JP2017216832A - Stator for rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for a rotary electric machine capable of suppressing dripping of a refrigerant supplied to a coil end.SOLUTION: An axial line of a stator according to the present invention indicates a horizontal direction and the stator is configured to supply a refrigerant from a vertically upper side to a coil end 4. The stator comprises: a stator core 2 with which a slot 22 is formed; and a stator coil 3 formed by joining multiple segment conductor type coils 30 that are inserted into the slot 22. The stator coil 3 constitutes multiple inclined part coil ends by having multiple inclined parts protruding axially outwards from an end face of the stator core 2. Regarding spacing between two inclined parts that are positioned vertically higher than an axial line and adjacent to each other in a circumferential direction, inner circumferential side spacing S2 is smaller than outer circumferential side spacing S1. Regarding spacing between two inclined parts that are positioned vertically lower than the axial line and adjacent to each other in the circumferential direction, outer circumferential side spacing S2 is smaller than inner circumferential side spacing S1.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stator for a rotating electrical machine.

In recent years, rotating electric machines are mounted on vehicles. The rotating electrical machine is used as an electric motor that generates driving force or a generator that generates electricity during deceleration.
In such a rotating electrical machine, a refrigerant is supplied to the coil end in order to suppress the temperature rise of the stator coil.

Here, the coil end is an assembly of portions (hereinafter referred to as “folded portions”) of the stator coil that are folded back in the axial direction outside the end surface of the stator core in the radial direction.
Moreover, the folding | turning part is comprised by a pair of inclination part extended while having a predetermined inclination angle with respect to the end surface of a stator core.
That is, the coil end is composed of a plurality of inclined portions arranged in the circumferential direction, and has a ring shape when viewed from the axial direction.

  And in the conventional rotary electric machine, the refrigerant | coolant is supplied from the perpendicular direction upper side of a coil end. According to this, due to its own weight, the refrigerant sequentially moves from the inclined portion on the upper side in the circumferential direction to the inclined portion on the lower side in the circumferential direction, and the entire coil end is cooled.

A stator coil is wound around the teeth of the stator core while shifting the position in the radial direction. That is, a plurality of inclined portions constituting the coil end are provided in the radial direction.
And in the coil end of patent document 1, the inclination angle of the inclination part of an outer peripheral side is larger than the inclination angle of the inclination part of an inner peripheral side.
For this reason, the inner peripheral inclined portion is exposed from between the outer peripheral inclined portions, and the refrigerant is easily supplied to the inner peripheral inclined portion.

By the way, recent stator coils are constituted by segment conductor type coils. In such a stator coil, a gap is formed between two inclined portions adjacent in the circumferential direction. In particular, according to the coil end of Patent Document 1, the gap between the inclined portions on the outer peripheral side is larger than the gap between the inclined portions on the inner peripheral side.
From the above, when the refrigerant moves between the inclined portions located on the lower side in the vertical direction than the axis, the refrigerant is likely to droop from the gap between the inclined portions on the outer peripheral side.
Under such circumstances, in the stator of Patent Document 2, a temperature sensor is brought into contact with the radially outer side of the inclined portion on the outer peripheral side, which is lower in the vertical direction than the axis, to prevent dripping.

JP 2012-222922 A JP 2014-209817 A

However, according to the above-mentioned Patent Document 2, dripping can be prevented only at a portion where the temperature sensor is in contact, and a sufficient cooling effect cannot be obtained.
Therefore, the development of a stator capable of suppressing the dripping of the refrigerant and obtaining a sufficient cooling effect has been conventionally desired.

  Then, this invention is invention which was created in view of the above-mentioned background, Comprising: It aims at providing the stator of the rotary electric machine which can suppress dripping of the refrigerant | coolant supplied to the coil end.

