electric machine 100 can be miniaturized particularly in the axial direction Z.
Further, since the first coil segment 21, the second coil segment 22, the third coil segment 23, and the fourth coil segment 24 do not need to be bent into a triangular shape, they can be easily machined and formed.

Further, according to the first embodiment, the first distance H1 in the bridged portion 22R of the second coil segment 22 and the bridged portion 23R of the third coil segment 23 is the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 23. It is shorter than the second distance H2 at the bridged

portions

25R, 26R and 27R of the coil segment 27.
According to such a configuration, the stator 110 can be sufficiently miniaturized particularly in the axial direction Z.
Further, according to the first embodiment, the first coil segment 21 and the second coil segment 22, the first coil segments 21 adjacent to each other in the circumferential direction of the stator core 10, and the first coil segments 21 adjacent to each other in the circumferential direction of the stator core 10 are adjacent to each other. The second coil segments 22 do not include a portion that intersects the stator core 10 in the radial direction and straddles the stator core 10 in the axial direction (FIGS. 3 and 5). Similarly, the third coil segment 23 and the fourth coil segment 24, the third coil segments 23 adjacent to each other in the circumferential direction of the stator core 10, and the fourth coil segments 24 adjacent to each other in the circumferential direction of the stator core 10 , Does not include a portion that intersects the radial direction of the stator core 10 and straddles the axial direction of the stator core 10 (FIGS. 3 and 5). On the other hand, the fifth coil segments 25 adjacent to each other in the circumferential direction of the stator core 10, the sixth coil segment 26 and the seventh coil segment 27 intersect in the radial direction of the stator core 10 and in the axial direction of the stator core 10. It includes a part that straddles (Figs. 3 and 8). According to such a configuration, as described above, for example, two coils 20 of each phase can be physically connected in parallel.
Further, according to the first embodiment, the first coil segment 21 and the second coil segment 22 are located inside the stator core 10 in the radial direction with respect to the outer peripheral surface 10d of the stator core 10 (FIG. 10). ). According to such a configuration, it is possible to prevent the first coil segment 21 and the second coil segment 22 from interfering with the casing 130 located outside the stator core 10.
Further, according to the first embodiment, the third coil segment 23 and the fourth coil segment 24 are located outside the stator core 10 in the radial direction with respect to the inner peripheral surface 10c of the stator core 10 (FIG. FIG. 10). According to such a configuration, it is possible to prevent the third coil segment 23 and the fourth coil segment 24 from interfering with the rotor 120 located inside the stator core 10.

Further, according to the first embodiment, the first refracting portion and the second refracting portion of each of the first coil segment 21 and the second coil segment 22 are refracted in the counterclockwise direction CCW (FIG. 6). The first refracting portion and the second refracting portion of each of the third coil segment 23 and the fourth coil segment 24 are refracted in the clockwise direction CW (FIG. 7). The first refracting portion of the fifth coil segment 25, the sixth coil segment 26, and the seventh coil segment 27 is refracted counterclockwise CCW, and the second refracting portion is refracted clockwise CW (FIG. 9). ..
According to such a configuration, as described above, for example, two coils 20 of each phase can be physically connected in parallel.
Further, according to the first embodiment, for example, the U-phase coil 20 is composed of two coils connected in parallel (FIG. 13). The first coil 20 includes a first coil segment 21, a fifth coil segment 25, a sixth coil segment 26, a seventh coil segment 27, and a third coil segment 23 (FIG. 14). .. The second coil 20 includes a second coil segment 22, a fifth coil segment 25, a sixth coil segment 26, a seventh coil segment 27, and a fourth coil segment 24 (FIG. 15). ..
According to such a configuration, as described above, for example, two coils 20 of each phase can be physically connected in parallel.

(Second Embodiment)
With reference to FIG. 17, a mode in which the coil 20 of each phase (U phase, V phase and W phase) is composed of one coil will be described.
FIG. 17 is a wiring diagram of one coil 20 for one phase (U phase) according to the second embodiment.

In the second embodiment, a configuration different from that of the first embodiment will be mainly described. In the first embodiment, the coils 20 of each phase are composed of two coils connected in parallel, but in the second embodiment, the coils 20 of each phase are composed of one coil. Further, in the first embodiment, eight coil segments are arranged in the slot 12, but in the second embodiment, six coil segments are arranged in the slot. The second embodiment has the same configuration as the first embodiment except for the above configuration.

In the second embodiment, the fifth coil segment 25, the sixth coil segment 26, and the fourth coil segment 24 are arranged in this order, starting from the second coil segment 22 connected to the U-phase lead wire K9. It is connected in a ring. Further, each coil segment is connected in an annular shape in the order of the third coil segment 23, the sixth coil segment 26, the fifth coil segment 25, and the first coil segment 21. After that, the fifth coil segment 25 located at the end point connected in an annular shape is connected to the neutral point K10 of the U phase.

