WO2013179488A1

WO2013179488A1 - Rotating electric machine, stator for rotating electric machine, and vehicle

Info

Publication number: WO2013179488A1
Application number: PCT/JP2012/064305
Authority: WO
Inventors: 健治友原; 前村　明彦; 岳司井上; 憲正足立
Original assignee: 株式会社安川電機
Priority date: 2012-06-01
Filing date: 2012-06-01
Publication date: 2013-12-05
Also published as: JPWO2013179488A1; CN104364997B; JP5909789B2; CN104364997A

Abstract

This rotating electric machine (100) comprises: a rotor (2); and a stator (1) including a stator core (1a) that has a plurality of slots (11) and that is arranged so as to oppose the rotor, and a plurality of coils (1b) each mounted, in a concentric winding, to the slots of the stator core. The coils include a first coil (30), a second coil (40), and a third coil (50) that are provided so as to correspond to the respective phases of a three-phase alternating current, each coil being a band-shaped coil having a wide first surface (f) and a narrow second surface (e) that is orthogonal to the first surface. The first coil, the second coil, and the third coil are arranged so as to overlap one another along the axial direction of the stator core in a state where the respective first surfaces oppose one another at the coil ends.

Description

Rotating electric machine, stator for rotating electric machine and vehicle

The present invention relates to a rotating electrical machine, a stator for a rotating electrical machine, and a vehicle, and more particularly, to a rotating electrical machine including a coil mounted by concentric winding, a stator for a rotating electrical machine, and a vehicle.

Conventionally, a rotating electric machine including a coil mounted by concentric winding is known. Such a rotating electrical machine is disclosed in, for example, Japanese Patent Application Laid-Open No. 2010-246342.

The above Japanese Patent Application Laid-Open No. 2010-246342 discloses a rotating electric machine including a rotor disposed on the inner peripheral side of a stator and a stator including a plurality of coils. The plurality of coils of the stator are strip-shaped coils having a wide surface and a narrow surface orthogonal to the wide surface, and two types of coils, an inner coil and an outer coil, are mounted by concentric winding. The inner coil is formed such that the coil end extends outward in the axial direction of the stator and straddles the outer coil in the axial direction, and the wide surface at the coil end is arranged to extend in a direction perpendicular to the axial direction of the stator. The outer coil is formed so that the coil end is bent outward in the radial direction of the stator so as to straddle the inner coil in the radial direction, and the wide surface at the coil end is arranged to extend in the axial direction of the stator. The rotating electrical machine disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2010-246342 is considered to be configured such that the number of pole slots q per phase (number of slots / (number of phases × number of poles)) is 1. .

JP 2010-246342 A

However, in the above Japanese Patent Application Laid-Open No. 2010-246342, since the wide surface of the outer coil extends in the axial direction of the stator at the coil end, the protruding height of the coil end (dimension in the axial direction of the stator) is set. There is a problem that it tends to be large. Further, a better magnetomotive force waveform can be obtained when q = 2 than the number of pole slots per phase q = 1, and the characteristics of the rotating electrical machine are improved. A rotating electric machine may be configured below. In this case, in the above Japanese Patent Laid-Open No. 2010-246342 in which the rotating electric machine is configured by two types of coils, an inner coil and an outer coil, the coil pitch is shorter than the pole pitch. When the rotating electrical machine is configured under the conditions, it is necessary to provide three types of coils corresponding to each phase of the three-phase alternating current in order to ensure the coil pitch. In this case, since it is necessary to provide another type of coil in addition to the two types of coils, the problem that the protruding height of the coil end increases becomes significant. An increase in the protruding height of the coil end is not preferable because it increases the size of the rotating electrical machine.

The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a coil end even when three types of coils corresponding to three-phase AC phases are provided. An object of the present invention is to provide a rotating electrical machine, a stator for a rotating electrical machine, and a vehicle capable of suppressing an increase in protruding height.

A rotating electrical machine according to a first aspect includes a rotor, a stator core having a plurality of slots, the stator core being disposed so as to face the rotor, and a plurality of coils mounted concentrically on the slots of the stator core. The coil is a strip-shaped coil having a wide first surface and a narrow second surface orthogonal to the first surface, the first coil provided corresponding to each phase of the three-phase alternating current; The first coil, the second coil, and the third coil are disposed so as to overlap along the axial direction of the stator core with the first surfaces facing each other at the coil end. ing.

In the rotating electrical machine according to the first aspect, as described above, the coil is formed by a strip-shaped coil having a wide first surface and a narrow second surface orthogonal to the first surface, and the three-phase AC The first coil, the second coil, and the third coil provided corresponding to each phase are arranged so as to overlap along the axial direction of the stator core with the first surfaces facing each other at the coil end. Thereby, in the coil end, since the wide first surface of each of the first coil, the second coil, and the third coil overlaps along the axial direction, the narrow second surface (the first surface and the first surface) (Orthogonal direction) can coincide with the axial direction of the stator core. As a result, even when three types of coils corresponding to each phase of the three-phase alternating current are provided, since the second narrow surface of each coil is stacked in the axial direction (narrow direction), the coil end An increase in the protruding height in the axial direction can be suppressed.

A stator for a rotating electrical machine according to a second aspect includes a stator core having a plurality of slots, and a plurality of coils mounted concentrically on the slots of the stator core, the coils having a wide first surface, a first surface, A first coil that includes a first coil, a second coil, and a third coil that are provided corresponding to each phase of a three-phase alternating current. The second coil and the third coil are arranged so as to overlap along the axial direction of the stator core with the first surfaces facing each other at the coil end.

In the stator for a rotating electrical machine according to the second aspect, as described above, the coil is formed by a strip-shaped coil having a wide first surface and a narrow second surface orthogonal to the first surface, and is a three-phase coil. The first coil, the second coil, and the third coil provided corresponding to each AC phase are arranged so as to overlap along the axial direction of the stator core with the first surfaces facing each other at the coil end. Thereby, in the coil end, since the wide first surface of each of the first coil, the second coil, and the third coil overlaps along the axial direction, the narrow second surface (the first surface and the first surface) (Orthogonal direction) can coincide with the axial direction of the stator core. As a result, even when three types of coils corresponding to each phase of the three-phase alternating current are provided, since the second narrow surface of each coil is stacked in the axial direction (narrow direction), the coil end An increase in the protruding height in the axial direction can be suppressed.

A vehicle according to a third aspect is a vehicle including a rotating electrical machine, the rotating electrical machine having a rotor, a plurality of slots, a stator core disposed so as to face the rotor, and concentrically winding the slots of the stator core. A coil having a plurality of mounted coils, the coil being a strip-shaped coil having a wide first surface and a narrow second surface orthogonal to the first surface, each of three-phase alternating current The first coil, the second coil, and the third coil that are provided corresponding to the phases, and the first coil, the second coil, and the third coil are in a state where the first surfaces face each other at the coil end. And arranged so as to overlap along the axial direction of the stator core.

