JP7058698B2 - Rotating electric machine - Google Patents

Description

The present application relates to a rotary electric machine .

In recent years, rotary electric machines such as electric motors and generators are required to be compact, have high output, and have high efficiency. In order to meet these demands, especially in an in-vehicle motor, a distributed winding using a coil having a substantially rectangular cross section is adopted. The stator of the distributed winding has a feature that the noise is small because the rotating magnetic field is distributed smoothly as compared with the concentrated winding. Further, by using a coil having a substantially rectangular short surface, there is an effect that the space factor of the coil can be improved and the output can be increased as compared with the case where a winding is formed by bundling round wires.

On the other hand, when a coil end is configured using a coil with a rectangular cross section, if the corners of the rectangular cross section come into contact with each other, the surface pressure applied to the film may increase and the insulation may deteriorate. It is necessary to mold it three-dimensionally so that it does not interfere. Further, it is desirable to provide a desired gap in the coil end not only to avoid interference but also to cool the coil end. Further, it is possible to reduce the size of the coil end by reducing the bending radius when the coil end is formed, but if the bending radius is reduced, the insulating film may be peeled off and the insulating property may be deteriorated. As described above, it is necessary to satisfy all of the requirements of providing an appropriate gap in the coil end, improving the reliability of the insulating film, and reducing the size of the coil end.

In order to solve this problem, for example, in the rotary electric machine of Patent Document 1, in the stator winding, the coil turn portion of the coil end apex of the coil that orbits continuously a plurality of times is laminated on a concentric semicircle. , A structure has been proposed in which a space is provided between the coil turn portions so as to penetrate from the inner peripheral side to the outer peripheral side. It is described that such a structure can avoid interference at the coil end portion and improve the cooling performance.

Japanese Patent No. 5770074

However, in the rotary electric machine of Patent Document 1, since the turn portion connecting the slot portions is composed of a circumferential bending portion, a hypotenuse portion, an axial rising portion, and a radial shift portion, the coil end is enlarged. There was a problem to do. That is, even if the hypotenuses are aligned, the coil is obtained by adding the bending radius of the vertical rising portion, the bending radius of the radial bending portion in the radial shift portion, and the coil stacking thickness. The end will be high. Further, when the bending radius is reduced, the coil end can be theoretically miniaturized, but the damage to the insulating film of the coil is increased, so that the insulating property is deteriorated. Further, it is possible to reduce the size of the coil end by reducing the gap between the hypotenuses, but the smaller gap makes it easier for interference during assembly and reduces productivity.

This application has been made to solve the above-mentioned problems, avoiding an increase in the size of the coil end, reducing damage to the insulating film of the coil of the stator winding, and suppressing deterioration of the insulating property. The purpose is to provide a rotary electric machine that can be used.

The rotary electric machine disclosed in the present application includes an annular stator core in which a plurality of slots opened on the inner peripheral side are arranged in the circumferential direction, and a stator winding mounted on the stator core. , The stator winding has a slot portion inserted into the slot and a turn portion connecting the adjacent slot portions to each other, and the turn portion includes an inner diameter shift portion, a shift center portion, and an outer portion. It has a radial shift portion including a radial shift portion, and is composed of an inner layer side turn portion which is laminated in the axial direction of the stator core and arranged on the inner layer side and an outer layer side turn portion which is arranged on the outer layer side. The shift central portion of the inner layer side turn portion is characterized in that it has a concave shape in the inner direction in the axial direction with respect to a surface orthogonal to the axial direction.

According to the rotary electric machine disclosed in the present application, the length of the hypotenuse portion is increased by shifting the shift inner diameter portion and the shift outer diameter portion of the radial shift portion constituting the turn portion of the coil of the stator winding in the circumferential direction. It is possible to make the coil end smaller, which has the effect of realizing the miniaturization of the coil end.

