JP2016144230A - Rotary electric machine stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a conductor segment from being damaged by a stator core and to prevent an insulation sheet within a slot from being displaced from a desired position when inserting the conductor segment into the slot in a rotary electric machine stator.SOLUTION: A stator includes a stator core, a segment coil, a resin stator cuff support and an insulation sheet. The stator cuff support is disposed outside of one end face in an axial direction of teeth. The segment coil is passed through the slot, wound around the teeth and formed by coupling a plurality of conductor segments of which the portions protruding outside of one end of the stator core in the axial direction are brought into contact with the stator cuff support. The insulation sheet includes: an axial direction face part that is disposed along a side face in a circumferential direction of the teeth; and a circumferential direction end part which is disposed along one end face in the axial direction of the teeth and held between one end face in the axial direction of the teeth and the stator cuff support.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a rotating electrical machine stator including a segment coil formed by connecting a plurality of conductor segments wound around teeth of a stator core, and an insulating sheet that insulates the conductor segments from the 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 some cases, the stator core and the segment coil are insulated by disposing an insulating sheet having electrical insulation between the conductor segment and the stator core.

  In Patent Document 1, an insulating sheet bent into a cylindrical shape having a U-shaped cross section is inserted into a slot formed between adjacent teeth of a stator core, and a conductor segment is disposed around the teeth via the insulating sheet. A configuration for winding is described.

JP 2002-165421 A

  In the configuration described in Patent Document 1, the conductor segment is inserted into the slot in order to wind the conductor segment around the teeth. When the conductor segment is inserted into the slot, the insulating sheet may move while being dragged by the conductor segment. As a result, the insulating sheet may deviate from the desired arrangement position, and the desired position between the stator core and the conductor segment may not be satisfactorily insulated.

  It is also desirable to prevent the conductor segment from contacting and damaging the stator core when the conductor segment is inserted into the slot.

  An object of the present invention is to provide a rotating electrical machine stator that can prevent a conductor segment from being damaged by a stator core and that can prevent the insulating sheet in the slot from shifting from a desired position when the conductor segment is inserted into the slot. is there.

  A rotating electrical machine stator according to the present invention includes an annular yoke, teeth projecting radially from a plurality of circumferential positions on the inner circumferential surface of the yoke, and a plurality of slots formed between adjacent teeth. A resin-made stator cuff disposed on the outside of one end surface in the axial direction of the teeth, and a plurality of conductor segments wound around the teeth through the slot, the outer side being one end in the axial direction of the stator core. A segment coil formed by connecting a plurality of conductor segments in contact with the stator cuff, an axial surface portion disposed along a circumferential side surface of the teeth, and an axial end surface of the teeth An insulating sheet having a circumferential end that is disposed along the axial end of the teeth and sandwiched between the stator cuffs Provided.

  According to the rotating electrical machine stator according to the present invention, it is possible to prevent the conductor segment from being damaged by the stator core, and to suppress the insulating sheet in the slot from being displaced from a desired position when the conductor segment is inserted into the slot.

It is the perspective view which looked at the circumferential direction part of the rotary electric machine stator of embodiment which concerns on this invention from the radial direction outer side. FIG. 2 is a perspective view of the rotating electrical machine stator of FIG. 1 as viewed from the inside in the radial direction, omitting conductor segments and some stator cuffs. (A) is the perspective view which takes out and shows an insulating sheet from FIG. 2, (b) is the figure which looked at (a) from the upper direction. 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. 3 is a view in which a stator cuff and a second stator cuff are arranged on both sides in the axial direction of a tooth and a conductor segment is wound around the tooth in the AA cross-sectional view of FIG. 2. It is a perspective view which shows another example of an insulating sheet.

  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 of a part of the rotating electrical machine stator 10 of this embodiment as viewed from the outside in the radial direction. FIG. 2 is a perspective view of the rotating electrical machine stator 10 as viewed from the inside in the radial direction, omitting the conductor segments and some of the stator cuffs. Hereinafter, the rotating electrical machine stator 10 is simply referred to as a stator 10.