In the vehicle according to the third aspect, as described above, the coil of the rotating electrical machine is formed by a belt-like coil having a wide first surface and a narrow second surface orthogonal to the first surface, and the three-phase. The first coil, the second coil, and the third coil provided corresponding to each AC phase are arranged so as to overlap along the axial direction of the stator core with the first surfaces facing each other at the coil end. Thereby, in the coil end, since the wide first surface of each of the first coil, the second coil, and the third coil overlaps along the axial direction, the narrow second surface (the first surface and the first surface) (Orthogonal direction) can coincide with the axial direction of the stator core. As a result, even when three types of coils corresponding to each phase of the three-phase alternating current are provided, since the second narrow surface of each coil is stacked in the axial direction (narrow direction), the rotating electric machine It is possible to prevent the protruding height in the axial direction of the coil end from becoming large.

According to the rotating electric machine, the stator for the rotating electric machine, and the vehicle, even when three types of coils corresponding to the respective phases of the three-phase alternating current are provided, it is possible to suppress an increase in the protruding height of the coil end.

It is the perspective view which showed typically the whole structure of the electric motor by 1st Embodiment. It is the typical top view which looked at the electric motor shown in FIG. 1 from the axial direction. It is the perspective view which showed the U-phase coil of the electric motor by 1st Embodiment. It is the perspective view which showed the V phase coil of the electric motor by 1st Embodiment. It is the perspective view which showed the W phase coil of the electric motor by 1st Embodiment. It is the schematic diagram which showed the coil arrangement | positioning at the time of developing the stator of the electric motor shown in FIG. 1 planarly, and seeing from the radial direction outer side. It is a schematic diagram for demonstrating the structure of the coil of each phase of the electric motor shown in FIG. It is the perspective view which showed typically the whole structure of the electric motor by 2nd Embodiment. It is the perspective view which showed the U-phase coil of the electric motor by 2nd Embodiment. It is the perspective view which showed the V phase coil of the electric motor by 2nd Embodiment. It is the perspective view which showed the W phase coil of the electric motor by 2nd Embodiment. It is a schematic diagram for demonstrating the electric motor by 3rd Embodiment. It is a block diagram for demonstrating the electric motor by 3rd Embodiment. It is a figure for demonstrating the motor vehicle by 4th Embodiment.

Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
First, the configuration of the electric motor 100 according to the first embodiment will be described with reference to FIGS. 1st Embodiment demonstrates the electric motor 100 which is an example of a rotary electric machine.

As shown in FIGS. 1 and 2, the electric motor 100 includes a stator 1 that is a fixed portion and a rotor 2 that is a rotating portion (see a one-dot chain line). The rotor 2 includes a shaft 21 (see an alternate long and short dash line), a rotor core 22 (see an alternate long and short dash line), and a plurality of permanent magnets (not shown), and is rotatable around the shaft 21. The stator 1 is an example of a “rotor electric machine stator”.

The stator 1 includes a stator core 1a having a plurality of slots 11 and a plurality of coils 1b mounted in the slots. The stator core 1a is disposed so as to face the rotor 2, is formed in a cylindrical shape, and has a plurality of teeth 12 extending inward in the radial direction B on the inner peripheral side. The teeth 12 are provided at equiangular intervals along the circumferential direction C of the stator core 1 a, and a portion between the teeth 12 is a slot 11.

In the first embodiment, the electric motor 100 is a three-phase AC rotating electrical machine in which three-phase coils are concentrically wound with distributed windings and mounted in each slot 11. The electric motor 100 includes, for example, a rotating electrical machine having 8 poles and 48 slots, and the number of slots per phase per pole q = 2 (= 48 / (3 × 8)). The plurality of coils 1b are composed of three types of coils, a U-phase coil 30, a V-phase coil 40, and a W-phase coil 50, corresponding to each phase of the three-phase alternating current. As shown in FIGS. 3 to 5, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 have different shapes. The U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are examples of “first coil”, “second coil”, and “third coil”, respectively.

As an example, the concentric coil arrangement is shown in FIG. One coil 1b occupies two different slots 11 at intervals (four slots in FIG. 6), and adjacent two coils 1b of other phases are arranged in the slot 11 between one side at a time. Therefore, each coil 1b is arranged in two slots in the order of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 from the right side in FIG. In the first embodiment, the stator 1 is configured so that the number of pole slots per phase is two.

As shown in FIG. 7, each coil 1b is a flat strip-shaped edgewise coil in which flat conductor wires are wound and stacked. Specifically, the flat conducting wire has a substantially rectangular cross section having a width W1 and a thickness t1 (W1> t1) in the cross section. The flat conducting wires are stacked in a row in the thickness direction in the slot 11. Thereby, the coil 1b has the wide laminated surface f formed by laminating | stacking a rectangular conducting wire, and the narrow end surface e orthogonal to the laminated surface f. The lamination width W2 of the lamination surface f is approximately equal to the thickness t1 of the flat conductor wire × the number of laminations, and the width of the end face e (thickness of the coil 1b) is equal to the width W1 (<W2) of the flat conductor wire. As shown in FIG. 1, each coil 1b arranged in the slot 11 has a portion (coil end) that protrudes (exposes) in the axial direction from both ends in the axial direction A of the stator core 1a (slot 11). The laminated surface f is an example of a “first surface”, and the end surface e is an example of a “second surface”.

Next, the coils for each phase will be specifically described. Hereinafter, the axial direction A of the cylindrical stator core 1a is referred to as “axial direction”, the radial direction B of the stator core 1a is referred to as “radial direction”, and the circumferential direction C of the stator core 1a is referred to as “circumferential direction”. In the first embodiment, the coil ends at both ends in the axial direction of each of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are formed in substantially the same shape (symmetrical shape in the axial direction). Only the coil end on one side will be described.

As shown in FIGS. 1 and 3, the U-phase coil 30 extends from the pair of coil sides 31 extending in the axial direction and inserted into the different slots 11, and the pair of coil sides 31 at the coil end. It has a pair of 1st folding | turning part 32 and the 1st connection part 33 which connects a pair of 1st folding | turning part 32. As shown in FIG. The coil side portion 31 is an example of an “axial portion”. The first folded portion 32 is an example of an “axial portion” and a “bent portion”. The first connecting portion 33 is an example of a “connecting portion”.