It is sectional drawing which shows the schematic structure of the rotary electric machine which concerns on Embodiment 1. FIG. It is an external perspective view which shows the structure of the stator in Embodiment 1. FIG. It is a figure which shows the external perspective view and the part AA of the coil which constitutes the stator winding in Embodiment 1. FIG. It is a schematic diagram which shows the structure of the rotary electric machine which concerns on Embodiment 1. FIG. It is a figure which shows the connection relationship between a coil and an inverter device in Embodiment 1. FIG. It is a figure which shows the connection relation between the coils in Embodiment 1. FIG. It is a figure which shows the structure of the inner layer turn part among the turn part of the coil in Embodiment 1. FIG. It is a schematic diagram of the turn part of the coil in Embodiment 1. FIG. It is a figure which shows the structure of the inner layer turn part and the outer layer turn part of the turn part of the coil in Embodiment 1. FIG. It is a figure which shows the method of forming a coil in Embodiment 1. FIG. It is a 1st schematic diagram which shows the method of forming the turn part of a coil in Embodiment 1. FIG. It is a 2nd schematic diagram which shows the method of forming the turn part of a coil in Embodiment 1. FIG. It is a figure which shows the cross section of the DD part of FIG. It is a figure which shows the cross section of the DD part by another embodiment of FIG. It is a schematic diagram which shows the method of forming the turn part of a coil in Embodiment 1. FIG. It is a schematic diagram which shows the method of forming the turn part of a coil in Embodiment 2. FIG. It is a schematic diagram which shows the formation method by another embodiment of the turn part of the coil in Embodiment 2. FIG. It is a schematic diagram which shows the formation method by still another Embodiment of the turn part of the coil in Embodiment 2. FIG. It is a schematic diagram of the turn part of the coil in Embodiment 3. FIG.

Embodiment 1.
FIG. 1 is a cross-sectional view showing a schematic configuration of a rotary electric machine according to the first embodiment. FIG. 2 is a perspective view showing the configuration of the stator. FIG. 3 is a view showing an external perspective view and a partial view of the coil constituting the stator winding. FIG. 4 is a schematic diagram showing the configuration of a rotary electric machine. Further, FIG. 5 is a diagram showing a connection relationship between the coil and the inverter device.

First, with reference to FIG. 1, the overall configuration of the rotary electric machine according to the first embodiment will be described.
In FIG. 1, the rotary electric machine 11 has a bottomed cylindrical housing 1, a bracket 2 that closes an opening of the housing 1, and a stator 3 that is shrink-fitted into the housing 1 or fixed by press-fitting or other fixing means. , The rotary shaft 5 rotatably supported on the bottom of the housing 1 and the bracket 2 via the bearing 4, and the rotor 6 fixed to the rotary shaft 5 and rotatably arranged on the inner peripheral side of the stator 3. I have.

Here, the rotors 6 are arranged at a predetermined pitch in the circumferential direction by being embedded in the rotor core 7 fixed to the rotation shaft 5 inserted at the axial center position and on the outer peripheral surface side of the rotor core 7. It is a permanent magnet type rotor provided with a permanent magnet 8 constituting a magnetic pole.

Next, the configuration of the stator 3 will be specifically described with reference to FIGS. 2 to 5.
In the following description, the rotation axis direction (vertical direction in FIG. 1) is defined as the axial direction, the rotation axis center direction (horizontal direction in FIG. 1) is defined as the radial direction, and the rotation direction centered on the rotation axis is defined as the circumferential direction. I will explain.

As shown in the external perspective view of FIG. 2, the stator 3 includes a stator core 9 and a stator winding 10 which is mounted on the stator core 9 and is composed of a coil 12 formed of a conductor. I have. Here, for convenience, a case where the stator winding 10 is a three-phase winding in the case where the number of poles is 8 and the number of slots of the stator core 9 is 48 will be described. That is, the slots are formed in the stator core 9 at a rate of two per pole and each phase.

3 (a) shows an external perspective view of the coil 12, and FIG. 3 (b) shows a partial view of the coil 12, and FIG. 3 (a) shows a slot portion 23 of the coil 12 in the cross section of the AA portion of FIG. 3 (a). The twisting method in (S1 to S8) is shown.

As shown in the schematic diagram of FIG. 4A, the stator core 9 has a teeth portion 21 extending inward in the radial direction and a slot 22 divided in the circumferential direction by the teeth portions 21. Further, as shown in FIG. 4B, the coil 12 protrudes from the slot portions 23 (S1 to S8) mounted in the slot 22 of the stator core 9 and the slot 22 of the stator core 9 in the circumferential direction. Axial from the turn portion 24 (T1-2, T2-3, T3-4, T4-5, T5-6, T6-7, T7-8) having different slots 22 and the slot 22 of the stator core 9. It has an outer peripheral side terminal 25 (T1A) and an inner peripheral side terminal 26 (T8A) for projecting and connecting to another coil 12 of the stator winding 10. For example, when a current is supplied from the outer peripheral side terminal 25, a current flows through the slot portion 23 and the coil ends 20a and 20b, and the inner peripheral side terminal 26 is connected to another adjacent coil 12. In this way, a magnetic field can be generated by passing an electric current through the coil 12.

