JP6276148B2 - Rotating electrical machine stator - Google Patents

Description

  The present invention relates to a rotating electrical machine stator including a stator cuff disposed on an axial end surface of a stator core.

  Conventionally, a segment coil formed by connecting a plurality of conductor segments may be used for a stator coil of a rotating electrical machine. In this case, a stator cuff may be used to facilitate the work of bending the conductor segments and winding them around the stator teeth. The stator cuff is disposed on the axial end surface of the stator core. Stator teeth projecting in the radial direction are formed on the inner peripheral surface of the stator core, and the cuff teeth of the stator cuff are disposed on the axial end surface of the stator teeth. Then, the conductor segment is bent along the curved upper surface of the cuff satis.

  The stator coil is housed in a slot between the stator teeth and wound around the stator teeth, but is not fixed to the stator teeth. Therefore, varnish is poured into the slot and the stator coil is fixed.

  Patent Document 1 describes that a T-shaped stator cuff is disposed on the annular yoke portion of the stator core and the axial end surface of the stator teeth.

JP 2013-143819 A

  When the stator cuff has an annular outer annular portion disposed on one end surface in the axial direction of the yoke portion of the stator core, and a cuff teeth disposed on one end surface in the axial direction of the stator teeth connected to the inner diameter side of the outer annular portion. There is. When the stator coil is fixed to the stator core, first, the conductor segment is inserted into the slot between the stator teeth from the other side in the axial direction, and the leading end portion of the conductor segment is projected from the cuff slot between the cuff teeth. And after bending this front-end | tip part to a predetermined direction, a varnish is dripped from the upper direction of a stator core. However, when all the upper end surfaces of the outer annular portion are flat surfaces, the varnish tends to stay on the outer annular portion and solidify, and the varnish does not contribute to fixing the stator coil and the stator core, which is the original purpose. For this reason, waste is generated in the varnish, which increases the amount of varnish used.

  The objective of this invention is providing the rotary electric machine stator which can suppress the increase in the usage-amount of a varnish with the structure which has a stator cuff.

  A rotating electrical machine stator according to the present invention includes an annular yoke, stator teeth projecting radially from a plurality of circumferential positions on the inner peripheral surface of the yoke, and a plurality of slots formed between the adjacent stator teeth. A stator core including: a stator cuff disposed on one end surface in the axial direction of the stator core; and a stator coil including a plurality of segment coils wound around the plurality of stator teeth. The plurality of segment coils have a plurality of conductor segments connected to each other by bending portions protruding outward from one axial end of the stator core, and fixed to the stator core with a varnish. An outer annular portion disposed on the outer annular portion, and a plurality of cuff teeth connected to the outer annular portion and extending on the plurality of stator teeth, and out of one end in the axial direction of the stator core among the plurality of segment coils. And a plurality of cuff teeth disposed inside the bent portion. The outer annular portion is formed at a position corresponding to the cuff satiety in the circumferential direction, and a circumferential varnish guide surface that is higher in a position corresponding to the middle in the circumferential direction of the cuff satis, and a position corresponding to the slot in the circumferential direction. And a radial varnish guide surface that decreases from the outer diameter side toward the inner diameter side.

  According to the rotating electrical machine stator of the present invention, an increase in the amount of varnish used can be suppressed with the configuration having the stator cuff.

1 is a perspective view showing a rotating electric machine stator according to an embodiment of the present invention with a part thereof omitted. FIG. FIG. 2 is a perspective view showing a state in which a one-phase segment coil is mounted on a stator core in the rotating electrical machine stator of FIG. 1. FIG. 2 is a schematic perspective view showing a first coil element formed by a segment coil for one phase in the rotating electric machine stator of FIG. 1. It is a figure which shows the state before mounting | wearing with a stator core in the conductor segment which comprises the segment coil contained in the rotary electric machine stator of FIG. FIG. 2 is an enlarged perspective view showing a state before fixing of a stator coil in part A of FIG. 1. It is the figure which looked at the stator cuff from the upper part of FIG.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. The shapes, materials, quantities, and the like described below are illustrative examples and can be changed depending on the specifications of the rotating electrical machine stator. Below, the same code | symbol is attached | subjected and demonstrated to the same structure. The rotating electrical machine stator constitutes the rotating electrical machine in combination with a rotor fixed to the rotating shaft. The rotating electrical machine is used as a motor or a generator, or a motor generator having both functions of a motor and a generator.