  As a means for solving the above-mentioned problems, a stator of a rotating electrical machine according to the present invention is a stator of a rotating electrical machine that supplies a refrigerant from above in a vertical direction to a coil end with an axis line indicating a horizontal direction, and a plurality of stators A stator core formed by joining a plurality of segment conductor type coils inserted into the slot, and the stator coil protrudes outward in the axial direction from an end surface of the stator core. The folded portion has a pair of inclined portions, and the plurality of inclined portions constitute the coil end, are located vertically above the axis, and are adjacent to each other in the circumferential direction. The gap between the two inclined portions is smaller on the inner circumferential side than on the outer circumferential side, and is located on the lower side in the vertical direction than the axis, and is adjacent to the circumferential direction. One gap between the inclined portion of the is characterized in that towards the inner circumferential side of the outer peripheral side of the gap than the gap is small.

According to the invention, when the refrigerant moves between the inclined portions located on the upper side in the vertical direction with respect to the axis, since the gap between the lower (inner peripheral side) inclined portions is small, the dripping is suppressed.
Further, when the refrigerant moves between the inclined portions located on the lower side in the vertical direction with respect to the axis, since the gap between the lower (outer peripheral side) inclined portions is small, the dripping is suppressed.
From the above, the refrigerant moves sequentially toward the inclined portion on the lower side in the circumferential direction, and the entire coil end is cooled.

Further, in the invention, the inclined portion positioned on the upper side in the vertical direction with respect to the axis is smaller in angle on the inner peripheral side than in the outer peripheral side with respect to the end surface of the stator core, and is lower in the vertical direction than the axis. The inclined portion that is positioned may be configured such that the angle formed with the end face of the stator core is smaller on the outer peripheral side than on the inner peripheral side.
Or in the said invention, the said inclination part located in the vertical direction upper side from the said axis line has a coil width larger on the inner peripheral side than an outer peripheral side, and the said inclination part located in the vertical direction lower side than the said axis line The coil width may be larger on the outer peripheral side than on the inner peripheral side.

  According to the said structure, the clearance gap between two inclined parts can be set easily.

  When the coil width is reduced, a space is formed between the stator coil and the teeth, the occupation rate of the stator core between the teeth is reduced, and the magnetic field strength is weakened.

  Therefore, in order to solve the above-mentioned problem, in the present invention, the slot of the stator core positioned vertically above the axis has a slot width larger on the inner periphery than on the outer periphery, and vertical on the axis. The slot of the stator core located on the lower side in the direction preferably has a larger slot width on the outer peripheral side than on the inner peripheral side.

  According to the said structure, it can suppress that the occupation rate of the stator core between teeth falls, ie, a magnetic field intensity becomes weak.

By the way, since the gap between the inclined portions located in the vicinity of the axis points in the horizontal direction, normally, the refrigerant that moves due to its own weight is unlikely to sag from the gap between the inclined portions.
However, for example, when a rotating electric machine is mounted on a vehicle and an inertial force in the front-rear direction or the left-right direction is applied to the refrigerant by driving the vehicle, the refrigerant may droop from a gap between inclined portions located near the axis. There is.

  Therefore, in order to solve the above problem, in the present invention, the gap between the inclined portions located at the same height as the vicinity of the axis is a gap on the outer peripheral side and a gap on the inner peripheral side with respect to the gap in the radial intermediate portion. Is preferably smaller.

  According to the said structure, even if the inertia force to the front-back direction acts on a refrigerant | coolant, it can suppress that a refrigerant | coolant droops from the clearance gap between the inclination parts located in the axis line vicinity.

  ADVANTAGE OF THE INVENTION According to this invention, the stator of the rotary electric machine which can suppress the dripping of the refrigerant | coolant from a coil end can be provided.