The pair of first folded portions 32 have the same shape. Specifically, in the first folded portion 32, the coil side portion 31 protruding in the axial direction from the slot 11 is radially outward at the coil end, and the tip surface 32a of the first folded portion 32 is in the axial direction of the stator core 1a. It is formed by folding back toward the end face 1c (hereinafter referred to as the core end face 1c) (see FIG. 1). For this reason, the 1st folding | turning part 32 is return | folded by the substantially U shape. Moreover, the 1st folding | turning part 32 is return | folded along the lamination direction (radial direction) of a flat conducting wire. As shown in FIG. 6, the protrusion height (maximum height) from the core end surface 1c of the first folded portion 32 is H1. The first folded portion 32 is formed so that the tip surface 32a of the first folded portion 32 faces the stator core 1a at a distance D1 (D1 <H1) in the vicinity of the core end surface 1c of the stator core 1a. .

As shown in FIGS. 1 and 3, the first connecting portion 33 is formed so as to extend in the circumferential direction, and connects the end portions of the first folded portion 32 in the vicinity of the core end surface 1c. Thereby, the 1st connection part 33 is arrange | positioned in the area | region of the outer side of radial direction rather than the slot 11 of the stator core 1a, and the position of the core end surface 1c vicinity. The first connecting portion 33 is arranged such that the laminated surface f of the edgewise coil faces the core end surface 1c and is substantially parallel to the core end surface 1c. In addition, the coil end of the U-phase coil 30 is formed in a shape having a concave portion 34 that is opened in the axial direction and includes a pair of first folded portions 32 and a first connecting portion 33 when viewed from the radial direction. Yes. As shown in FIG. 6, a part of the coil ends of the other coils (the V-phase coil 40 and the W-phase coil 50) are arranged inside the concave portion 34.

As shown in FIGS. 1 and 4, the V-phase coil 40 has a pair of coil sides 41 that extend in the axial direction and are inserted into different slots 11. In addition, the V-phase coil 40 includes, at the coil end, a second folded portion 42 that continues from one coil side portion 41, a first bent portion 43 that continues from the other coil side portion 41, a second folded portion 42, and And a second connecting portion 44 for connecting the first bent portion 43. The coil side portion 41 is an example of an “axial portion”. The second folded portion 42 and the first bent portion 43 are both examples of “axial portion” and “bent portion”. The second connecting portion 44 is an example of a “connecting portion”.

The second folded portion 42 is radially outward, and the front end surface 42a (see FIG. 4) of the second folded portion 42 is folded toward the first connecting portion 33 side (core end surface 1c side) of the U-phase coil 30. The U-phase coil 30 has a substantially U-shape similar to that of the first folded portion 32. Unlike the 1st folding | turning part 32, the protrusion height of the 2nd folding | turning part 42 is H2 (> H1) (refer FIG. 6). In addition, the protrusion height H2 of the 2nd folding | turning part 42 should just be the height which can form a substantially U shape. The front end surface 42 a of the second folded portion 42 is inside the concave portion 34 formed by the pair of first folded portions 32 and the first connecting portion 33 of the U-phase coil 30 and in the vicinity of the first connecting portion 33. It is arranged at the position.

In the first bent portion 43, the coil side portion 41 protruding in the axial direction from the slot 11 is radially outward at the coil end, and the front end surface 43 a of the first bent portion 43 is the first connecting portion 33 of the U-phase coil 30. It is bent toward the opposite side (axially outer side) and is formed in a substantially S shape. Specifically, the first bent portion 43 is folded substantially at 90 degrees along the lamination direction (radial direction) of the flat wire, and then is folded at approximately 90 degrees to be substantially S-shaped. Is formed. The front end surface 43a of the first bent portion 43 faces the opposite side (axially outer side) from the core end surface 1c. The protruding height of the distal end surface 43 a of the first bent portion 43 matches the protruding height H 2 of the second folded portion 42. Further, the first bent portion 43 is disposed inside the concave portion 34 of the U-phase coil 30 (adjacent U-phase coil) different from the second folded portion 42.

The second connecting portion 44 includes a tip portion of the second folded portion 42 facing the core end surface 1c (first connecting portion 33 side) and a tip portion of the first bent portion 43 facing the opposite side of the core end surface 1c. Are connected to each other. As shown in FIG. 6, the second connecting portion 44 is a convex shape straddling the concave first portion 45 whose outer side in the axial direction is opened and the first folded portion 32 of the U-phase coil 30 when viewed from the radial direction. A stepped shape including the second portion 46 is provided. The concave first portion 45 is arranged in the vicinity of the first connecting portion 33 in the concave portion 34 of the U-phase coil 30 by being connected to the distal end portion of the second folded portion 42. The convex second portion 46 is formed so as to straddle the first folded portion 32 of the U-phase coil 30 from the outside in the axial direction by being connected to the tip portion of the first bent portion 43. As shown in FIGS. 1 and 4, in the first portion 45 and the second portion 46, the laminated surface f of the edgewise coil is opposed to the core end surface 1c except for the central step portion, and is substantially parallel to the core end surface 1c. And, it is formed to extend in an arc shape along the circumferential direction. As described above, as shown in FIG. 2, the second connecting portion 44 is disposed so as to overlap the first connecting portion 33 of the U-phase coil 30 in the axial direction (see the hatched area in FIG. 2).

As shown in FIGS. 1 and 5, the W-phase coil 50 extends in the axial direction and is continuous from the pair of coil sides 51 at the coil end, and a pair of coil sides 51 inserted into different slots 11. A pair of second bent portions 52 and a third connecting portion 53 that connects the pair of second bent portions 52 are provided. The coil side 51 is an example of an “axial portion”. The second bent portion 52 is an example of an “axial portion” and a “bent portion”. The third connecting portion 53 is an example of a “connecting portion”.

The pair of second bent portions 52 is formed by bending the coil side portion 51 protruding in the axial direction from the slot 11 radially outward at the coil end and toward the opposite side (axially outer side) from the core end surface 1c. And has a substantially S-shape similar to that of the first bent portion 43 of the V-phase coil 40. As shown in FIG. 6, the distance from the end surface 52 a (see FIG. 5) of the second bent portion 52 from the core end surface 1 c matches the protruding height H <b> 3 (> H <b> 2) of the W-phase coil 50. The pair of second bent portions 52 are respectively disposed in the concave first portions 45 of the second connecting portions 44 of the adjacent V-phase coils 40. Further, since the concave first portion 45 is disposed so as to be accommodated in the concave portion 34 of the U-phase coil 30, the pair of second bent portions 52 disposed in the concave first portion 45 is Both are disposed in the recessed portion 34 of the adjacent U-phase coil 30.