  FIG. 1 is a perspective view showing a rotating electrical machine stator 10 of the present embodiment. FIG. 2 is a perspective view showing a state in which the U-phase segment coil 30 is mounted on the stator core 12 in the rotating electrical machine stator 10. FIG. 3 is a perspective view showing the first U-phase coil element 21u formed by the U-phase segment coil 30 in the rotating electrical machine stator 10. FIG. Hereinafter, the rotating electrical machine stator 10 is simply referred to as a stator 10.

  The stator 10 includes a stator core 12, a stator cuff 40, a U-phase coupling coil body 20u, a V-phase coupling coil body 20v, and a W-phase coupling coil body 20w, which are three-phase coupling coil bodies. The three-phase coupling coil bodies 20u, 20v, and 20w constitute the stator coil 20 as a three-phase coil assembly as a whole.

  The stator core 12 is formed by laminating a plurality of electromagnetic steel plates, which are magnetic materials, in the axial direction. The stator core 12 includes an annular yoke 13 and a plurality of stator teeth 14 projecting radially from a plurality of circumferential positions on the inner peripheral surface of the yoke 13. Stator core 12 has a plurality of slots 15 formed between adjacent stator teeth 14. The stator core 12 may be formed by pressure molding a resin binder and magnetic material powder. Here, the “circumferential direction” refers to a circumferential direction around the central axis O of the stator 10. The “radial direction” refers to the radial direction orthogonal to the central axis O, and the “axial direction” refers to the axial direction of the stator 10.

  Stator cuff 40 is disposed on one axial end surface (upper end surface in FIG. 1) of stator core 12. In FIG. 1, only a part of the circumferential direction of the stator cuff 40 is shown. In FIG. 1, the stator 10 is shown in a state in which the central axis O is directed in the vertical direction with the direction different from the actual use state by 90 degrees. The stator cuff 40 is used for assisting bending work of a conductor segment 31 (FIG. 4) constituting a segment coil 30 described later. The stator cuff 40 will be described in detail later.

  Of the three-phase coupling coil bodies 20u, 20v, and 20w, the U-phase coupling coil body 20u will be described first. As shown in FIGS. 2 and 3, the U-phase coupling coil body 20 u is formed of a first U-phase coil element 21 u on the power line side and a second U-phase coil element 22 u on the neutral point side. As will be described later, the U-phase coil elements 21u and 22u are formed in substantially the same shape by connecting a plurality of segment coils 30 (FIG. 3) in an annular shape. A U-phase lead wire 23u provided at one end of the first U-phase coil element 21u is connected to a U-phase power line (not shown) on the power supply side. The other end of first U-phase coil element 21u is connected to one end of second U-phase coil element 22u. The other end of second U-phase coil element 22u is connected to a neutral point bus bar (not shown) as a neutral point of stator coil 20. One element coil constituting each U-phase coil element 21u, 22u corresponds to one segment coil 30. Each segment coil 30 is formed by connecting a plurality of conductor segments 31 (FIG. 4) to be described later in the radial direction.

  As shown in FIGS. 2 and 3, the first U-phase coil element 21 u includes a plurality of segment coils 30 denoted by reference numerals C1, C2,. The second U-phase coil element 22u has a plurality of segment coils 30 labeled C9, C10... C16. In the plurality of segment coils 30, C1, C2,... C16 are sequentially arranged from the power line connection side toward the neutral point connection side. In each U-phase coil element 21u, 22u, the plurality of segment coils 30 are arranged at a plurality of positions in the circumferential direction of the stator core 12.