It is the perspective view which extracted only the stator from the electric motor (rotary electric machine) of embodiment. It is the front view which looked at the stator core from the front. It is the enlarged view to which a part of stator core was expanded. It is a figure which shows the joining relationship of the coils inserted in the slot. (A) It is an enlarged view of the 1st coil assembled | attached to the slot, (b) It is an enlarged view of the 2nd coil assembled | attached to the slot. It is the figure which assembled | attached the 1st coil and the 2nd coil to the same slot, and was seen from the 1st coil side. It is an enlarged view of the 3rd coil of the 1st modification. (A) It is the figure which expanded the slot above the stator core of a 1st modification, (b) The figure which expanded the slot below the stator core of a 1st modification. It is a figure which shows the arrangement | positioning location of the 1st coil and 2nd coil in a 2nd modification.

  Next, an electric motor (rotating electric machine) to which the stator of this embodiment is applied will be described.

(Electric motor)
The electric motor 100 is for converting electric energy into rotational movement of a rotating shaft (not shown).
As shown in FIG. 1, the electric motor 100 includes a cylindrical stator 1 that opens in the front-rear direction, a cylindrical rotor (not shown) disposed in the stator 1, a rotor that passes through the rotor, and is rotatable about an axis O. A rotating shaft (not shown) and a housing (not shown) for housing them.
In addition, three refrigerant supply pipes 110 are provided in the housing.
The refrigerant supply pipe 110 is for dripping the refrigerant from the upper side in the vertical direction of the coil end 4 described later (see the arrow in FIG. 1).

(Stator)
The stator 1 is for generating a rotating magnetic field that rotates the rotor, and includes a substantially cylindrical stator core 2 and a stator coil 3 wound around the stator core 2.
Further, a part of the stator coil 3 projects forward from the front end face 2 a of the stator core 2 to constitute a ring-shaped front coil end 5.
Further, a part of the stator coil 3 protrudes rearward from the rear end surface 2 b of the stator core 2 to constitute a ring-shaped rear coil end 6.
Next, each configuration of the stator 1 will be described in the order of the basic configuration and the specific configuration.

(Stator core 2)
As shown in FIG. 2, the stator core 2 includes a cylindrical core body 20 centering on the axis O, and a plurality of core cores 20 that protrude radially inward from the core body 20 and are arranged at a predetermined distance in the circumferential direction. Teeth 21.
Therefore, a slot 22 extending in the front-rear direction is formed between the teeth 21, 21 adjacent in the circumferential direction.

As shown in FIG. 3, the slot 22 is a space for accommodating leg portions (first leg portion 31 and second leg portion 32) of a segment conductor type coil 30 described later.
The slot 22 has a rectangular shape that is long in the radial direction when viewed from the axial direction, and can accommodate four legs arranged in the radial direction.
In other words, the slot 22 includes a first slot 23, a second slot 24, a third slot 25, and a fourth slot 26 as a space for accommodating the legs in order from the radially inner side.

(Stator coil)
Stator coil 3 includes a U-phase stator coil, a V-phase stator coil, and a W-phase stator coil.
Each of the U-phase stator coil, the V-phase stator coil, and the W-phase stator coil is composed of a plurality of segment conductor type coils 30 (hereinafter simply referred to as “coils 30”).

  As shown in FIG. 4, the coil 30 has a substantially U shape before being assembled to the stator core 2, and includes a first leg portion 31 and a second leg portion 32 (two-dot chain lines L31 and L32 extending linearly). Reference) and a rear folded portion 33 that connects the first leg portion 31 and the second leg portion 32.

The assembly of the coil 30 is as follows.
First, the first leg portion 31 and the second leg portion 32 of each coil 30 are inserted into the corresponding slots 22 and 22 from the rear of the stator core 2.

Here, a part of the plurality of coils 30 is inserted into the inner peripheral side (first slot 23, second slot 24) of the stator core 2, and the other part is connected to the inner peripheral side (third slot 25, It is inserted into the fourth slot 26).
That is, in some of the plurality of coils 30, the first leg 31 is inserted into the first slot 23 and the second leg 32 is inserted into the second slot 24 (the range surrounded by the broken line S <b> 7 in FIG. 2). reference).
The other portions of the plurality of coils 30 are such that the first leg 31 is inserted into the third slot 25 and the second leg 32 is inserted into the fourth slot 26 (the range surrounded by the broken line S8 in FIG. 2). reference).

