JP2015119535A - Rotary electric machine stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a space for bonding and an insulation distance between neighboring bonding parts without enlarging a coil end in a rotary electric machine stator.SOLUTION: A rotary electric machine stator 10 includes a stator core 12 and a stator coil 11 wound around the stator core 12. In a plurality of bonding parts 40, 42, 44 and 46 formed by bonding the conductor segments neighboring to each other regarding a plurality of conductor segments 28, 30, 32, 34 and 36 inserted over two predetermined slots, axial heights of the bonding parts adjacently disposed in a radial direction of the stator core 12 are different from each other, and the bonding part with a higher axial height and the bonding part with a lower axial height are alternately disposed in the radial direction. The plurality of bonding parts can also be disposed in such a manner that the circumferential positions of bonding parts adjacently disposed in the radial direction of the stator core 12 become different from each other.

Description

  The present invention relates to a rotating electrical machine stator, and more particularly, to a rotating electrical machine stator in which a coil is wound using a conductor segment.

  When forming a stator coil using a plurality of U-shaped conductor segments having two parallel legs on a rotating electric machine stator, each conductor segment is inserted into a slot of the stator core, and the two legs protruding from the stator core are Each of them is inclined in the circumferential direction and bent in opposite directions. Further, a portion on the tip side is bent in the axial direction, and predetermined conductor segments are joined to each other at the bent portion in the axial direction.

  In the rotating electrical machine stator of Patent Document 1, the first bending inclined in the circumferential direction is performed so that the insulating film portion of the one leg portion and the insulating film portion of the other leg portion of each conductor segment do not excessively contact each other. It is disclosed that the position in the axial direction of the second bending portion that is bent in the axial direction on the tip side of the portion is different between the leg portion on one side and the leg portion on the other side.

  In patent document 2, in order to improve the cooling property of the stator winding | coil of the vehicle alternating current generator formed using a conductor segment, at least 1 is more than a joining position among several junction parts in a coil end. Furthermore, it has been disclosed to have a portion extending in the axial direction and to use it as a radiation fin.

JP2012-200101A JP 2006-304436 A

  In the coil end of the stator, a joining space is required when joining the leading ends of the opposing conductor segments. Moreover, a required insulation distance is required between adjacent joints. If an appropriate gap is provided between the adjacent joints in order to secure the joining space and the insulation distance, the coil end becomes large and the rotating electrical machine becomes large.

  An object of the present invention is to provide a rotating electrical machine stator that can secure a joining space and an insulation distance between adjacent joining portions without enlarging a coil end.

  A rotating electrical machine stator according to the present invention includes an annular stator core having a plurality of slots arranged along an inner circumferential direction, and a plurality of conductors inserted across two predetermined slots separated by a predetermined slot interval. And a stator coil wound around the stator core while sequentially joining the tip ends of the conductor segments to each other at the axial end of the stator core to form a joint, and inserted across two predetermined slots The plurality of joints formed by joining adjacent conductor segments with respect to the plurality of conductor segments formed are different from each other in the axial height of the joints arranged adjacent to each other in the radial direction of the stator core. It is characterized in that joints having a high height and joints having a low axial height are alternately arranged along the radial direction.

  A rotating electrical machine stator according to the present invention includes an annular stator core having a plurality of slots arranged along an inner circumferential direction, and a plurality of conductors inserted across two predetermined slots separated by a predetermined slot interval. And a stator coil wound around the stator core while sequentially joining the tip ends of the conductor segments to each other at the axial end of the stator core to form a joint, and inserted across two predetermined slots The plurality of joint portions formed by joining adjacent conductor segments with respect to the plurality of conductor segments to be formed are different from each other in the positions along the circumferential direction of the joint portions arranged adjacent to each other in the radial direction of the stator core. Features.

  According to the rotating electrical machine stator according to the present invention, the joints arranged adjacent to each other in the radial direction of the stator core have different axial heights, and the joints having a high axial height and the joints having a low axial height. Are alternately arranged along the radial direction. Thereby, the magnitude | size of the radial direction of a coil end can be suppressed, ensuring the space for insulation and insulation distance between adjacent junction parts.

  According to the rotating electrical machine stator according to the present invention, since the positions along the circumferential direction of the joint portions arranged adjacent to each other in the radial direction of the stator core are different from each other, the joint space and the insulation are separated between the adjacent joint portions. The radial size of the coil end can be suppressed while securing the distance.