As shown in FIG. 5, the 3rd connection part 53 is formed so that the front-end | tip part of a pair of 2nd bending part 52 which faced the opposite side to the core end surface 1c may be connected. Moreover, as shown in FIG. 6, the 3rd connection part 53 straddles the axial direction outer side of the 1st folding | turning part 32 of the U-phase coil 30, the 2nd folding | turning part 42 of the V-phase coil 40, and the 1st bending part 43. , And is formed so as to straddle between the concave first portions 45 of the adjacent V-phase coils 40. The third connecting portion 53 is formed such that the laminated surface f of the edgewise coil faces the core end surface 1c, is substantially parallel to the core end surface 1c, and extends in an arc shape along the circumferential direction. As shown in FIG. 2, the third connecting portion 53 overlaps the first connecting portion 33 of the U-phase coil 30 and the second connecting portion 44 of the V-phase coil 40 in the axial direction (see the hatched area in FIG. 2). Has been placed. The maximum protrusion height of the coil end of the stator 1 according to the first embodiment is H3 (the protrusion height H3 of the W-phase coil 50).

With the above configuration, as shown in the hatched area of FIG. 2, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are connected to each other at the coil end by the connecting portions (the first connecting portion 33, the second connecting portion 44, and the first The stacked surfaces f of the three connecting portions 53) are arranged so as to overlap along the axial direction A in a state of facing each other. In addition, these connecting portions (the first connecting portion 33, the second connecting portion 44, and the third connecting portion 53) are both disposed so that the laminated surface f is substantially parallel to the core end surface 1c, and in the circumferential direction. Is formed so as to extend along. And the lamination | stacking surfaces f of these connection parts (the 1st connection part 33, the 2nd connection part 44, and the 3rd connection part 53) are arrange | positioned so that it may overlap with circumferential shape along an axial direction. As a result, in the first embodiment, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are arranged so that the narrow end faces e are stacked in the narrow direction (A direction). Yes.

Further, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are all bent portions (first portions) bent outward in the radial direction of the stator core 1a along the lamination direction (radial direction) of the rectangular conductor wire at the coil end. A folded portion 32, a second folded portion 42, a first bent portion 43, and a second bent portion 52). The connecting parts (first connecting part 33, second connecting part 44 and third connecting part 53) are bent parts (first folded part 32, second folded part 42, first bent part 43 and second bent part 52). By connecting the tip portions of each other, they are arranged in a region radially outward from the slot 11 of the stator core 1a. Strictly speaking, at the position between the adjacent U-phase coils 30, only the second connecting portion 44 and the third connecting portion 53 overlap in the axial direction, and at the position between the adjacent V-phase coils 40, Only the 1st connection part 33 and the 3rd connection part 53 have overlapped with the axial direction. Moreover, only the 1st connection part 33 and the 2nd connection part 44 have overlapped with the axial direction in the position between adjacent W-phase coils 50. FIG.

In the first embodiment, as described above, the coil 1b is formed by a band-shaped edgewise coil having a wide laminated surface f and a narrow end surface e orthogonal to the laminated surface f, and each of the three-phase alternating currents The U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 provided corresponding to the phases are arranged so as to overlap along the axial direction A with the laminated surfaces f facing each other at the coil end. Thereby, at the coil end, the laminated surfaces f of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 overlap each other along the axial direction. (Orthogonal direction) can coincide with the axial direction A. As a result, even when three types of coils corresponding to each phase of the three-phase alternating current are provided, the narrow end face e of each coil (the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50) is in the axial direction A. Since it becomes the structure piled up (in the narrow direction), it can suppress that the protrusion height of the axial direction A of a coil end becomes large.

In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are each provided with a pair of axial portions (

coil side portions

31, 41, 51, the first folded portion). 32, the second folded portion 42, the first bent portion 43 and the second bent portion 52) and a connecting portion (first connecting portion 33, second connecting portion 44, third connecting the pair of axial portions at the coil end. And the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are connected to each other on the laminated surfaces f of the connecting portions (the first connecting portion 33, the second connecting portion 44, and the third connecting portion 53). Are arranged so as to overlap along the axial direction A. Thereby, in each of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50, the connecting portions that connect the pair of axial portions (the first connecting portion 33, the second connecting portion 44, and the third connecting portion 53). Since the protrusion height at can be reduced, the protrusion height of the coil end can be reduced as a whole.

Moreover, in 1st Embodiment, as mentioned above, each connection part (the 1st connection part 33, the 2nd connection part 44, the 3rd connection part 53) of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50. ) Extending along the circumferential direction C, and the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are viewed from the axial direction A and extend along the circumferential direction (first coupling). The stacked surfaces f of the portion 33, the second connecting portion 44, and the third connecting portion 53) are arranged so as to overlap each other in a circumferential shape. Thereby, it can suppress that the protrusion height of a coil end becomes large over the wide area | region of the circumferential direction of the stator core 1a. Moreover, since each connection part (the 1st connection part 33, the 2nd connection part 44, the 3rd connection part 53) of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 overlaps circumferentially, a connection part ( Compared with the case where the 1st connection part 33, the 2nd connection part 44, and the 3rd connection part 53) shift | deviate partially to radial direction, it can suppress that the dimension of the radial direction of a coil end becomes large.

Moreover, in 1st Embodiment, as mentioned above, the coil 1b is formed with the strip | belt-shaped edgewise coil which piled up and laminated | stacked the flat conducting wire, and the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are comprised. The laminated surfaces f on which the flat conducting wires are laminated are arranged so as to overlap each other along the axial direction A. Thereby, since the strip | belt-shaped coil 1b can be obtained easily, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 arrange | positioned so that the lamination surface f may overlap in an axial direction can be provided easily. .

In the first embodiment, as described above, the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 are connected to each other in the region outside the slot 11 of the stator core 1 a in the radial direction B (the first portion The connecting portion 33, the second connecting portion 44, and the third connecting portion 53) are arranged so as to overlap each other along the axial direction A. Thereby, the U-phase coil 30 can be easily arranged by disposing the connecting portions (the first connecting portion 33, the second connecting portion 44, and the third connecting portion 53) in a region outside the slot 11 in the radial direction B. The connection parts (the 1st connection part 33, the 2nd connection part 44, the 3rd connection part 53) of V phase coil 40 and W phase coil 50 can be piled up along the direction of an axis.

In the first embodiment, as described above, the bent portions (the first folded portion 32, the second folded portion 42, the first bent portion 43, and the second bent portion 52) that are bent outward in the radial direction B are used. By providing the connecting parts (first connecting part 33, second connecting part 44, third connecting part 53) so as to connect the tip parts, the connecting parts (first connecting part 33, second connecting part 44, The three connecting portions 53) are arranged in a region outside in the radial direction from the slot 11 of the stator core 1a. As a result, the U-phase can be easily obtained simply by providing bent portions (the first folded portion 32, the second folded portion 42, the first bent portion 43, and the second bent portion 52) bent outward in the radial direction at the coil end. The connecting portions (the first connecting portion 33, the second connecting portion 44, and the third connecting portion 53) of the coil 30, the V-phase coil 40, and the W-phase coil 50 may be arranged in a region outside in the radial direction from the slot 11. it can.