  Next, the 1st front-end | tip part 31a (refer to the dashed-two dotted line L31) of the 1st leg part 31 which protrudes ahead rather than the front-end surface 2a of the stator core 2 and the 2nd front-end | tip part 32a of the 2nd leg part 32 (two-dot chain line L32). Are folded so that they open to the outside in the circumferential direction.

Next, the 1st tip part 31a is joined to the 2nd tip part 32a of other coils 30 by welding.
Thereby, each coil 30 arrange | positioned at the inner peripheral side of the stator core 2 connects, and an inner peripheral side stator coil is formed.
Moreover, each coil 30 arrange | positioned at the outer peripheral side of the stator core 2 connects, and an outer peripheral side stator coil is formed.

  Next, although not particularly illustrated, the inner peripheral side stator coil and the outer peripheral side stator coil are connected in parallel by a bus bar to form the stator coil 3.

According to the above, the first tip portion 31 a and the second tip portion 32 a constitute the front folded portion 34 of the stator core 2. Furthermore, each front side folding | returning part 34 is located in a line with the circumferential direction on the front end surface 2a of the stator coil 3, and comprises the ring-shaped front side coil end 5. FIG.
On the other hand, the rear folded portion 33 of each coil 30 is arranged in the circumferential direction on the rear end surface 2 b of the stator coil 3 and constitutes the ring-shaped rear coil end 6.

  Hereinafter, the front coil end 5 and the rear coil end 6 are collectively referred to as a coil end 4. In addition, the front folded portion 34 and the rear folded portion 33 are collectively referred to as a folded portion.

  Further, the coil end 4 includes an inner coil end 7 (see FIGS. 1 to 3) configured by an inner stator coil and an outer coil end 8 (FIGS. 1 to 3) configured by an outer stator coil. 3).

  As shown in FIG. 4, the folded-back portion has a substantially central shape in the circumferential direction protruding outward in the front-rear direction (outside in the axial direction) and has a substantially V shape. Moreover, the folding | returning part is formed symmetrically when it cuts in the circumferential center part. That is, the folded portion (the front folded portion 34, the rear folded portion 33) is composed of a pair of inclined portions 10, 10 that are inclined with respect to the end surface of the stator core 2.

  The above is the basic configuration of the stator 1. Next, a specific configuration of the stator 1 will be described.

Two types of coils 30 (a first coil 41 and a second coil 42) are used for the coil 30 of the present embodiment.
As shown in FIG. 5, the difference between the first coil 41 and the second coil 42 is that the angle between the inclined portion 10 and the end surfaces (front end surface 2a, rear end surface 2b) of the stator core 2 (hereinafter referred to as an inclination angle). It is. The coil width L1 of the first coil 41 and the coil width L2 of the second coil 42 are the same.

As shown in FIG. 5A, the inclination angle of the first inclined portion 41a of the first coil 41 is set to θ1.
On the other hand, as shown in FIG. 5B, the inclination angle of the second inclined portion 42a of the second coil 42 is set to θ2, which is larger than the inclination angle θ1 of the first inclined portion 41a.
For this reason, as shown to Fig.5 (a), when the 1st coil 41 is arrange | positioned continuously in the circumferential direction, the clearance gap between the 1st inclination parts 41a becomes S1.
On the other hand, as shown in FIG. 5B, when the second coil 42 is continuously arranged in the circumferential direction, the gap between the second inclined portions 42a is S2, which is narrower than the gap S1.

From the above, when the coil end 4 is configured by the first inclined portion 41a of the first coil 41, the gap S1 of the first inclined portion 41a is relatively large. Therefore, when the lubricating oil moves in the circumferential direction along the plurality of first inclined portions 41a (see arrow A in FIG. 5A), the lubricating oil tends to sag from the gap S1.
On the other hand, when the coil end 4 is composed of the second inclined portion 42a of the second coil 42, the gap S2 of the second inclined portion 42a is relatively small. Therefore, when the lubricating oil moves in the circumferential direction along the plurality of second inclined portions 42a (see arrow B in FIG. 5B), it is difficult for the lubricating oil to sag from the gap S2.