  The stator 10 includes a stator core 12, a plurality of stator cuffs 30, a stator coil 40, and a plurality of insulating sheets 50. Stator coil 40 is configured as an assembly of U-phase coil 41u, V-phase coil 41v, and W-phase coil 41w.

  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 teeth 14 projecting radially from a plurality of positions in the circumferential direction on the inner peripheral surface of the yoke 13. Stator core 12 has a plurality of slots 15 formed between adjacent 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 of the stator 10. The “radial direction” refers to a radial direction orthogonal to the central axis of the stator 10, and the “axial direction” refers to the axial direction of the stator 10.

  As shown in FIG. 2, each of the plurality of stator cuffs 30 is arranged on the outside of one axial end surface (upper end surface in FIG. 2) of one tooth 14 corresponding to the stator core 12 via an insulating sheet 50 described later. Is done. In FIG. 2, only one stator cuff 30 is shown as the stator cuff 30, but actually, as shown in FIG. 1, each of the plurality of stator cuffs 30 is disposed on the corresponding tooth 14 (FIG. 2).

  The stator cuff 30 includes a main body portion 31 disposed on the teeth 14 and two leg portions 32 projecting toward the stator core 12 in the axial direction at both circumferential ends of the main body portion 31. The main body 31 has a quadrangular prism shape, and both ends in the circumferential direction at the upper end are chamfered, and the upper end is formed into an arc when viewed in the radial direction. The two leg portions 32 are formed in parallel flat plate shapes, and are inserted inside one axial end portion (upper end portion in FIG. 2) in the slots 15 on both sides of the tooth 14 where the main body portion 31 is disposed.

  The stator cuff 30 prevents damage when a conductor segment 43 (see FIG. 4) constituting a segment coil 42 described later is inserted into the slot 15, and an insulating sheet 50 described later is sandwiched between the teeth 14 and the insulating sheet. 50 position shift is suppressed.

  Returning to FIG. 1, the phase coils 41 u, 41 v, 41 w are wound around the teeth 14 (FIG. 2) via the stator cuffs 30. Each phase coil 41u, 41v, 41w is formed by connecting a plurality of segment coils 42 in an annular shape. Each segment coil 42 is formed by connecting a plurality of conductor segments 43 (FIGS. 1 and 4) wound around the teeth 14 through the slots 15 of the stator core 12.

  3A is a perspective view showing the insulating sheet 50 taken out from FIG. 2, and FIG. 3B is a view of FIG. 3A as viewed from above. The insulating sheet 50 includes an in-slot arrangement portion 51 that is inserted into the slot 15 of the stator core 12, and a core end surface arrangement portion 53 that is disposed outside the one axial end of the slot 15 and along the axial end surface of the stator core 12. including.

  The in-slot arrangement portion 51 includes a first axial surface portion 51a and a second axial surface portion 51b that are substantially parallel, and a connecting surface portion 51c that connects the radially outer ends of the first axial surface portion 51a and the second axial surface portion 51b. Have The first axial surface portion 51a is disposed and overlapped along the other circumferential side surface (left side surface in FIG. 2) of one (right side in FIG. 2) of two adjacent teeth 14 of the stator core 12. Cover almost all of the other side. The 2nd axial direction surface part 51b is arrange | positioned and overlapped along the circumferential direction one side surface (right side surface of FIG. 2) of the tooth | gear 14 of the other (left side of FIG. 2) among two adjacent teeth 14. On the other hand, it covers almost all sides. The connecting surface portion 51 c faces the portion between the two teeth 14 on the inner peripheral surface of the yoke 13 of the stator core 12 and covers almost all of the portion between the two teeth 14. In FIG. 2, in order to facilitate understanding of the shape of the insulating sheet 50, the axial surface portions 51 a and 51 b of the insulating sheet 50 are shown as being slightly separated from the circumferential side surface of the tooth 14, but in practice, they will be described later. As shown in FIG. 5, the axial surface portions 51 a and 51 b are brought into contact with and overlapped with the circumferential side surface of the tooth 14.