In the first embodiment, as described above, the coil 1b is constituted by the strip-shaped edgewise coil obtained by winding and laminating the rectangular conductor wires, and the bent portions (the first folded portion 32, the second folded portion 42, the first folded portion, The bent portion 43 and the second bent portion 52) are bent outward in the radial direction along the laminating direction (radial direction B) of the flat wire. As a result, a rectangular conductor with a rectangular cross section is easily bent in the laminating direction or in a direction perpendicular to the laminating direction (direction along each side of the rectangular cross section) and is difficult to bend in an oblique direction (diagonal direction of the cross section). Since the first folded portion 32, the second folded portion 42, the first bent portion 43, and the second bent portion 52 can be easily bent with a small radius, the bent portion (the first folded portion 32, the second folded portion). 42, the first bent portion 43, and the second bent portion 52) can be reduced in height. In particular, as in the first embodiment, by setting the direction in which the short side of the rectangular cross section extends as the stacking direction, it becomes easier to bend into a smaller U shape in the stacking direction. The protruding heights of the two folded portions 42, the first bent portion 43, and the second bent portion 52) can be reduced.

In the first embodiment, as described above, the first connecting portion 33 of the U-phase coil 30 is positioned in the outer region in the radial direction B from the slot 11 of the stator core 1a and in the vicinity of the core end surface 1c. The second connecting portion 44 of the V-phase coil 40 and the third connecting portion 53 of the W-phase coil 50 are arranged at positions outside the first connecting portion 33 of the U-phase coil 30 in the axial direction. Thereby, since the 1st connection part 33 of the U-phase coil 30 can be arrange | positioned so that it may adjoin to the core end surface 1c, it can suppress that the protrusion height of a coil end becomes large.

Moreover, in 1st Embodiment, as mentioned above, each connection part (the 1st connection part 33, the 2nd connection part 44, the 3rd connection part 53) of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50. Are disposed so that the laminated surface f is substantially parallel to the core end surface 1c. Thereby, each connection part (the 1st connection part 33, the 2nd connection part 44, the 3rd connection part 53) of U phase coil 30, V phase coil 40, and W phase coil 50 is brought close without interfering with each other. Therefore, it is possible to suppress an increase in the protruding height of the coil end.

In the first embodiment, as described above, the U-phase coil 30 is provided with a pair of first folded portions 32 that are folded radially outward at the coil end and toward the core end surface 1c. By connecting the tip portions of the pair of first folded portions 32, the first connecting portion 33 disposed in the outer region in the radial direction B than the slot 11 of the stator core 1a and in the vicinity of the core end surface 1c is provided. Provide. Thereby, the 1st connection part 33 can be easily arrange | positioned in the position of the outer side area | region of radial direction, and the vicinity of the core end surface 1c.

In the first embodiment, as described above, the second connection portion 44 of the V-phase coil 40 is disposed in the vicinity of the first connection portion 33. Thereby, since the 2nd connection part 44 of the V-phase coil 40 can be arrange | positioned in the vicinity of the 1st connection part 33 arrange | positioned so that it may adjoin to the core end surface 1c, the protrusion height of a coil end becomes large. Can be further suppressed.

In the first embodiment, as described above, the second connection portion 44 of the V-phase coil 40 has the first portion 45 disposed in the vicinity of the first connection portion 33 of the U-phase coil 30 and the U-phase coil. And a second portion 46 provided so as to straddle the first first folded portion 32. Accordingly, the second connecting portion 44 of the V-phase coil 40 is connected to the first connecting portion 33 while preventing the first folded portion 32 of the U-phase coil 30 and the second connecting portion 44 of the V-phase coil 40 from interfering with each other. It can arrange | position in the vicinity.

In the first embodiment, as described above, the first portion 45 of the second connecting portion 44 is connected to the distal end portion of the second turned-up portion 42 that is turned back to the first connecting portion 33 side. It arrange | positions in the vicinity of the 1st connection part 33 of the coil 30, and connects the 2nd part 46 of the 2nd connection part 44 with the front-end | tip part of the 1st bending part 43 bent by the opposite side to the 1st connection part 33. Thus, the U-phase coil 30 is provided so as to straddle the first folded portion 32. Thereby, the second portion 46 can be easily formed so as to straddle the first folded portion 32 while arranging the first portion 45 in the vicinity of the first connecting portion 33.

In the first embodiment, as described above, the third connecting portion 53 of the W-phase coil 50 is replaced with the first folded portion 32 of the U-phase coil 30, the second folded portion 42 of the V-phase coil 40, and the first bent portion. It is provided so as to straddle the part 43. Thereby, the U-phase coil 30 and the V-phase coil 40 on the inner side in the axial direction and the third connection portion 53 do not interfere with each other, and the third connection portion 53 can be easily connected to the other connection portions (the first connection portion 33 and the first connection portion). 2 connecting portions 44) and can be arranged so as to overlap in the axial direction.

(Second Embodiment)
Next, the configuration of the electric motor 200 according to the second embodiment will be described with reference to FIGS. In the second embodiment, unlike the first embodiment in which the coil ends at both ends of the stator 1 have substantially the same shape (substantially symmetrical shape), the coil ends at both ends of the stator 101 have an asymmetric shape. An example formed in the above will be described. The electric motor 200 is an example of a “rotary electric machine”. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 8, the stator 101 according to the second embodiment includes a plurality of coils 101b (a U-phase coil 130, a V-phase coil 140, and a W-phase coil 150). The U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are arranged at one end (arrow A1 direction side) of the coil end, respectively, of the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 of the first embodiment. Have the same shape. On the other hand, the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are formed such that the coil ends on the other side (arrow A2 direction side) have different shapes from the one side. The U-phase coil 130, the V-phase coil 140, and the W-phase coil 150 are examples of “first coil”, “second coil”, and “third coil”, respectively. The stator 101 is an example of a “rotor electric machine stator”.

As shown in FIGS. 8 and 9, the U-phase coil 130 of the second embodiment has a pair of bent portions that are bent in a substantially S shape radially inward at the coil end on the other side (arrow A2 direction side). 131 and a connecting portion 132 that connects the pair of bent portions 131 to each other. The distal end surface 131a of the bent portion 131 is formed to face outward in the axial direction, and the protruding height of the distal end surface 131a of the bent portion 131 from the core end surface 1c is H11. The connecting portion 132 is formed so as to extend along the circumferential direction, and is formed so that the laminated surface f of the edgewise coil faces the axial end surface of the rotor 2 and is substantially parallel. Further, the connecting portion 132 is disposed on the radially inner side of the stator core 1a so as not to overlap the stator core 1a in the axial direction. At the coil end on the other side of the U-phase coil 130, the pair of bent portions 131 and the connecting portion 132 form a convex portion 133 whose inner side in the axial direction is open.