Further, as shown in FIG. 6, the amount of protrusion of the coil 30 (the amount of protrusion outward in the axial direction) is greater in the first coil 41 (see the broken line L41) than in the second coil 42 (see the broken line L42). .
In addition, since the first inclined portion 41a and the second inclined portion 42a have different inclination angles, when the first coil 41 and the second coil 42 are inserted into the same slot 22, the first inclined portion 41a has a gap S1. 2 A part of the inclined portion 42a (see the area painted with dots in FIG. 6) is exposed.

  The arrangement of the first coil 41 and the second coil 42 with respect to the stator core 2 is as follows.

As shown in FIG. 2, in the slot 22 positioned vertically above the axis O, the leg portions (the first leg portion 31, the first leg portion 31, the second leg portion 24) are arranged on the inner peripheral side (first slot 23, second slot 24). The second leg portion 32) is inserted (see the range surrounded by the broken line S7a in FIG. 2).
On the other hand, in the slot 22 positioned vertically below the axis O, the legs of the first coil 41 (the first leg 31 and the second leg) are arranged on the inner peripheral side (the first slot 23 and the second slot 24). Leg 32) is inserted (see the range surrounded by broken line S7b in FIG. 2).
Therefore, the upper side of the inner peripheral side coil end 7 is constituted by the second coil 42, and the lower side of the inner peripheral side coil end 7 is constituted by the first coil 41.

Further, in the slot 22 positioned on the upper side in the vertical direction from the axis O, the leg portions of the first coil 41 (the first leg portion 31 and the second leg portion 32) are arranged on the outer peripheral side (the third slot 25 and the fourth slot 26). Is inserted (see the range surrounded by the broken line S8a in FIG. 2).
On the other hand, in the slot 22 positioned below the axis O in the vertical direction, the leg portions of the second coil 42 (the first leg portion 31 and the second leg portion) are arranged on the outer peripheral side (the third slot 25 and the fourth slot 26). Part 32) is inserted (see the range surrounded by the broken line S8b in FIG. 2).
For this reason, the upper side of the outer peripheral side coil end 8 is constituted by the first coil 41, and the lower side of the inner peripheral side coil end 7 is constituted by the second coil 42.

Next, the case where the refrigerant is supplied to the coil end 4 will be described.
As shown in FIG. 2, when the refrigerant is dripped from the refrigerant supply pipe 110, a part of the refrigerant adheres to the plurality of first inclined portions 41a constituting the upper side of the outer peripheral coil end 8 (see the broken line S8a in FIG. 2). To do.

Further, since the gap S1 between the first inclined portions 41a constituting the upper side of the outer peripheral coil end 8 is relatively large (see FIG. 5A), a part of the dropped refrigerant passes through the gap S1.
And the refrigerant | coolant which passed clearance gap S1 adheres to the some 2nd inclination part 42a which comprises the upper side (refer broken line S7a of FIG. 2) of the inner peripheral side coil end 7 (refer arrow D1 of FIG. 2).
In the second inclined portion 42a, a portion to which the dropped refrigerant adheres is a portion exposed from the gap S1 (see a portion painted with dots in FIG. 6).

Moreover, the refrigerant | coolant adhering to the several 2nd inclination part 42a in the inner peripheral side coil end 7 moves toward the circumferential direction lower side with dead weight.
Here, as described above, the gap S2 between the second inclined portions 42a is relatively small and is unlikely to sag. Therefore, the refrigerant moves downward in the circumferential direction along the second inclined portions 42 a arranged in the circumferential direction (see arrow D <b> 2 in FIG. 2), and is supplied to the inclined portion 10 constituting the lower side of the coil end 4.