In the rotary electric machine stator of embodiment which concerns on this invention, it is a figure which shows the stator coil for one phase. It is a figure which shows the procedure which forms the stator coil of FIG. (A) is a figure which shows a conductor segment, (b) is a figure which shows the conductor segment inserted in the slot, (c) is a figure which shows joining of the front-end | tip part of a conductor segment. It is a figure which shows the winding ranging between the slots of the stator coil of FIG. It is a figure which shows the effect of the structure of FIG. It is a figure which shows the position of the connection part of the radial direction in a prior art for comparing with FIG. In the rotary electric machine stator of other embodiment, it is a figure which shows the stator coil for one phase. FIG. 6 is a diagram corresponding to FIG. 2. FIG. 6 is a diagram corresponding to FIG. 3. (A) is a figure which shows the position along the circumferential direction of the junction part in a prior art for comparison, (b) is a figure which shows the effect of the structure of FIG.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Hereinafter, distributed winding will be described as a winding method of the rotating electrical machine, but this is an example for explanation, and any winding method other than distributed winding may be used as long as the winding method joins two tip portions. The dimensions, shapes, materials, and the like described below are examples for explanation, and can be appropriately changed according to the specifications of the rotating electrical machine. Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a view showing a rotating electrical machine stator 10. Hereinafter, the rotating electrical machine stator 10 is simply referred to as a stator 10. The rotating electrical machine in which the stator 10 is used is a three-phase synchronous rotating electrical machine that is a motor generator that functions as an electric motor when the vehicle is powered and functions as a generator when the vehicle is braking. The rotating electrical machine includes a stator 10 shown in FIG. 1 and a rotor that is disposed on the inner peripheral side of the stator 10 with a predetermined gap therebetween. FIG. 1 shows the circumferential direction θ, the radial direction R, and the axial direction Z of the stator 10.

  The stator 10 includes a stator core 12 and a stator coil 11 wound around the stator core 12.

  The stator core 12 is an annular magnetic part and has a plurality of slots 20 and 22 arranged along the inner circumferential direction. The stator core 12 is formed by laminating a plurality of annular magnetic thin plates 13 (see FIG. 2A) formed into a predetermined shape including the slots 20 and 22. An electromagnetic steel plate can be used as the magnetic thin plate. Instead of the laminated body of magnetic thin plates, a magnetic powder integrally formed into a predetermined shape can be used.

  A three-phase stator coil 11 is wound around the stator core 12 by a predetermined distributed winding method. The three-phase stator coils are a U-phase coil, a V-phase coil, and a W-phase coil. Each phase coil in the distributed winding is a plurality of slots provided along the circumferential direction on the inner peripheral side of the stator core 12 and is between two slots separated by a predetermined slot interval determined by the distributed winding type winding method. It is wound over. In FIG. 1, U is attached to the slot around which the U-phase coil is wound, V is attached to the slot around which the V-phase coil is wound, and W is attached to the slot around which the W-phase coil is wound. Indicated.

In the example of FIG. 1, a plurality of slots are provided so as to be in the same phase with an interval of 6 slots. 6 slot interval is a predetermined slot interval D _S. As described above, each phase coil differs in the position of the slot to be wound, but the other contents are almost the same. Therefore, the U-phase coil 11 will be described below as shown in FIG. Hereinafter, U-phase coil 11 is simply referred to as coil 11.

  The coil 11 has a plurality of conductor segments 28, 30, 32, 34, 36 inserted across the slots 20, 22 from one end 14 of the stator core 12 and protrudes to the other end 16 of the stator core 12. The leading end portions of the conductor segments 28, 30, 32, 34, and 36 are sequentially joined according to a predetermined coil winding method to form the joint portions 40, 42, 44, and 46, thereby obtaining a predetermined number of turns. Here, the number of turns of the coil 11 is set to 4. The number of turns = 4 is an example, and other number of turns may be used. The conductor segments 28, 30, 32, 34, and 36 will be described later with reference to FIG.

  The joint portions 40, 42, 44, 46 formed by joining adjacent conductor segments 28, 30, 32, 34, 36 inserted across the two slots 20, 22 are formed on the stator core 12. The axial heights of the joint portions arranged adjacent to each other in the radial direction R are different from each other, and the joint portions 40 and 44 having a high axial height and the joint portions 42 and 46 having a low axial height are in the radial direction R. Are arranged alternately.