According to the second embodiment configured as described above, for example, the U-phase coil 20 is composed of one coil, and the first coil segment 21 to the seventh coil segment 27 are combined as described above. ..
The configuration of the second embodiment can also be embodied in the same manner as the configuration of the first embodiment in which two coils 20 of each phase are connected in parallel.

Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.
For example, the number of coil turns and the number of coil segments installed are not limited to the above-described embodiments, and can be increased or decreased as appropriate. The rotor and the rotary electric machine according to the embodiment are applicable not only to the permanent magnet field electric machine but also to the winding field type rotary electric machine and the induction type rotary electric machine. The dimensions, materials, shapes, etc. of the rotor are not limited to the above-described embodiments, and can be variously changed according to the design.
Specifically, for example, the configuration is not limited to the configuration in which eight coil segments are provided in each slot 12 of the stator core 10 as in the embodiment, and six or less or ten or more coil segments are provided in each slot. It may be provided.

Claims

An annular yoke having a central axis, a plurality of teeth extending from the inner circumference of the yoke, and a stator core forming a slot between the adjacent teeth.
A first linear portion and a second linear portion arranged in different slots, and a bridging portion located outside the stator core and connecting the first linear portion and the second linear portion. It comprises a flat conductor composed of a plurality of coil segments joined in series.
When the direction of the central axis is the axial direction, the direction orthogonal to the axial direction is the radial direction, and the direction around the central axis is the circumferential direction, the first linear portion or the second line in the slot A plurality of shaped portions are arranged side by side in the radial direction,
On the outermost side of the plurality of coil segments arranged in the slot in the radial direction of the stator core, the first linear portion or the second linear portion of the first coil segment, the first Either the first linear portion or the second linear portion of the second coil segment provided so as to sandwich the coil segment 1 from both sides in the circumferential direction is arranged.
The innermost of the plurality of coil segments arranged in the slot in the radial direction of the stator core is the first linear portion or the second linear portion of the third coil segment, the first. Either the first linear portion or the second linear portion of the fourth coil segment provided so as to be sandwiched between the coil segments 3 from both sides in the circumferential direction is arranged.
The portion of the stator core, which is arranged in the radial direction in the slot, except for the outermost and innermost coil segments, is the fifth coil segment of the fifth coil segment. The first linear portion and the second linear portion are arranged,
Each of the cross-linked portions of the first coil segment and the second coil segment is
A first section connected to the first linear portion, arranged in the circumferential direction between the first linear portion and the second linear portion, and facing one end surface of the stator core in the axial direction. ,
A second section that is connected to the second linear portion via a first bent portion that is bent outward in the radial direction, is arranged outside the first section in the radial direction, and faces the end face.
A first bending section including the first bending portion and connecting the first section and the second section is included.
Each of the cross-linked portions of the third coil segment and the fourth coil segment is
A third section that is connected to the second linear portion, is arranged in the circumferential direction between the first linear portion and the second linear portion, and faces the end face.
A fourth section that is connected to the first linear portion via a second bent portion that is bent inward in the radial direction, is arranged inside the radial direction from the third section, and faces the end face.
A second bent section including the second bent portion and connecting the third section and the fourth section is included.
The cross-linked portion of the fifth coil segment has a larger angle from the end face toward the outside in the axial direction than the cross-linked portion of the second coil segment and the cross-linked portion of the third coil segment. Including the fifth section arranged in the circumferential direction while inclining at
The fifth section of the fifth coil segment is compared with the first section and the second section of the second coil segment, and the third section and the fourth section of the third coil segment. , A stator of a rotary electric machine, which is separated from the end face toward the outside in the axial direction.
The fixing of the rotary electric machine according to claim 1, wherein the cross-linked portion of the second coil segment and the fourth coil segment has a shorter distance to the end face than the cross-linked portion of the fifth coil segment. Child.
The first coil segment and the second coil segment, the first coil segments adjacent to each other in the circumferential direction, and the second coil segments adjacent to each other in the circumferential direction intersect each other in the radial direction. However, it does not include the part that straddles the axial direction.
The third coil segment and the fourth coil segment, the third coil segments adjacent to each other in the circumferential direction, and the fourth coil segments adjacent to each other in the circumferential direction intersect each other in the radial direction. However, it does not include the part that straddles the axial direction.
The stator of a rotary electric machine according to claim 1, wherein the fifth coil segments adjacent to each other in the circumferential direction include a portion that intersects the radial direction and straddles the axial direction.
The stator of a rotary electric machine according to claim 1, wherein the flat conductor is located inside the outer peripheral surface of the stator core in the radial direction.
The stator of a rotary electric machine according to claim 1, wherein the flat conductor is located outside the inner peripheral surface of the stator core in the radial direction.
The stator according to claim 1 and
A rotating electric machine including a rotor arranged in the field space of the stator.