Moreover, the refrigerant | coolant supplied to the lower part side of the coil end 4 moves to the lower side (outer peripheral side) of the coil end 4 with dead weight.
Here, the lower side of the outer coil end 8 (see the broken line S8b in FIG. 2) is configured by the second inclined portion 42a having a relatively small gap S2, so that the refrigerant flows along each second inclined portion 42a. Further, it moves downward in the circumferential direction (see arrow D3 in FIG. 2).

  As described above, according to the embodiment, the refrigerant moving downward in the circumferential direction along the shape of the coil end 4 is unlikely to sag from between the inclined portions 10 (second inclined portions 42a), so that the entire stator coil 3 is efficiently cooled. Is done.

  Moreover, according to the embodiment, the gap between the inclined portions 10 can be easily set by the two types of coils 30 (the first coil 41 and the second coil 42).

Although the embodiments have been described above, the present invention is not limited to the examples shown in the embodiments.
For example, in the embodiment, in order to set the gap between the inclined portions 10, two coils 30 (first coil 41 and second coil 42) having different inclination angles θ of the inclined portion 10 are used. May use two coils 30 (second coil 42 and third coil 43) having different coil widths.
Hereinafter, a modified example using the third coil 43 instead of the first coil 41 will be described.

As shown in FIG. 7, the coil width L3 of the third coil 43 is smaller than the coil width L2 of the second coil 42.
Therefore, when the third coil 43 is continuously arranged in the circumferential direction, the gap S3 between the third inclined parts 43a is wider than the gap S2 between the second inclined parts 42a.
That is, when the coil end 4 is configured by the third inclined portion 43a of the third coil 43, the lubricating oil that moves in the circumferential direction tends to droop from the gap S3.
The inclination angle θ3 of the third inclined portion 43a is the same as the inclination angle θ2 of the second inclined portion 42a.

  Further, since the third inclined portion 43a of the third coil 43 is formed narrow, when the second coil 42 and the third coil 43 are inserted into the same slot 22, the gap S3 between the third coils 43 is obtained. Thus, a part of the second inclined portion 42a is exposed.

The arrangement of the third coil 43 with respect to the stator core 2 is the same as that of the first coil 41 of the embodiment.
That is, as shown in FIG. 2, in the slot 22 positioned vertically above the axis O, the leg portion of the third coil 43 (the first leg portion 31, the first leg portion 31) Two legs 32) are inserted.
On the other hand, in the slot 22 positioned below the axis O in the vertical direction, the leg portions (first leg portion 31 and second leg portion) of the third coil 43 are arranged on the inner peripheral side (see the broken line S7b in FIG. 2). 32) is inserted.

  Even in the above modified example, when the refrigerant is dropped from the refrigerant supply pipe 110, a part of the refrigerant passes through the gaps S3 of the third inclined portions 43a constituting the upper side of the outer peripheral coil end 8. Therefore, the refrigerant is supplied to the plurality of second inclined portions 42a constituting the upper side of the inner peripheral coil end 7 (see arrow D1 in FIG. 2).

  Moreover, the upper side of the inner peripheral side coil end 7 and the lower side of the outer peripheral side coil end 8 are configured by the second inclined portion 42a, and it is difficult for the refrigerant to drip from the gap S2. For this reason, it moves to the lower side in the circumferential direction along the second inclined portions 42a arranged in the circumferential direction (see arrows D2 and D3 in FIG. 2), and the entire coil end 4 is cooled.

  In the modification described above, it is preferable that the width of the slot 22 corresponds to two coil widths as shown in FIG.

More specifically, the slot width of the first slot 23A and the second slot 24A of the slot 22A positioned vertically above the axis O is set to correspond to the second coil 42, and the third slot 25A and the fourth slot. It is preferable to form larger than 26A.
On the other hand, the slot widths of the third slot 25B and the fourth slot 26B of the slot 22B positioned vertically below the axis O are set so as to correspond to the second coil 42 from the first slot 23B and the second slot 24B. It is preferable to form a large film.