  In the example of FIG. 1, the conductor segment 28, the conductor segment 30, the conductor segment 32, the conductor segment 34, and the conductor segment 36 are arranged in this order from the inner diameter side to the outer periphery side in the radial direction R. The conductor segments arranged adjacent to each other with respect to the conductor segments 28, 30, 32, 34, 36 are joined to form joints 40, 42, 44, 46.

  That is, the conductor segment 28 and the conductor segment 30 that are arranged adjacent to each other are joined together to form the joined portion 40. Similarly, the conductor segment 30 and the conductor segment 32 are joined to form a joined portion 42, the conductor segment 32 and the conductor segment 34 are joined to form a joined portion 44, and the conductor segment 34 and the conductor segment 36 are joined to each other. The bonded portion 46 is formed by bonding.

Here, with reference to the end 16 on the other side of the stator core 12, if the height of the joints 42 and 46 is H ₁ and the height of the joints 40 and 44 is H ₂ , then H ₁ <H _2. As described above, the joint portions 40, 42, 44, and 46 are formed. As described above, the joint portions 40 and 44 having a high axial height and the joint portions 42 and 46 having a low axial height are alternately arranged along the radial direction R. Thereby, between the adjacent joint parts 40 and 42, between the joint parts 42 and 44, and between the joint parts 44 and 46, while ensuring the space for a joint and the insulation distance, respectively, it is the radial direction R of a coil end. The size can be suppressed. Here, the coil end is a portion where the coil 11 protrudes at the end 14 on one side and the end 16 on the other side of the stator core 12.

  FIG. 2 is a diagram showing a procedure for forming the coil 11 of FIG. As shown in FIG. 1, the joints 40, 46 are between the conductor segments 28, 36 extending from each of the slots 20, 22 and extending from another slot spaced by 6 slots on the opposite side in the circumferential direction θ. Formed with. The joint portions 42 and 44 are formed between the conductor segments 30, 32, and 34 straddling the slots 20 and 22. Therefore, in FIG. 2, a procedure for forming the joint portions 42 and 44 between the conductor segments 30, 32 and 34 straddling the slots 20 and 22 will be described.

FIG. 2A shows the conductor segments 30, 32, and 34. Each of the conductor segments 30, 32, and 34 is formed by forming a single conductor wire with an insulating film into a substantially U shape. The substantially U-shape is a shape having two leg portions that extend straight and a bent portion that connects the two leg portions while being separated so as to have a predetermined leg interval. Predetermined leg spacing of the conductor segments 30, 32, 34 is set tuned to a predetermined slot interval D _S.

  As a conductor wire with an insulating film used for the conductor segments 30, 32, and 34, a rectangular wire having a rectangular cross section is used. By using the flat wire, the coil space factor in the slots 20 and 22 can be improved. Instead of a flat wire, one having a circular or elliptical cross section may be used. The conductive wire with an insulating film is obtained by coating an outer periphery of a strand with an insulating film. As an element wire, a copper wire, a copper tin alloy wire, a silver plating copper tin alloy wire, etc. can be used. As the insulating film, a polyamide-imide enamel film is used. Instead of this, polyesterimide, polyimide, polyester, formal or the like may be used.

  As shown in FIG. 2A, each of the conductor segments 30, 32, and 34 is different in the length of one leg of the two legs and the length of the other leg. Although not shown in FIG. 2A, the lengths of the leg portions on one side of the two leg portions and the lengths of the leg portions on the other side are also different in the conductor segments 28 and 36. Furthermore, the conductor segments 30 and 34 and the conductor segment 32 are different in the length of the leg portion inserted into the slot 20 and the length of the leg portion inserted into the slot 22. That is, in the conductor segments 30 and 34, the longer leg of the two legs is inserted into the slot 22, and the shorter leg is inserted into the slot 20. On the other hand, in the conductor segment 32, the longer leg of the two legs is inserted into the slot 20, and the shorter leg is inserted into the slot 22.

  FIG. 2B shows the conductor segments 30, 32, and 34 inserted in the slots 20 and 22, respectively. The conductor segments 30, 32, and 34 are inserted into the slots 20 and 22, respectively, from the one end portion 14 of the stator core 12 toward the other end portion 16. The bent portions of the conductor segments 30, 32, and 34 protrude from the end portion 14 on one side of the stator core 12, and the leg portions of the conductor segments 30, 32, and 34 protrude from the end portion 16 on the other side. , Each forming a coil end.