  Each segment coil 30 is bent at one end or the other end of a plurality of U-shaped conductor segments 31 by bending a portion protruding outward from one axial end (upper end in FIG. 2) of the stator core 12. It is formed by joining the ends of the parts together by welding. Each segment coil 30 is wound around the plurality of stator teeth 14 in a state where both circumferential ends of each segment coil 30 are partially inserted into the two slots 15.

  In the operation of forming each segment coil 30, first, a plurality of U-shaped conductor segments 31 shown in FIG. 4 are prepared. Each conductor segment 31 has two leg portions 32 that are parallel to each other, and a connecting portion 33 that connects one end of each leg portion 32 and is formed in a mountain shape. Each conductor segment 31 is formed by covering an intermediate portion in the length direction of a conductor wire 34 having a rectangular shape with a rectangular cross section with an insulating film 35 and exposing both ends of the conductor wire 34 from the insulating film 35. .

  The conductor segments 31 are inserted into the two slots 15 in a state in which a plurality of conductor segments 31 are arranged in the radial direction from the other axial side of the stator core 12 (the lower side in FIG. 2). In addition, the leg 32 of each conductor segment 31 forming each segment coil 30 is inclined with respect to the axial direction in a direction in which the portions protruding outward from the one axial end surface (upper end surface in FIG. 2) of the stator core 12 approach each other. It is bent and formed.

  Further, the tip of the bent portion of the conductor segment 31 is further bent to extend outward in the axial direction. And in the some conductor segment 31, the front-end | tip part extended in the axial direction of the conductor segment 31 of the same phase adjacent to radial direction is joined and connected by welding, such as TIG welding. As a result, the plurality of conductor segments 31 are connected to each other by bending portions protruding outward from one axial end of the stator core 12. When the conductor segment 31 is formed by bending, a stator cuff 40 described later is used.

  In each segment coil 30, the leg portions 32 of the two conductor segments 31 disposed at both ends in the radial direction of the stator 10 are bent toward the other segment coil 30 adjacent in the circumferential direction. And in the adjacent segment coil 30, the front-end | tip part of the leg part 32 of the two conductor segments 31 arrange | positioned at a radial direction edge part is joined by welding.

  As shown in FIG. 3, the first U-phase coil element 21 u is formed in an annular shape by connecting ends of a plurality of segment coils 30. In FIG. 3, the segment coils 30 adjacent in the circumferential direction have their winding directions opposite to each other in the current direction. Similarly to the first U-phase coil element 21u, the second U-phase coil element 22u (FIG. 2) is formed in an annular shape by connecting the end portions of the plurality of segment coils 30. In each of the U-phase coil elements 21u and 22u, the leg portions 32 of the respective segment coils 30 are inserted into the plurality of slots 15 while being shifted to one side in the circumferential direction by one slot 15.

  In FIG. 2, a segment coil 30 (C8 in FIGS. 2 and 3) disposed at the other circumferential end of the first U-phase coil element 21u and a segment coil 30 disposed at one circumferential end of the second U-phase coil element 22u. (C9 in FIG. 2) are connected by welding. Thereby, the U-phase coupling coil body 20u is formed. The U-phase lead wire 23u of the U-phase coupling coil body 20u is a leg portion at one end in the radial direction of the segment coil 30 (C1 in FIGS. 2 and 3) disposed at one end in the circumferential direction of the first U-phase coil element 21u. It is formed by bending 32 into a crank shape.

  The V-phase coupling coil body 20v and the W-phase coupling coil body 20w (FIG. 1) are also configured similarly to the U-phase coupling coil body 20u. Similarly to the U-phase coupling coil body 20u, the segment coil 30 arranged at one end in the circumferential direction of the V-phase coupling coil body 20v and the W-phase coupling coil body 20w also has a V-phase lead wire 23v and a W-phase lead wire 23w. Are formed respectively.