Here, the slot portions 23 of S1 to S4 are connected by a turn portion 24 straddling a 6-slot pitch in the circumferential direction, and are wound at intervals equal to the polar pitch. S4 and S5 are connected via T4-5, are connected by a turn portion 24 straddling a 5-slot pitch in the circumferential direction, and are formed in the stator core 9 at a ratio of two per pole and phase. The slots 22 are connected to each other. Similar to S1 to S4, S5 to S8 are connected by a turn portion 24 across a 6-slot pitch. The outer peripheral side terminal 25 and the inner peripheral side terminal 26 are connected to the inverter device 13 as a feeding unit for joining the coils 12 to each other or supplying a voltage.

FIG. 5 shows an example of a wiring diagram of the stator winding 10. U1 to U8 show coils 12 constituting the U phase of three-phase alternating current, and are fed from the inverter device 13 by the outer peripheral side terminal 25 or the inner peripheral side terminal 26. Further, the coil 12 to which these terminal portions are joined is connected to the neutral point 14 via the outer peripheral side terminal 25 or the inner peripheral side terminal 26. V1 to V8 indicate the coil 12 constituting the V phase, and W1 to W8 indicate the coil 12 constituting the W phase. Similarly, by being connected to the feeding portion and the neutral point 14, three-phase winding is performed. The line is composed.

In this way, as shown in FIG. 2, the stator 3 is configured by arranging 24 coils 12 for one round and inserting the stator core 9 from the outer diameter side. In this embodiment, the configuration of the stator 3 when the stator core 9 is divided and inserted from the outer diameter side has been described as an example, but the inner diameter of the stator 3 having no dividing surface in the circumferential direction has been described. The coil 12 may be inserted from the side.

FIG. 6 shows a connection pattern in the U phase of the stator winding 10. Uin indicates a U-phase feeding unit in three-phase alternating current, and Uout is connected to the neutral point 14. Slot No. Indicates the numbers of the 48 slots 22 of the stator core 9, and the numbers in the square indicate the connection order from the Uin. The portion surrounded by the ellipse represents the coil 12 shown in FIG. 3, and the thick line indicates the connection portion of the terminal line. In this way, by continuously winding the coil 12 for two slots, the number of coils can be reduced, which has the effect of improving the productivity at the time of assembly. As a result, the number of joints can be reduced, which also has the effect of improving productivity. Further, by reducing the number of joints, the distance between the joints becomes longer, so that there is an effect of improving the insulation between the connection portions.

Here, the details of the structure of the turn portion 24 of the coil 12 in the present embodiment will be described with reference to FIGS. 7 to 9. The turn portion 24 is composed of a continuous conductor including a circumferential bending portion 101, a hypotenuse portion 102, and a radial shift portion 104.

FIG. 7 shows the configuration of the inner layer side turn portion 110 corresponding to T3-4 and T7-8 shown in FIG. 3 among the turn portions 24 in the coil 12. Here, for the sake of explanation, a shape in which the arcuate turn portion 24 is linearly developed will be described. That is, the left-right direction in FIG. 7A is the circumferential direction, and the originally arcuate shape is developed in a straight line and shown, and the vertical direction indicates the radial direction and the paper surface direction indicates the axial direction. .. Further, FIG. 8 shows a schematic view of the inner layer side turn portion 110 and the outer layer side turn portion 111, and FIG. 9 shows a plan view and a perspective view of the inner layer side turn portion 110 and the outer layer side turn portion 111. Is.

First, as shown in FIG. 7, the slot portion 23 of the coil 12 housed in the slot 22 of the stator 3 has a circumferentially bent portion 101, a hypotenuse portion 102, and a radial shift due to a turn portion 24 protruding in the axial direction. It is continuously connected to the slot portion 23 of another coil 12 via the portion 104. The slot portions 23 connected by the turn portion 24 are separated from each other in the circumferential direction and are accommodated in another slot 22 which is different in the radial direction. The radial shift portion 104 moves in the radial direction at the top of the turn portion 24, and such a configuration has an effect that interference between the turn portions 24 adjacent to each other in the circumferential direction can be avoided. ..