  FIG. 2 (c) is a diagram showing the joining of the tip portions of the conductor segments 30, 32, 34. Here, in each of the conductor segments 30, 32, and 34, the two leg portions protruding from the end portion 16 on the other side of the stator core 12 are each inclined in the circumferential direction and bent in opposite directions, and further, a portion on the tip side thereof. Are bent in the axial direction, and predetermined conductor segments are joined to each other at a portion bent in the axial direction.

Here, the shorter leg portion protruding from the slot 20 in the conductor segment 30 and the shorter leg portion protruding from the slot 22 in the conductor segment 32 are joined to form the joint portion 42. In addition, the longer leg portion protruding from the slot 20 in the conductor segment 32 and the longer leg portion protruding from the slot 22 in the conductor segment 34 are joined to form a joint portion 44. Due to the difference in length of the leg portions, the height H ₁ of the joint portion 42 is lower than the height H ₂ of the joint portion 44. That is, H ₁ <H ₂ .

Although the description is omitted in FIG. 2, the longer leg of the conductor segment 28 is inserted into the slot 20, and the longer leg of the conductor segment 30 is inserted into the slot 22. Becomes the height H ₂ . Further, since the shorter leg portion of the conductor segment 34 is inserted into the slot 20 and the shorter leg portion of the conductor segment 36 is inserted into the slot 22, the height of the joint portion 46 in FIG. 1 is H _1. . In this manner, the joint portions 40 and 44 having a high axial height and the joint portions 42 and 46 having a low axial height are formed so as to be alternately arranged along the radial direction R.

FIG. 3 is a top view of the stator core 12 as viewed from the other end 16. In the stator core 12, four slots 20, 22, 24, 26 that are separated by a predetermined slot distance D _S are slots 20, 22, 24, 26. The winding of each conductor segment spanning 26 is shown. Here, winding from the slot 20 to the slot 26 is shown. The winding direction is for explanation, and may be reversed.

Here, in each of the slots 20, 22, 24, and 26, a mark with a black dot in a circle indicates that the conductor segment is directed from the one end 14 side of the stator core 12 to the other end 14 side. A mark with a cross in the circle indicates that the conductor segment is wound in a direction from the other end 16 side of the stator core 12 toward the one end 16 side. It shows that. Further, for each joint, showing the joint portion of the axial height is H ₂ by open circles, the joint axial height is H ₁ by a black circle.

For example, winding is performed between the slots 20 and 22 as follows. That is, the conductor segment 28 is bent from one end 14 side of the slot 20 to the other end 16, bent from the other end 16 to the slot 22, and is joined to the end of the conductor segment 30 at the joint 40. To be joined. The axial height of the joint portion 40 is H _2. The conductor segment 30 extends from the joint portion 40 toward the slot 22 and passes through the end portion 14 on one side of the stator core 12 in the slot 22. It is bent from the end 14 on one side to the slot 20 side, and goes out to the end 16 on the other side in the slot 20. The other end 16 is bent toward the slot 22, and is joined to the end of the conductor segment 32 at the joint 42. The axial height of the joint 42 is H ₁ .

  This is repeated, and the joints 40 and 44 having a high axial height and the joints 42 and 46 having a low axial height are alternately formed along the radial direction R. 4, the coil 11 is wound. From the joint 46, the conductor segment 36 faces the slot 22, and then from the other end 16 side to the one end 14 in the slot 22, and at the one end 14 of the slot 22, the conductor segment 34. , 36, and from there to the other end 14, the winding between the slots 22, 24 is performed thereafter.

  In this way, joints having a high axial height indicated by white circles and joints having a low axial height indicated by black circles are alternately formed along the radial direction R, so that the entire circumference of the stator core 12 is The coil 11 is wound over.

  FIG. 4 is a diagram showing the effect of the above configuration. FIG. 4 is a diagram showing the heights of the joints 40, 42, 44, 46 along the radial direction R at the other end 16 of the coil end at the other end 16 of the stator core 12. As shown in FIG. 4, along the radial direction R, the joint portion 40 having a high axial height, the joint portion 42 having a low axial height, the joint portion 44 having a high axial height, and the axial height The lower joints 46 are sequentially arranged. Thereby, between the adjacent joint parts 40 and 42, between the joint parts 42 and 44, and between the joint parts 44 and 46, the space for insulation and the insulation distance are secured, respectively, and the radial direction R of the coil end is secured. The size can be suppressed.