As shown in FIGS. 8 and 10, the V-phase coil 140 is bent at the other coil end into a bent portion 141 that is bent in a substantially S shape radially inward and into a substantially U shape radially inward. And the connecting portion 143 that connects the distal end portion of the bent portion 141 and the distal end portion of the folded portion 142. Here, a substantially U-shaped folded portion 142 is formed on the opposite side (the other side) of the substantially S-shaped first bent portion 43 at the coil end on one side. Further, a substantially S-shaped bent portion 141 is formed on the opposite side (the other side) of the substantially U-shaped second folded portion 42 at the coil end on one side.

The connecting portion 143 has a stepped shape including a concave first portion 144 that is open on the outside in the axial direction and a convex second portion 145 that is open on the inside in the axial direction, as viewed from the radial direction. The first portion 144 and the second portion 145 are formed so as to extend in an arc shape along the circumferential direction, and the laminated surface f of the edgewise coil is opposed to the axial end surface of the rotor 2 except for the step portion at the center. And it is formed so that it may become substantially parallel. Moreover, the connection part 143 is arrange | positioned so that it may not overlap with an axial direction with the stator core 1a inside the radial direction of the stator core 1a. In the second embodiment, the bent portion 131 of the U-phase coil 130 is disposed in the concave first portion 144.

As shown in FIG. 8 and FIG. 11, the W-phase coil 150 has a pair of bent portions 151 bent in a substantially L shape radially inward at the other coil end, and a diameter from each of the pair of bent portions 151. A pair of straight portions 152 extending inward in the direction and a connecting portion 153 that connects the tip portions of the pair of straight portions 152 are included.

The pair of linear portions 152 extend linearly inward in the radial direction, and are disposed so as to fit inside the convex second portion 145 of the V-phase coil 140 (inward in the axial direction). Further, linear portion 152 is arranged so as to be within the convex portion 133 of U-phase coil 130 (in the axial direction). Further, linear portion 152 passes through the inner side in the axial direction of connecting portion 132 of U-phase coil 130 and extends to the inner side in the radial direction from connecting portion 143 of V-phase coil 140 and connecting portion 132 of U-phase coil 130.

The connecting portion 153 is formed so as to extend along the circumferential direction, and is disposed at a position radially inward of the connecting portion 143 of the V-phase coil 140 and the connecting portion 132 of the U-phase coil 130. The connecting portion 153 is formed such that the end face e of the edgewise coil faces the axial direction, faces the axial end face of the rotor 2, and is substantially parallel. Moreover, the connection part 153 is arrange | positioned so that it may not overlap with an axial direction with the stator core 1a inside the radial direction of the stator core 1a.

The maximum protruding height at the coil end on the other end side of the stator 101 of the second embodiment is the protruding height H11 of the tip surface 131a of the bent portion 131 of the U-phase coil 130. Therefore, the coil ends of the respective phases are arranged so as to be located on the inner side in the axial direction from the convex portion 133 of the U-phase coil 130 having the protruding height H11.

Other configurations of the second embodiment are the same as those of the first embodiment.

In the second embodiment, as described above, the coil ends of the respective phase coils have an asymmetric shape. At the coil end on the other side, the coils of each phase are bent inward in the radial direction, and the connecting portions (132, 143, and 153) of the coils of each phase are axially aligned with the stator core 1a at positions radially inward of the stator core 1a. Arrange them so that they do not overlap. Thus, the connecting portions (132, 143, and 153) at the coil end on the other side do not interfere with the slot 11 (tooth 12) of the stator core 1a when viewed from the axial direction. Therefore, when the coils of the respective phases are mounted on the stator 101, the other coil end of the coil 101b (the U-phase coil 130, the V-phase coil 140, and the W-phase coil 150) is axially (A2 direction) with respect to the slot 11. The coils of each phase can be attached to the stator 101 simply by inserting them into the stator 101.

Also, at the coil end on the other side of the stator 101, the coil of each phase is bent radially inward, and a part of the coil end of each phase opposes (overlaps) the rotor 2 in the axial direction. Even in such a configuration, the coil end on one side (A1 direction side) of the stator 101 does not overlap the rotor 2, so if the rotor 2 is assembled from one side of the stator 101 when the rotor 2 is assembled. The coil end and the rotor 2 do not interfere with each other.

Further, other effects of the second embodiment are the same as those of the first embodiment.

(Third embodiment)
Next, with reference to FIG. 12 and FIG. 13, the structure of the electric motor 300 by 3rd Embodiment is demonstrated. 3rd Embodiment demonstrates the example which provided the coil part for low speeds and the coil part for low speeds to the coil of each phase. The electric motor 300 is an example of a “rotary electric machine”.

In the third embodiment, the coil shape of each phase is arbitrary, and can be applied to any of the coil shapes shown in the first and second embodiments. Therefore, here, an example in which the configuration of the third embodiment is applied to the coils of the first embodiment (the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50) will be described.

As shown in FIG. 12, in the stator 201 according to the third embodiment, the coils 201 b configured by the U-phase coil 30, the V-phase coil 40, and the W-phase coil 50 include the low-speed coil section 260 and the low-speed coil section, respectively. A coil portion 270. Specifically, in each coil 201 b, a part of the laminated rectangular conductor wire constitutes the low-speed coil part 260 and the other part constitutes the low-speed coil part 270. The low speed coil section 260 and the low speed coil section 270 are separated from each other by an insulating member 280. Thus, each coil 201b is configured such that the low-speed coil portion 260 and the low-speed coil portion 270 are disposed in the common slot 11. The stator 201 is an example of a “rotor electric machine stator”.

The low-speed coil section 260 of each coil 201b is used both when the electric motor 300 is driven at low speed and during high-speed driving, and the low-speed coil section 270 is configured to be used only when the electric motor 300 is driven at low speed. Yes. As shown in FIG. 13, the connection state of the low-speed coil section 260 and the low-speed coil section 270 can be switched by the winding switching section CS.

Specifically, the electric motor 300 is connected to the power supply unit BU and the winding switching unit CS, respectively. The electric motor 300 is configured to be driven corresponding to three-phase AC power supplied from the power supply unit BU.

The low-speed coil section 260 and the low-speed coil section 270 of each coil 201b are electrically connected in series. Terminals TU1, TV1, and TW1 on one side of the low-speed coil unit 260 are connected to the power supply unit BU. The terminals TU2, TV2 and TW2 on the other side of the low-speed coil unit 260 and on one side of the low-speed coil unit 270 are connected to the winding switching unit CS. The terminals TU3, TV3, and TW3 on the other side of the low speed coil unit 270 are connected to the winding switching unit CS.