  The core end surface arrangement portion 53 is formed in a U shape so as to continuously follow one axial end surface (the upper end surface in FIG. 2) of adjacent teeth 14 and one axial end surface between the teeth 14 in the yoke 13. The The core end surface arrangement portion 53 includes a first circumferential end 53a on one circumferential side (left side in FIG. 3), a second circumferential end 53b on the other circumferential side (right side in FIG. 3), and a connecting portion 53c. Have. The first circumferential end 53a and the second circumferential end 53b are substantially parallel. The connection part 53c connects the radial direction outer end of the 1st circumferential direction edge part 53a and the 2nd circumferential direction edge part 53b linearly. One end in the axial direction (the upper end in FIGS. 2 and 3) of the in-slot arrangement portion 51 is coupled to the U-shaped inner peripheral portion of the core end surface arrangement portion 53. For example, the in-slot arrangement portion 51 is formed from a planar first material, and the core end surface arrangement portion 53 is formed from a U-shaped second planar material. Short cuts in the axial direction are formed at two positions on one end edge in the axial direction of the first material. Then, the first material is bent into a U shape along the direction of each cut to form the axial surface portions 51a and 51b and the connecting surface portion 51c. Further, one end portion in the axial direction of the first material is bent at right angles to the outside of the U shape by the length of each notch to form bonding margins 51d, 51e, and 51f as shown in FIG. 3B. Then, the bonding margins 51d, 51e, and 51f of the first material are bonded and bonded to the inner peripheral portion of the second material forming the core end surface arrangement portion 53.

  The insulating sheet 50 is formed of, for example, insulating paper having electrical insulation. As long as the insulating sheet 50 is formed from an electrically insulating material, a resin sheet, a film, a nonwoven fabric, or the like may be used other than the insulating paper.

  The insulating sheet 50 insulates a conductor segment 43 (FIG. 4), which will be described later, and the stator core 12. The core end surface arrangement portion 53 of the insulating sheet 50 is arranged outside the one end in the axial direction of the slot 15 and in the periphery of the opening end of the slot 15 on the one end surface in the axial direction of the stator core 12. At this time, the 1st circumferential direction edge part 53a and the 2nd circumferential direction edge part 53b of the core end surface arrangement | positioning part 53 are arrange | positioned along the axial direction one end surface of the adjacent teeth 14. FIG. As a result, two insulating sheets 50 are arranged on one tooth 14 of the stator core 12.

  In this regard, in the three teeth 14 arranged in the circumferential direction, 14-1, 14-2, 14-3 in order from the circumferential side one side (right side in FIG. 2) to the other side (left side in FIG. 2) of the stator core 12. This will be described using reference numerals. Moreover, it demonstrates using the code | symbol of 50-1, 50-2, 50-3, 50-4 to the four insulation sheets 50 located in a line with the circumferential direction in order from the circumferential direction one side to the other side.

  Two insulating sheets 50-1 and 50-2 adjacent in the circumferential direction are inserted into the slots 15 on both circumferential sides of the teeth 14-1 on the circumferential side. Of the two insulating sheets 50-1 and 50-2, the second circumferential end 53b of one insulating sheet 50-1 and the other insulating sheet 50-2 are disposed on one axial end surface of the teeth 14-1. 1st circumferential direction edge part 53a is arrange | positioned.

  Two insulating sheets 50-3 and 50-4 adjacent to each other in the circumferential direction are inserted into the slots 15 on both sides in the circumferential direction of the tooth 14-3 on the other circumferential side. Of the two insulating sheets 50-3 and 50-4, the second circumferential end 53b of one insulating sheet 50-3 and the other insulating sheet 50-4 are provided on one axial end surface of the teeth 14-3. 1st circumferential direction edge part 53a is arrange | positioned.

  Of the two insulation sheets 50-2 and 50-3, the second circumferential end 53b of one insulation sheet 50-2 and the other insulation are provided on one axial end surface of the circumferential middle teeth 14-2. A first circumferential end 53a of the sheet 50-3 is disposed.