  FIG. 5 is a diagram showing the state of each joint portion of the prior art corresponding to FIG. Prior art joints 41, 43, 45, 47 corresponding to joints 40, 42, 44, 46 are formed with the same axial height. Since the bonding space and the insulation distance cannot be secured as they are, in the prior art, each conductor segment is bent little by little toward the outer peripheral side in the radial direction R as shown in FIG. Therefore, in the prior art, the coil end at the end 16 on the other side of the stator core 12 increases in the radial direction R.

  FIGS. 6 to 9 are diagrams illustrating the stator 50 in which the positions in the circumferential direction of adjacent joints are different from each other with the axial height of each joint being the same. 6 corresponds to FIG. 1, FIG. 7 corresponds to FIG. 2, and FIG. 8 corresponds to FIG. FIG. 9 is a diagram for explaining the operational effect of the stator 50 in comparison with the prior art. The stator 10 and the stator 50 are almost the same except that the adjacent joints have different axial heights or different positions along the circumferential direction. Below, the part which is different from the stator 10 is mainly demonstrated, and description of the same part is abbreviate | omitted.

  FIG. 6 is a diagram illustrating a configuration of the stator 50. The coil 51 is composed of conductor segments 58, 60, 62, 64, 66. The joint portions 70, 72, 74, and 76 formed by joining the conductor segments arranged adjacent to each other for the conductor segments 58, 60, 62, 64, and 66 inserted across the two slots 20 and 22 are as follows. The positions in the circumferential direction are different from each other with the same axial height.

  That is, the conductor segment 58 and the conductor segment 60 are joined together to form the joined portion 70, the conductor segment 60 and the conductor segment 62 are joined together to form the joined portion 72, and the conductor segment 62 and the conductor segment 64 are joined together. Thus, the joint portion 74 is formed, and the conductor segment 64 and the conductor segment 66 are joined together to form the joint portion 76.

Here the position along the circumferential direction θ of the slot 22 as a reference position, the position along the circumferential direction θ of the joint 70, 74 from the reference position to the D _1, along the circumferential direction θ of the joint 72, 76 Assuming that the position is D ₂ , the joining portions 70, 72, 74, and 76 are formed so that D ₁ <D ₂ . Thus, the position in the circumferential direction θ is the junction 70 and 74 is D _1, the position in the circumferential direction θ are alternately arranged along the joint 72, 76 Toga径direction R is D _2.

  That is, the joint portions 70, 72, 74, 76 are arranged in a staggered manner in the region in the circumferential direction θ and the radial direction R between the slots 20, 22. Thereby, between the adjacent joining parts 70 and 72, between the joining parts 72 and 74, and between the joining parts 74 and 76, the space for insulation and the insulation distance are secured, respectively, and the radial direction R of the coil end is secured. The size can be suppressed.

  FIG. 7 is a diagram showing a procedure for forming the coil 51 of FIG. What is different from FIG. 2 is the length of the leg portions of the conductor segments 60, 62 and 64. The lengths of the two legs in the conductor segments 60, 62, 64 are the same, but the lengths of the two legs in the conductor segment 62 are the same as those of the conductor segments 60, 64, as shown in FIG. Shorter than the length of the two legs. That is, when viewed from the length of the conductor segment along the axial direction, the conductor segment 62 is longer than the conductor segments 60 and 64.

As shown in FIG. 7C, the leg protruding from the slot 20 in the conductor segment 60 having a short axial length is joined to the leg protruding from the slot 22 in the conductor segment 62 having a long axial length. A portion 72 is formed. In addition, the leg portion protruding from the slot 20 in the conductor segment 62 having a long axial length and the leg portion protruding from the slot 22 in the conductor segment 64 having a short axial length are joined to form a joint portion 74. Due to the difference in the length in the axial direction, the position D ₂ along the circumferential direction θ of the joint portion 72 is longer than the position D ₁ along the circumferential direction θ of the joint portion 74. That is, D ₁ <D ₂ .