Winding switching unit CS includes a high-speed switch SW1 for short-circuiting terminals TU2, TV2 and TW2 of electric motor 300 and a low-speed switch SW2 for short-circuiting terminals TU3, TV3 and TW3 of electric motor 300.

The winding switching unit CS turns off the high-speed switch SW1 and turns on the low-speed switch SW2 during low-speed driving. As a result, the terminals TU3, TV3 and TW3 are short-circuited, and the four-phase star connection in each phase is configured by the low-speed coil section 260 and the low-speed coil section 270 of the coil 201b with the terminals TU3, TV3 and TW3 as neutral points. Is done. As a result, a voltage is applied to both the low-speed coil unit 260 and the low-speed coil unit 270 in each phase coil 201b of the electric motor 300. Thereby, since the impedance of the coil 201b of each phase becomes large, a large voltage can be applied to the coil 201b, and the torque of the electric motor 300 during low-speed driving can be increased.

The winding switching unit CS turns on the high-speed switch SW1 and turns off the low-speed switch SW2 during high-speed driving. As a result, the terminals TU2, TV2 and TW2 are short-circuited, and a 4-wire star connection in each phase by the low-speed coil section 260 of the coil 201b is configured with the terminals TU2, TV2 and TW2 as neutral points. As a result, a voltage is applied only to the low-speed coil section 260 in each phase coil 201b of the electric motor 300. Thereby, since the impedance of the coil 201b of each phase becomes smaller than that at the time of low speed driving, the electric motor 300 can be driven at high speed.

Other configurations of the third embodiment are the same as those of the first embodiment.

In the third embodiment, as described above, the coil 201b of each phase is provided with the low speed coil unit 270 used only at low speeds and the low speed coil unit 260 used at both high speeds and low speeds. The low speed coil portion 270 and the low speed coil portion 260 are disposed in the common slot 11. Thereby, it is possible to obtain the electric motor 300 that can suppress the protrusion height of the coil end from being increased and can switch the winding according to the driving speed. In the third embodiment shown in FIG. 13, an example in which the connection of the coils 201b of each phase is a 4-parallel star connection is shown. However, the coil connection of each phase may be configured other than the 4-parallel star connection. Is possible.

(Fourth embodiment)
Next, with reference to FIG. 14, the structure of the motor vehicle 400 by 4th Embodiment is demonstrated. The automobile 400 is an example of a “vehicle”.

As shown in FIG. 14, the automobile 400 includes any one of the

electric motors

100, 200, and 300 according to the first to third embodiments. The remaining configuration of the fourth embodiment is similar to that of the aforementioned first to third embodiments.

In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the first to third embodiments, the electric motor and the electric motor stator are shown, but a rotating electric machine such as a generator other than the electric motor and the stator for the electric rotating machine may be used.

In the first to third embodiments, an example of using an edgewise coil in which flat conductor wires are wound and laminated has been shown. However, a coil formed in a band shape by bundling square wires and round wires having a square cross section is used. May be.

In the first to third embodiments, the connecting portions of the U-phase coil, the V-phase coil, and the W-phase coil are formed so as to extend in an arc shape in the circumferential direction, and the connecting portions are circumferentially overlapped in the axial direction. Although an example has been shown, the connecting portions may be formed so as to extend linearly along the circumferential direction, and the connecting portions may be overlapped linearly in the axial direction.

In the first to third embodiments, the connecting portions of the U-phase coil, the V-phase coil, and the W-phase coil are arranged so as to overlap each other along the axial direction in a region radially outside the slot of the stator core. However, the connecting portions may be arranged so as to overlap each other at a position that overlaps with the slots of the stator core in the axial direction, or in a region radially inward of the slots of the stator core, along the axial direction. You may arrange | position a connection part so that it may overlap.

In the first to third embodiments, the example in which the first portion and the second portion are provided in the second connecting portion of the V-phase coil to form a stepped shape is shown. Without providing the first part and the second part in the connecting part (without forming a stepped shape), the first connecting part of the U-phase coil and the third connecting part of the W-phase coil are circular in the circumferential direction. You may form so that it may extend in an arc shape.

In the first to third embodiments, the example in which the connecting portions of the U-phase coil, the V-phase coil, and the W-phase coil are formed so as to be substantially parallel to the core end surface is shown. The connecting portion of the V-phase coil and the W-phase coil may be formed so as to be inclined with respect to the core end surface.

In the first to third embodiments, the connection portions of the U-phase, V-phase, and W-phase coils are formed so as to extend along the circumferential direction of the stator core. Further, it may be formed so as to extend in an arc shape along the circumferential direction, or may be formed so as to extend linearly along the circumferential direction. Moreover, you may form a connection part so that it may extend in curvilinear form other than circular arc shape along the circumferential direction.

Further, in the fourth embodiment, the example in which the motor of the first to third embodiments is provided in an automobile is shown. However, the first to the second are applied to a vehicle such as a construction machine or an agricultural vehicle. You may provide the electric motor of 3 embodiment. In addition to the vehicle, for example, the electric motors of the first to third embodiments may be provided in a ship, an aircraft, or the like.

1, 101, 201 Stator (stator for rotating electrical machine)

1a Stator core

1b, 101b, 201b Coil 2 Rotor 11

Slot

30, 130 U-phase coil (first coil)
31 Coil side (axial part)
32 1st folding | returning part (Axial direction part, bending part)
33 1st connection part (connection part)
40, 140 V-phase coil (second coil)
41 Coil side (axial part)
42 2nd turning part (axial part, bent part)
43 1st bending part (axial direction part, bending part)
44 2nd connection part (connection part)
45 First part 46 Second part 50, 150 W-phase coil (third coil)
51 Coil side (axial part)
52 Second bent part (axial part, bent part)
53 3rd connection part (connection part)
100, 200, 300 Electric motor (rotary electric machine)
260 Coil part for low speed 270 Coil part for low speed 400 Automobile (vehicle)
e End face (second face)
f Laminated surface (first surface)