Here, as shown in FIG. 8, the radial shift portion 104 is composed of an inner diameter shift portion 104a, a shift center portion 104c, and an outer diameter shift portion 104b. The inner diameter shift portion 104a and the outer diameter shift portion 104b are displaced in the circumferential direction when viewed from the radial direction. As a result, the length A of the hypotenuse can be shortened as compared with the conventional example. Therefore, there is an effect that the height of the turn portion 24 can be reduced and the coil ends 20a and 20b can be miniaturized.

Further, as shown in FIG. 8, the radial shift portion 104 is inclined with respect to the axial direction. Therefore, as shown in FIG. 8, the bending inner diameter R of the inner diameter shifting portion 104a seen from the circumferential direction is apparently smaller than the bending inner diameter R of the inner diameter shifting portion 104a seen from the circumferential direction of the conventional example. be able to. Therefore, there is an effect that the height of the turn portion 24 can be reduced by reducing the axial height required for the inner diameter shift portion 104a, and the coil ends 20a and 20b can be miniaturized.

Further, by making the shift central portion 104c substantially linear, the height of the turn portion 24 can be suppressed as compared with the case where the bending inner diameter R is uniform as in the conventional example, and the coil end 20a, There is an effect that 20b can be miniaturized.

Here, in the hypotenuse portion 102, it is desirable that the inner layer side turn portion 110 and the outer layer side turn portion 111 are aligned in a straight line in the radial direction. Since the hypotenuse 102 is aligned in a straight line in the radial direction, it is less likely to interfere with the adjacent hypotenuse 102 as compared with the case where the hypotenuse 102 is not aligned. The height of 24 can be suppressed, and there is an effect that the coil ends 20a and 20b can be miniaturized.

As shown in FIG. 9A, it is desirable that the radial shift portion 104 includes a circumferential movement component. By including the circumferential movement component in the radial shift portion 104, the length of the hypotenuse portion 102 extending in the circumferential direction can be shortened, and there is an effect that the coil ends 20a and 20b can be miniaturized.

Here, as shown in FIG. 9B, it is desirable to provide a cooling space 107 that penetrates in the radial direction between the radial shift portions 104 that are adjacent to each other in the circumferential direction. Providing a space has the effect of improving cooling performance. Further, by providing a fan for generating a radial fluid flow on the rotor side, there is an effect of further improving the cooling property. Further, since there is a distance between the radial shift portions 104, there is also an effect of improving the insulating property.

Further, as shown in FIG. 9B, a hypotenuse gap 108 may be provided between the hypotenuse portions 102 adjacent to each other in the circumferential direction. Providing a gap has the effect of improving cooling performance. Further, by providing a fan for generating a radial fluid flow on the rotor side, there is an effect of further improving the cooling property. Further, the distance between the hypotenuse portions 102 also has an effect of improving the insulating property.

Further, as shown in FIG. 9D, it is desirable that the radial movement amount of the radial shift portion 104 is larger than the radial movement distance in the slot portion 23. With such a configuration, it is possible to lengthen the section of the continuous twisted portion as compared with the case where the amount of movement of the radial shift portion 104 is the same as the case where the amount of radial movement in the slot portion 23 is the same. It has the effect of reducing damage to the film and improving the reliability of insulation.

Next, an example of the molding method of the turn portion 24 in the first embodiment will be described. FIG. 10 is a schematic view showing how the magnet wire 15, which is the material of the coil 12, is wound around the winding frame 131 with the circumferential direction as the center of rotation. The winding frame 131 is composed of a short side straight portion 131a, a curved side straight portion 131b, and a long side straight portion 131c, and the short side straight portion 131a corresponds to the shift center portion 104c. The magnet wire 15 wound around the bobbin 133 is wound around the winding frame 131 through the guide 132 to form the winding coil 12a.

FIG. 11 is a first schematic diagram showing a method of forming the turn portion 24. Further, FIG. 12 is a second schematic view showing a method of forming the turn portion 24.
First, as shown in FIG. 11, the slot portion 23 of the take-up coil 12a is gripped by the outer diameter side slot portion holding member 121 and the inner diameter side slot portion holding member 120. Next, the hypotenuse 102 is gripped by the inner diameter side hypotenuse holding member 122 and the outer diameter side hypotenuse holding member 123.