Although not described in FIG. 7, the conductor segments 58 and 66 have a long axial length as a conductor segment, like the conductor segment 62. Therefore, since the leg portion of the conductor segment 62 having a long axial length is inserted into the slot 20 and the leg portion of the conductor segment 60 having a short axial direction is inserted into the slot 22, the circumferential direction of the joint portion 70 in FIG. The position along is D ₁ . Further, since the leg portion of the conductor segment 64 having a short axial length is inserted into the slot 20 and the leg portion of the conductor segment 66 having a long axial length is inserted into the slot 22, the circumference of the joint portion 76 in FIG. the position along the direction θ becomes D _2.

In this way, the joint portion 70, 74 located along the circumferential direction θ is D _1, the position along the circumferential direction θ is along the joint 72,46 Toga径direction R is D ₂ alternating It is formed so that it may be arranged. That is, the joint portions 70, 72, 74, and 76 are arranged in a staggered manner within the region in the circumferential direction θ and the radial direction R between the slots 20 and 22.

  FIG. 8 is a top view seen from the other end 16 of the stator core 52 and corresponds to FIG. The winding method of the coil 11 is exactly the same as in FIG. 3, and the positions of the joints 70, 72, 74, and 76 are indicated by black circles. As can be seen from FIG. 8, the joint portions 70, 72, 74, and 76 are arranged in a staggered manner within the region in the circumferential direction θ and the radial direction R between the two slots.

  FIG. 9 is a diagram for explaining the effect of the configuration of FIG. 6 in comparison with the prior art. FIG. 9 is a top view as seen from the other end 16 of the stator core 52, similarly to FIG. 8, and shows the position of the joint between the slots 20 and 22.

  FIG. 9A is a view showing the prior art, and corresponds to a top view when FIG. 5 is viewed from the end 16 on the other side. The prior art joints 41, 43, 45, 47 (see FIG. 5) corresponding to the joints 70, 72, 74, 76 of FIG. 8 have the same position along the circumferential direction θ. Further, as described in FIG. 5, the axial height from the other end 16 is the same. As a result, the joint portions 41, 43, 45, and 47 of the prior art are almost in contact with each other in both the circumferential direction θ and the axial direction Z, and as it is, the joining space and the insulation distance cannot be secured.

  On the other hand, according to the configuration of FIG. 6, as shown in FIG. 9B, the joints 70, 72, 74, and 76 have the same axial height but are positioned along the circumferential direction θ. Are different between adjacent joints. Thereby, it arrange | positions in zigzag form within the area | region of the circumferential direction (theta) and radial direction R between the slots 20 and 22, and it can ensure sufficient space for a joint and an insulation distance between adjacent junction parts. it can.

  10, 50 (rotary electric machine) stator, 11, 51 (stator, U phase) coil, 12, 52 stator core, 13 magnetic thin plate, 14 one end, 16 other end, 20, 22, 24, 26 slots, 28, 30, 32, 34, 36, 58, 60, 62, 64, 66 conductor segments, 40, 41, 42, 43, 44, 45, 46, 47, 70, 71, 72, 73, 74 75, 76, 77 Junction.

Claims (2)

An annular stator core having a plurality of slots arranged along the inner circumferential direction;
Using a plurality of conductor segments respectively inserted across two predetermined slots separated by a predetermined slot interval, the end portions of the conductor segments are sequentially joined to each other at the axial end portion of the stator core to form a joint portion. While the stator coil wound around the stator core,
With
A plurality of joints formed by joining adjacent conductor segments with respect to a plurality of conductor segments inserted across two predetermined slots are axial heights of joints arranged adjacent to each other in the radial direction of the stator core. The rotating electrical machine stator is characterized in that joints with different axial heights and joints with a high axial height and joints with a low axial height are alternately arranged along the radial direction. An annular stator core having a plurality of slots arranged along the inner circumferential direction;
Using a plurality of conductor segments respectively inserted across two predetermined slots separated by a predetermined slot interval, the end portions of the conductor segments are sequentially joined to each other at the axial end portion of the stator core to form a joint portion. While the stator coil wound around the stator core,
With
A plurality of joint portions formed by joining adjacent conductor segments with respect to a plurality of conductor segments inserted across two predetermined slots are arranged in the circumferential direction of the joint portion disposed adjacent to the radial direction of the stator core. A rotating electrical machine stator having different positions along the same.

Images