Claims

A rotor (2);
A stator (1) including a stator core (1a) having a plurality of slots (11) and arranged to face the rotor, and a plurality of coils (1b) mounted concentrically in the slots of the stator core. )
The coil is a belt-like coil having a wide first surface (f) and a narrow second surface (e) orthogonal to the first surface, and is provided corresponding to each phase of a three-phase alternating current. A first coil (30), a second coil (40), and a third coil (50),
The rotating electrical machine, wherein the first coil, the second coil, and the third coil are arranged so as to overlap along an axial direction of the stator core with the first surfaces facing each other at a coil end.
Each of the first coil, the second coil, and the third coil includes a pair of axial portions (31, 32, 41, 42, 43, 51, 52) extending in an axial direction of the stator core, and the pair of coils. A connecting portion (33, 44, 53) for connecting the axial portion at the coil end,
2. The rotating electrical machine according to claim 1, wherein the first coil, the second coil, and the third coil are arranged such that the first surfaces of the connecting portion overlap along an axial direction of the stator core. .
The connecting portion of each of the first coil, the second coil, and the third coil is formed to extend along a circumferential direction of the stator core,
The first coil, the second coil, and the third coil are arranged so that the first surfaces of the connecting portion extending in the circumferential direction overlap with each other as seen from the axial direction of the stator core. The rotating electrical machine according to claim 2.
The coil is a band-shaped edgewise coil in which flat conductor wires are wound and laminated,
The first surface comprises a laminated surface on which the flat conductor wires are laminated,
2. The rotating electrical machine according to claim 1, wherein the first coil, the second coil, and the third coil are arranged such that the stacked surfaces overlap each other along the axial direction of the stator core.
The first coil, the second coil, and the third coil are arranged such that the connecting portions overlap each other along the axial direction of the stator core in a radially outer region of the stator core than the slot of the stator core. The rotating electrical machine according to claim 2, wherein the rotating electrical machine is arranged.
The pair of axial portions each include a bent portion (32, 42, 43, 52) bent outward in the radial direction of the stator core at a coil end,
6. The rotating electrical machine according to claim 5, wherein the connecting portion is disposed in a radially outer region of the stator core with respect to the slot of the stator core by connecting tip portions of the bent portions.
The coil is a band-shaped edgewise coil in which flat conductor wires are wound and laminated,
The rotating electrical machine according to claim 6, wherein the bent portion is bent outward in the radial direction of the stator core along a stacking direction of the rectangular conductive wires.
The connecting portion of the first coil is disposed in a radially outer region of the stator core with respect to the slot of the stator core, and at a position near the axial end surface of the stator core,
The rotation according to claim 6, wherein the connecting portion of the second coil and the connecting portion of the third coil are arranged at positions outside the connecting portion of the first coil in the axial direction of the stator core. Electric.
The connection portions of each of the first coil, the second coil, and the third coil are all disposed such that the first surface is substantially parallel to the axial end surface of the stator core. The rotating electrical machine described in 1.
The bent portion of the pair of axial portions of the first coil is a first folded portion (32) folded at the coil end on the radially outer side of the stator core and toward the axial end surface side of the stator core. And
The connecting portion of the first coil is a radially outer region of the stator core with respect to the slot of the stator core by connecting tips of the first folded portions of the pair of axial portions, and The rotating electrical machine according to claim 8, further comprising a first connecting portion (33) disposed at a position in the vicinity of the axial end surface of the stator core.
The at least one of the connecting portion of the second coil and the connecting portion of the third coil is disposed in the vicinity of the first connecting portion disposed at a position near the axial end surface of the stator core. The rotating electrical machine according to 10.
The connecting portion of the second coil is provided so as to straddle the first portion (45) disposed in the vicinity of the first connecting portion of the first coil and the first folded portion of the first coil. The rotating electrical machine according to claim 11, comprising a second connecting portion (44) having a second portion (46).
Of the pair of axial portions of the second coil,
The bent portion of one of the axial portions has a second folded portion (42) folded back toward the first coupling portion side of the first coil at the coil end on the radially outer side of the stator core. Have
The other bent portion of the axial direction portion is a first bent portion (43) which is bent radially outward of the stator core at the coil end and toward the opposite side of the first coupling portion of the first coil. )
The first portion of the second connection portion is disposed in the vicinity of the first connection portion of the first coil by being connected to a tip portion of the second folded portion,
The said 2nd part of a said 2nd connection part is provided so that it may straddle the said 1st folding | turning part of a said 1st coil by connecting with the front-end | tip part of a said 1st bending part. Rotating electric machine.
The third coil connecting portion includes a third connecting portion (53) provided so as to straddle the first folded portion of the first coil, the second folded portion of the second coil, and the first bent portion. The rotating electrical machine according to claim 13, comprising:
The coil includes a low speed coil portion (270) used only at a low speed and a low speed coil portion (260) used at both a high speed and a low speed,
The rotating electrical machine according to claim 1, wherein the low-speed coil unit and the low-speed coil unit are configured to be disposed in the common slot.
A stator core having a plurality of slots;
A plurality of coils mounted concentrically on the slots of the stator core,
The coil is a strip-shaped coil having a wide first surface and a narrow second surface orthogonal to the first surface, the first coil provided corresponding to each phase of three-phase alternating current; Including a second coil and a third coil;
The stator for a rotating electrical machine, wherein the first coil, the second coil, and the third coil are arranged so as to overlap along an axial direction of the stator core with the first surfaces facing each other at a coil end.
Each of the first coil, the second coil, and the third coil includes a pair of axial portions extending in the axial direction of the stator core, and a connecting portion that connects the pair of axial portions at a coil end.
The rotating electrical machine according to claim 16, wherein the first coil, the second coil, and the third coil are arranged such that the first surfaces of the connecting portion overlap each other along an axial direction of the stator core. Stator.
The connecting portion of each of the first coil, the second coil, and the third coil is formed to extend along a circumferential direction of the stator core,
The first coil, the second coil, and the third coil are arranged so that the first surfaces of the connecting portion extending in the circumferential direction overlap with each other in a circumferential direction when viewed from the axial direction of the stator core. The stator for a rotating electrical machine according to claim 17.
The coil is a band-shaped edgewise coil in which flat conductor wires are wound and laminated,
The first surface comprises a laminated surface on which the flat conductor wires are laminated,
19. The stator for a rotating electrical machine according to claim 18, wherein the first coil, the second coil, and the third coil are arranged such that the laminated surfaces overlap each other along the axial direction of the stator core.
The first coil, the second coil, and the third coil are arranged such that the connecting portions overlap each other along the axial direction of the stator core in a radially outer region of the stator core than the slot of the stator core. The stator for a rotating electrical machine according to claim 19, wherein the stator is disposed.
A vehicle (400) comprising a rotating electrical machine (100),
The rotating electric machine is
A rotor (2);
A stator (1) having a plurality of slots (11) and having a stator core (1a) arranged to face the rotor, and a plurality of coils (1b) mounted concentrically in the slots of the stator core. ) And
The coil is a strip-shaped coil having a wide first surface (f) and a narrow second surface (e) orthogonal to the first surface, and is provided corresponding to each phase of a three-phase alternating current. A first coil (30), a second coil (40), and a third coil (50),
The vehicle, wherein the first coil, the second coil, and the third coil are arranged so as to overlap along the axial direction of the stator core with the first surfaces facing each other at a coil end.