As shown in FIG. 12, here, it is desirable that the outer diameter side hypotenuse holding member 123 regulates the radial direction and the circumferential direction of the hypotenuse 102. Then, as shown in FIG. 11, the outer diameter side slot portion holding member 121 and the inner diameter side slot portion holding member 120 are relatively moved in the circumferential direction, and at the same time, the outer diameter side hypotenuse portion holding member 123 and the inner diameter side hypotenuse side. The portion holding member 122 is moved to the lower part in the axial direction while rotating with the radial direction as the rotation axis direction. In this way, the turn portion 24 in the first embodiment can be obtained. FIG. 13 shows a cross section of the DD portion of FIG. Further, FIG. 14 shows a cross section of the DD portion of FIG. 12 in another embodiment.

By adopting such a manufacturing method in the formation of the turn portion 24, it is not necessary to regulate the radial shift portion 104 that has been processed once and has damage to the insulating film, so that the reliability of the insulating property is improved. effective. Further, by restricting the hypotenuse portion 102, the coil 12 of the stator winding 10 of the rotary electric machine 11 can be obtained by one molding, which has an effect of improving productivity. Here, it is desirable that the outer diameter side slot portion holding member 121 and the inner diameter side slot portion holding member 120 regulate the circumferential direction and the radial direction of the slot portion 23. By restricting the slot portion 23, the slot portion 23 is not twisted, so that there is an effect that the space factor of the coil 12 can be improved and the output can be increased.

As described above, in the present embodiment, when the coil 12 constituting the stator winding 10 is formed, the shift central portion 104c of the radial shift portion 104 is formed in advance to divide the process. The number of steps can be reduced as compared with the case of molding by molding, which has the effect of improving productivity.

In the present embodiment, the case where the winding frame 131 having the short side straight portion 131a is used from the beginning has been described, but as shown in the schematic diagram of the method of forming the turn portion of the coil in FIG. 15, the outer diameter side By pressurizing the take-up coil 12a in the axial direction with the mold 135 while restricting the circumferential direction and the radial direction of the slot portion 23 by the slot portion holding member 121 or the inner diameter side slot portion holding member 120, the winding coil 12a is substantially linear. It may be a method of forming the shift central portion 104c.

Further, in the present embodiment, the case of the structure having the turn portions 24 on both sides in the axial direction has been described, but at least the turn portions continuously connected to one side in the axial direction may be provided. That is, the same effect can be obtained even if it is applied to a structure called a segment conductor method in which a continuous turn portion is provided only on one side in the axial direction.

Further, in the description of the present embodiment, the shift central portion 104c is assumed to be substantially linear, but even if the shift central portion 104c is not a perfect linear shape, at least the bending inner diameter R of the inner diameter shift portion 104a and the outer diameter shift portion 104b may be formed. The same effect can be obtained even with a curved shape having a bending inner diameter R larger than the bending inner diameter R.

As described above, according to the rotary electric machine according to the first embodiment, the hypotenuse is formed by shifting the inner diameter shift portion and the outer diameter shift portion of the radial shift portion constituting the turn portion of the coil of the stator winding in the circumferential direction. It is possible to reduce the length of the portion, which has the effect of realizing miniaturization of the coil end. As a result, it is possible to avoid an increase in the size of the coil end, reduce damage to the insulating film of the coil of the stator winding, and suppress deterioration of the insulating property.

Embodiment 2.
FIG. 16 is a schematic view showing a method of forming a turn portion of the coil according to the second embodiment. The second embodiment will be described only with respect to the differences from the first embodiment.

In the first embodiment, as shown in FIGS. 10 and 15, a substantially linear shift central portion 104c is formed in the state of the take-up coil 12a. On the other hand, in the second embodiment, first, as shown in FIG. 16A, the slot portion 23 of the coil 12 is moved in the circumferential direction, and then the inner diameter side slot regulating portion 141 and the outer diameter side slot regulating portion 141 are restricted. The slot portion 23 is regulated by the portion 142. After that, as shown in FIG. 16A, the coil 12 is pressurized in the axial direction by the turn portion pressurizing member 143 to obtain a substantially linear shift central portion 104c.

By using such a forming method, the coil 12 can be made into a simple shape as shown in FIG. 14 at the time of winding, which has an effect of improving productivity. Further, as shown in FIG. 16B, since it has the effect of reducing the variation in the B dimension, which is the vertical dimension of the coil 12, it is possible to suppress the height variation of the turn portion 24 and stabilize the shape. This has the effect of reducing interference during assembly and improving productivity.