  Such a V-phase coupling coil body 20v is arranged so as to be wound around the plurality of stator teeth 14 while being shifted to one side in the circumferential direction by two slots 15 with respect to the U-phase coupling coil body 20u. The W-phase coupling coil body 20w is further shifted from the V-phase coupling coil body 20v by one of the two slots 15 toward one side in the circumferential direction, and is arranged to be wound around the plurality of stator teeth 14.

  The other end portions of the coupling coil bodies 20u, 20v, 20w of the respective phases are formed to extend to the outer diameter side and are connected to each other by a neutral point bus bar (not shown).

  Such multi-phase connecting coil bodies 20u, 20v, 20w form a stator coil 20. The stator coil 20 includes two coil ends 36 and 37 that protrude outward from both axial ends of the stator core 12. The stator coil 20 is fixed to the stator core 12 with a varnish as described later.

  Next, the stator cuff 40 will be described with reference to FIGS. FIG. 5 is an enlarged perspective view of the portion A in FIG. FIG. 6 is a view of the stator cuffs viewed from above in FIG. Stator cuff 40 is non-magnetic and is formed of a resin material that is an insulating material such as PPS.

  The stator cuff 40 includes an outer annular portion 41, an inner annular portion 42, a plurality of cuff teeth 43, and a cuff slot 44 that is a plurality of holes. The outer annular portion 41 is formed in an annular shape. The outer annular portion 41 has a first circumferential varnish guide surface 41a, a second circumferential varnish guide surface 41b, and a radial varnish guide surface 41c, which will be described later. The outer annular portion 41 is disposed on the yoke 13 of the stator core 12.

  The inner annular portion 42 is formed in an annular shape having the same central axis as the outer annular portion 41, and is disposed on the radially inner side of the outer annular portion 41.

  The cuff teeth 43 connect a plurality of circumferential positions of the inner peripheral surface of the outer annular portion 41 and the outer peripheral surface of the inner annular portion 42 in the radial direction. Each cuff satice 43 is formed in a block shape having a square shape when viewed in the radial direction. Each cuff satice 43 may have a configuration in which arc-shaped chamfers are formed at both ends in the circumferential direction of a rectangular upper end when viewed in the radial direction. The “upper end” means not the upper end when the rotating electrical machine is used, but the upper end when the varnish is dropped from above the stator core 12 as described later. The meaning of “upper” described below means the upper side in the same state. The plurality of cuff teeth 43 are arranged so as to cover the upper surfaces of the corresponding plurality of stator teeth 14 of the stator core 12. The surfaces on the stator core 12 side of the plurality of cuff teeth 43, the outer annular portion 41, and the inner annular portion 42 are in surface contact with one axial end surface of the stator core 12.

  The plurality of cufflink slots 44 are formed so as to be surrounded by the outer annular portion 41 and the inner annular portion 42 and the adjacent cuff teeth 43. Each cufflinker slot 44 is formed in a substantially rectangular shape. Each cuffer slot 44 is formed at the same position as the slot 15 of the stator core 12 and communicates with the axially open end of the slot 15. That is, most of the upper opening of the slot 15 is maintained.

  The outer annular portion 41 includes an inner circumferential annular element 411 on the inner diameter side and an outer circumferential annular element 412 on the outer diameter side relative to the inner circumferential ring element 411. On one end surface in the axial direction of the outer annular portion 41 (upper end surface in FIG. 5), there are a first circumferential varnish guiding surface 41a and a second circumferential varnish guiding surface 41b at a plurality of circumferential positions of the inner circumferential annular element 411. A radial varnish guide surface 41c is formed side by side in the circumferential direction.