  According to this, the space (space) between the coil 30 and the teeth 21 is narrowed, and a decrease in the occupation ratio of the stator coil 3 between the teeth 21 and 21 can be suppressed. Therefore, it is avoided that the magnetic field intensity generated by the stator coil 3 is weakened.

Next, a second modification will be described.
As shown in FIG. 9, the second modified example is formed so that six legs can be inserted into the slot 22, and the outer peripheral side and inner peripheral side of the slot 22 having the same height as the vicinity of the axis O (in FIG. 9). The leg portion of the second coil 42 is inserted into the range surrounded by the broken lines S9a and S9c).
Further, the leg portion of the first coil 41 is inserted into the radial intermediate portion of the slot 22 having the same height as the vicinity of the axis O (see the range surrounded by the broken line S9b in FIG. 9).

  According to the second modified example, the gap S2 between the second inclined portion 42a constituting the inner peripheral side (left side) and the outer peripheral side (right side) of the coil end 4 is the first inclined portion 41a constituting the radial intermediate portion. Is smaller than the gap S1. Therefore, even when the electric motor 100 is mounted on the vehicle and an inertial force acting to the left and right acts on the refrigerant, it is difficult for the electric motor 100 to drip from the gap S2 of the second inclined portion 42a. For this reason, the refrigerant can be reliably supplied to the lower side of the coil end 4.

1 Stator 2 Stator Core 3 Stator Coil 4 (5, 6) Coil End (Front Coil End, Rear Coil End)
7 Inner peripheral side coil end 8 Outer peripheral side coil end 10 Inclined portion 21 Teeth 22, 22A, 22B Slot 30 Segment conductor type coil (coil)
33 Rear folded portion 34 Front folded portion 41a First inclined portion 42a Second inclined portion 43a Third inclined portion 100 Electric motor (rotary electric machine)

Claims (5)

A stator of a rotating electrical machine that supplies a refrigerant from above in the vertical direction with respect to the coil end, with the axis pointing in the horizontal direction,
A stator core formed with a plurality of slots;
A stator coil formed by joining a plurality of segment conductor type coils inserted into the slot;
With
The stator coil has a plurality of folded portions protruding axially outward from the end face of the stator core,
The folded portion has a pair of inclined portions
The plurality of inclined portions constitute the coil end,
The gap between the two inclined portions located in the vertical direction above the axis and adjacent in the circumferential direction is smaller in the gap on the inner circumferential side than the gap on the outer circumferential side,
A stator for a rotating electrical machine characterized in that a gap between two inclined portions adjacent to each other in the circumferential direction, which is positioned vertically below the axis, is smaller in the outer circumferential side than in the inner circumferential side. . The inclined portion located on the upper side in the vertical direction from the axis is smaller in angle on the inner peripheral side than in the outer peripheral side with respect to the end surface of the stator core,
2. The stator of a rotating electrical machine according to claim 1, wherein the inclined portion positioned vertically below the axis has an angle formed with an end surface of the stator core that is smaller on the outer peripheral side than on the inner peripheral side. . The inclined portion located on the upper side in the vertical direction from the axis is such that the coil width is larger on the inner peripheral side than on the outer peripheral side,
The stator of the rotating electrical machine according to claim 2, wherein the inclined portion located vertically below the axis has a coil width larger on the outer peripheral side than on the inner peripheral side. The slot of the stator core positioned vertically above the axis is such that the slot width is larger on the inner peripheral side than on the outer peripheral side,
4. The stator of a rotating electrical machine according to claim 3, wherein the slot of the stator core positioned vertically below the axis has a slot width larger on the outer peripheral side than on the inner peripheral side.   2. The gap between the inclined portions positioned at the same height as the vicinity of the axis is smaller in the outer circumferential side gap and the inner circumferential side gap than in the radial intermediate portion. Item 5. The stator for a rotating electrical machine according to any one of items 4 to 4.

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