Further, FIG. 17 is a schematic view showing a forming method according to another embodiment of the turn portion of the coil. A method of forming a turn portion by mounting the coil 12 on the stator core 9 (FIG. 17 (a)) and then pressurizing the coil 12 from the axial direction by the turn portion pressurizing member 143 (FIG. 17 (b)). It shows. With such a configuration, in addition to obtaining a substantially linear shift center portion 104c, the hypotenuse gap 108 can be reduced, so that the coil ends 20a and 20b can be further miniaturized. be.

Further, FIG. 18 is a schematic view showing a method of forming the turn portion of the coil according to still another embodiment. The method of forming the turn portion 24 when there is a dimensional restriction on the inner and outer diameters of the coil ends 20a and 20b is shown, and the coil 12 is regulated by the inner diameter side regulating member 145 and the outer diameter side regulating member 146 (FIG. 18 (a). )), The pressure is applied in the axial direction by the turn portion pressurizing member 143 (FIG. 18 (b)). By such a method, since the inner diameter and outer diameter dimensions of the turn portion 24 can be reliably controlled, there is an effect of reducing the defect rate and reducing the cost.

Embodiment 3.
FIG. 19 is a schematic view of the turn portion of the coil according to the third embodiment. The third embodiment will be described only with respect to the differences from the first embodiment. Here, for the sake of explanation, a shape in which an arcuate turn portion is developed in a straight line will be described. That is, the left-right direction in FIG. 19 (a) is the circumferential direction and the originally arcuate shape is shown in a linearly developed manner, and the vertical direction indicates the radial direction and the paper surface direction indicates the axial direction.

In the present embodiment, as shown in FIG. 19, the shift central portion 104c of the inner layer side turn portion 110 has a concave shape in the inward direction in the axial direction. With such a configuration, the height of the turn portion 24 can be further reduced, and there is an effect of reducing the size of the coil ends 20a and 20b.

Further, the shift central portion 104c of the outer layer side turn portion 111 is substantially linear. By providing a substantially linear portion on the outer layer side turn portion 111, positioning becomes easy and there is an effect of improving productivity.

Although various exemplary embodiments and examples are described in this application, the various features, embodiments, and functions described in one or more embodiments are specific embodiments. It is not limited to the application of the embodiment, but can be applied to the embodiment alone or in various combinations.
Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

Further, in the figure, the same reference numerals indicate the same or corresponding parts.

1 housing, 2 brackets, 3 stators, 4 bearings, 5 hypotenuses, 6 hypotenuses, 7 rotor cores, 8 permanent magnets, 9 stator cores, 10 stator windings, 11 rotary electric machines, 12 coils, 12a windings Taking coil, 13 Inverter device, 14 Neutral point, 15 Magnet wire, 20a, 20b Coil end, 21 teeth part, 22 slots, 23 slots part, 24 turns part, 25 outer peripheral side terminal, 26 inner peripheral side terminal, 101 laps Directional bending part, 102 hypotenuse part, 104 radial shift part, 104a inner diameter shift part, 104c shift center part, 104b outer diameter shift part, 107 cooling space, 108 hypotenuse gap, 110 inner layer side turn part, 111 outer layer side turn part , 120 inner diameter side slot holding member, 121 outer diameter side slot holding member, 122 inner diameter side hypotenuse holding member, 123 outer diameter side hypotenuse holding member, 131 winding frame, 131a short side straight part, 131b curved part, 131c Long side straight part, 133 bobbin, 141 inner diameter side slot regulation part, 142 outer diameter side slot regulation part, 143 turn part pressurizing member, 145 inner diameter side regulation member, 146 outer diameter side regulation member

Claims (2)

An annular stator core in which multiple slots opened on the inner peripheral side are arranged in the circumferential direction,
With a stator winding mounted on the stator core,
The stator winding has a slot portion inserted into the slot and a turn portion connecting adjacent slot portions to each other.
The turn portion has an inner diameter shift portion, a shift center portion, and a radial shift portion including an outer diameter shift portion, and is laminated in the axial direction of the stator core and arranged on the inner layer side. It is composed of a part and a turn part on the outer layer side arranged on the outer layer side.
A rotary electric machine characterized in that the shift central portion of the inner layer side turn portion has a concave shape in the inner direction in the axial direction with respect to a surface orthogonal to the axial direction. The rotary electric machine according to claim 1, wherein a space is provided between the turn portion adjacent to the circumferential direction and the radial shift portion in the radial direction of the stator core.

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