  The first circumferential varnish guide surface 41a is a tapered surface that is formed at the same position as one half (left side in FIG. 6) in the circumferential direction of each cuff satice 43 in the circumferential direction. The first circumferential varnish guide surface 41a is formed so as to approach the inner side in the axial direction of the stator core 12 (the back side in FIG. 6) toward one circumferential direction (left side in FIG. 6). In other words, the outer annular portion 41 has a mountain shape as a whole at a position corresponding to the cuff satice 43 in the circumferential direction, and is high at a position corresponding to the center in the circumferential direction of the cuff satice 43 and is lowered toward the periphery. As a result, a position corresponding to the cuff teeth 43 in the circumferential direction of the outer annular portion 41 has a mountain shape that protrudes upward in FIG. 5 when viewed from the outer diameter side. And the 1st circumferential direction varnish guide surface 41a is formed with the upper surface of the circumferential direction one side half part of a mountain shape. Accordingly, the first circumferential varnish guide surface 41 a is formed at a position corresponding to the cuff satis te 43 in the circumferential direction of the outer annular portion 41, and the position corresponding to the center in the circumferential direction of the cuff satis 43 is the highest. The first circumferential varnish guide surface 41a becomes lower toward the one circumferential side surface (the left side surface in FIGS. 5 and 6) of the cuff satice 43.

  The 2nd circumferential direction varnish guide surface 41b is a taper surface formed in the same position as the other circumferential direction other side (right side of FIG. 6) half part of each cuff satice 43 in the circumferential direction. The second circumferential varnish guide surface 41b is formed so as to approach the axially inner side of the stator core 12 toward the other circumferential side (the right side in FIG. 6). That is, the second circumferential varnish guide surface 41b is formed by the upper surface of the other half portion in the circumferential direction in the chevron shape formed at the position corresponding to the cuff satisie 43 in the circumferential direction of the outer annular portion 41. As a result, the second circumferential varnish guide surface 41 b is formed at a position corresponding to the cuff satice 43 in the circumferential direction of the outer annular portion 41, and the position corresponding to the center in the circumferential direction of the cuff satice 43 is the highest. The second circumferential varnish guide surface 41b becomes lower toward the other circumferential side surface (the right side surface in FIGS. 5 and 6) of the cuff satice 43. Accordingly, the respective circumferential varnish guide surfaces 41 a and 41 b are arranged symmetrically in the circumferential direction on the outer diameter side of the cuff satice 43.

  The radial varnish guide surface 41c is a tapered surface formed at a position corresponding to the slot 15 in the circumferential direction. The radial varnish guide surface 41c is formed so as to approach the inner side in the axial direction of the stator core 12 from the outer diameter side toward the inner diameter side. That is, the radial direction varnish guide surface 41c becomes lower from the outer diameter side toward the inner diameter side. Both circumferential ends of each radial varnish guide surface 41c are connected to the first circumferential varnish guide surface 41a and the second circumferential varnish guide surface 41b on both sides in the circumferential direction. As a result, the first circumferential varnish guide surface 41a, the second circumferential varnish guide surface 41b, and the radial varnish guide surface 41c are continuous along the circumferential direction of the stator cuff member 40, and are connected over the entire circumference. Is done.

  In addition, on the one end surface in the axial direction of the outer annular portion 41, a planar outer annular plane 41 d that is orthogonal to the central axis O is formed on the outer circumferential annular element 412. The outer annular plane 41d is omitted, and the annular portion where the first circumferential varnish guide surface 41a, the second circumferential varnish guide surface 41b, and the radial varnish guide surface 41c are formed is the outer annular portion 41 correspondingly. It can also be provided in the entire radial direction.

  At the time of manufacturing the stator 10, the leg portions 32 of the conductor segments 31 constituting the segment coil 30 are in contact with the upper end portions of the cuff teeth 43 and bent. The plurality of cuff teeth 43 are disposed inside a portion of the plurality of segment coils 30 that protrudes outward from one axial end of the stator core 12 and is bent. By such a stator cuff 40, the position of the bent portion is regulated when the conductor segment 31 is bent, and the axial height of one of the two coil ends 36, 37 is accurately regulated to a desired value.

  It should be noted that the circumferential end of the portion formed by connecting the first circumferential varnish guide surface 41 a and the second circumferential varnish guide surface 41 b is increased in length so as to reach the outer diameter side of the cuff slot 44. May be.

  Moreover, if the 1st circumferential direction varnish guide surface 41a and the 2nd varnish guide surface 41b are surfaces formed so that the position corresponding to the center of the circumferential direction of the cuff satice 43 may become high, each upper side becomes a convex surface. It is good also as a curved surface formed in the cross-sectional arc shape. As long as the radial varnish guide surface 41c is a surface that decreases from the outer diameter side toward the inner diameter side, the radial varnish guide surface 41c may be a curved surface formed in a circular arc shape so that the upper side becomes a convex surface.

  Furthermore, when the conductor segment 31 is bent when the stator 10 is manufactured, the leg portion 32 of the conductor segment 31 is bent and formed on the upper surface of the cuff satice 43. At the time of bending the leg portions 32, each leg portion 32 is bent and formed so as to be twisted in one circumferential direction or the other circumferential direction by a rotating jig (not shown) arranged on the upper side of FIG. The The rotating jig includes a first rotating element that twists a part of the plurality of legs 32 to one side in the circumferential direction, and a second rotating element that twists the remaining legs 32 to the other side in the circumferential direction. The two rotating elements are rotatably arranged so as to have the same central axis. The distal ends of the plurality of leg portions 32 are twisted as the rotating elements rotate while being inserted into the holes of the rotating elements.

  The stator coil 20 is fixed to the stator core 12 with varnish. As shown in FIG. 5, in fixing the stator coil 20 to the stator core 12, the stator core 12 is arranged such that one of the two coil ends 36, 37 is arranged on the upper side with the axial direction aligned with the vertical direction. In this state, varnish is dropped from above. At this time, as indicated by an arrow α in FIG. 5, the varnish is dropped from above a plurality of positions in the circumferential direction of the outer annular portion 41 of the stator cuff 40.

  By dropping the varnish, the varnish is impregnated on one axial side of the stator coil 20 (upper side in FIG. 5). Thereafter, the stator core 12 is turned upside down, and the varnish is similarly dropped from above with the other coil end 37 disposed on the upper side. As a result, the other side of the stator coil 20 in the axial direction (the lower side in FIG. 5) is impregnated with the varnish.

  Then, the varnish is cured by keeping the stator coil 20 warm with a heat retaining device (not shown). Accordingly, the stator coil 20 and the stator cuff 40 are fixed to the stator core 12 by the varnish, and the stator 10 is formed.

  According to the stator 10 of this embodiment, when the stator coil 20 is fixed to the stator core 12, the varnish is dropped on the upper side of the outer annular portion 41 of the stator cuff 40. Of the outer annular portion 41, the varnish that has landed on the upper surface of the inner circumferential annular element 411 is indicated by arrows β1 and β2 in FIG. 5 by the first circumferential varnish guide surface 41a and the second circumferential varnish guide surface 41b. Guided to flow toward the radial varnish guide surface 41c. The varnish that has flowed to the radial varnish guide surface 41 c is guided so as to flow into the cuffer slot 44 on the inner diameter side as indicated by an arrow γ in FIG. 5, and flows into the slot 15 through the cuffer slot 44. The varnish that has flowed into the slot 15 is effectively used to fix the stator core 12 and the stator coil 20. For this reason, it can suppress that a varnish stays on the outer peripheral part of the stator cuff 40, and it hardens | cures without contributing to fixation of the stator coil 20 and the stator core 12. FIG. Further, the varnish that has landed on the upper surface of the cuff satice 43 and has flowed to the outer diameter side is also guided to flow into the slot 15 by the circumferential varnish guide surfaces 41a and 41b and the radial varnish guide surface 41c. As a result, it becomes possible to fix the stator coil 20 to the stator core 12 while suppressing an increase in the amount of varnish used, so that the material cost of the varnish can be reduced. Moreover, since the adhesion of the varnish to unnecessary portions can be suppressed, the varnish trimming process can be easily abolished. Thereby, the productivity of the stator 10 can be improved.

  Further, since the stator cuff 40 is fixed to the stator core 12, it is not necessary to use a cuff which is a movable jig when the stator 10 is manufactured. For this reason, the structure having the segment coil 30 can simplify the manufacturing apparatus of the stator 10 and can reduce the cost.

  In addition, since the stator cuff 40 is formed of a nonmagnetic insulating material, the characteristics of the magnetic flux flowing through the stator core 12 are not adversely affected. Further, since the stator cuff 40 is made of a resin material, the hardness is lower than that of a metal material such as steel. For this reason, even if the segment coil 30 contacts the stator cuff 40, the insulating film 35 is hardly damaged. Thereby, it is easy to ensure insulation between the stator core and the segment coil.

  In the above, in the outer annular portion 41 of the stator cuff 40, the connecting portion of the first circumferential varnish guide surface 41a and the second circumferential varnish guide surface 41b is formed corresponding to the circumferential center position of the cuff satisie 43. explained. On the other hand, the connection part of the 1st circumferential direction varnish guide surface 41a and the 2nd circumferential direction varnish guide surface 41b should just be formed in the position corresponding to the circumferential direction intermediate part of the cuff satice 43, and the circumferential direction center position of the cuff satice 43 It may be formed at a position shifted in the circumferential direction. In the present embodiment, the stator cuff 40 is disposed only on one end surface in the axial direction of the stator core 12, but the stator cuff 40 may also be disposed on the other axial end surface (lower end surface in FIG. 1) of the stator core 12.

  DESCRIPTION OF SYMBOLS 10 Rotating electrical machine stator, 12 Stator core, 13 Yoke, 14 Stator teeth, 15 slots, 20 Stator coil, 20u U phase connection coil body, 20v V phase connection coil body, 20w W phase connection coil body, 21u 1st U phase coil element, 22u 2nd U-phase coil element, 23u U-phase lead wire, 23v V-phase lead wire, 23w W-phase lead wire, 30 segment coil, 31 conductor segment, 32 leg portion, 33 connecting portion, 34 conductor strand, 35 insulating film, 36, 37 Coil end, 40 Stator cuff, 41 Outer annular portion, 41a First circumferential varnish guide surface, 41b Second circumferential varnish guide surface, 41c Radial varnish guide surface, 41d Outer annular plane, 42 Inner annular portion, 43 Cufflinks, 44 cufflinks, 411 inner circumference Jo element 412 outer circular element.

Claims (1)

An annular yoke, stator teeth projecting radially from a plurality of circumferential positions on the inner peripheral surface of the yoke, a stator core having a plurality of slots formed between the adjacent stator teeth, and a shaft of the stator core A stator cuff disposed on one end surface in the direction, and a stator coil including a plurality of segment coils wound around the plurality of stator teeth,
The plurality of segment coils have a plurality of conductor segments connected to each other by bending portions protruding outward from one axial end of the stator core, and fixed to the stator core with a varnish,
The stator cuff is an outer annular portion disposed on the yoke, and a plurality of cuff teeth connected to the outer annular portion and extending on the plurality of stator teeth, of the plurality of segment coils, A plurality of cuff teeth disposed inside a portion that protrudes outward from one end in the axial direction and is bent;
The outer annular portion is formed at a position corresponding to the cuff satiety in the circumferential direction, and a circumferential varnish guide surface that is higher in a position corresponding to the middle in the circumferential direction of the cuff satis, and a position corresponding to the slot in the circumferential direction. A rotating electrical machine stator having a radial varnish guide surface formed on the outer diameter side and decreasing from the outer diameter side toward the inner diameter side.

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