  And as shown about the intermediate teeth 14-2, two insulating sheets 50-2, 50 are provided outside the one end surface in the axial direction of the teeth 14-2 by the stator cuff 30 and the one end surface in the axial direction of the teeth 14-2. -3, circumferential end portions 53b and 53a arranged on the teeth 14-2 are sandwiched.

  Next, the segment coil 42 which comprises each phase coil 41u, 41v, 41w is demonstrated. FIG. 4 is a diagram showing a state before the conductor segment 43 constituting the segment coil 42 is attached to the stator core 12. The conductor segment 43 has two straight leg portions 44 and a connecting portion 45 that connects the leg portions 44 before being attached to the stator core 12, and is formed in a U shape. In the conductor segment 43, a conductor wire 46, which is a flat wire, is covered with an insulating film 47, and both end portions of the conductor element wire 46 are exposed from the insulating film 47.

  FIG. 5 is a view in which the stator cuff 30 and the second stator cuff 60 are disposed on both sides in the axial direction of the tooth 14 and the conductor segment 43 is wound around the tooth 14 in the AA cross-sectional view of FIG. In FIG. 5, the thickness of the insulating sheet 50 is exaggerated for easy understanding of the shape of the insulating sheet 50.

  When the segment coil 42 is formed, a plurality of conductor segments 43 are arranged in the radial direction, and the leg portions 44 of the conductor segments 43 are connected to the stator core 12 from the upper side to the lower side of the stator core 12 as indicated by an arrow α in FIG. Twelve circumferentially spaced two slots 15 are inserted. Then, as shown in FIG. 5, the portion protruding from the lower end of the stator core 12 at the tip of each leg 44 is bent and formed in a direction inclined with respect to the circumferential direction. At this time, in the connecting portion 45 of the conductor segment 43, the vicinity of the linear leg portion 44 contacts the chamfering of the main body portion 31 of the stator cuff 30.

  Since the stator cuff 30 is made of resin, damage to the insulating film 47 can be prevented even if the conductor segment 43 contacts. FIG. 5 shows a state in which the second stator cuff 60 is disposed on the other axial end surface (the lower end surface in FIG. 5) of the stator core 12. The second stator cuff 60 has a shape in which the leg portions 32 on both sides are omitted from the stator cuff 30 arranged at one end of the stator core 12 in the axial direction. The second stator cuff 60 facilitates the bending work by bending the leg 44 in contact with the chamfer at the lower end when the leg 44 of the conductor segment 43 is bent.

  The stator cuff 30 and the second stator cuff 60 may be held in a radial direction by a jig (not shown) from the inner peripheral side and the outer peripheral side when the conductor segment 43 is inserted into the slot 15. For example, a columnar column part included in a first jig (not shown) is inserted inside the stator core 12, and each stator cuff 30 and each second cuff are provided on the outer peripheral surface of the column part protruding from both axial ends of the stator core 12. The radial inner end of the stator cuff 60 is abutted. And you may press the some radial direction movement part which the 2nd jig | tool which is not shown in figure to the radial direction outer end of each stator cuff 30 and each 2nd stator cuff 60 in radial direction. The radial direction moving part is held movably along the radial direction with respect to the fixed part. By holding the stator cuff 30 with the first jig and the second jig, the holding force for holding the insulating sheet 50 between the stator cuff 30 and the stator core 12 is improved. The stator core 12 may be held by the first jig. Further, the second stator cuff 60 may be omitted.

  At both ends of the leg portion 44 of the conductor segment 43, axial end portions 48 extending in the axial direction are formed at the tip portions of the portions protruding downward from the other axial end surface of the stator core 12. An end 48 in the axial direction of the conductor segment 43 is overlapped with and welded to an axial end (not shown) of another conductor segment 43 in the radial direction. Thus, one winding portion of the coil is formed so as to straddle the plurality of teeth 14. By repeating this so as to join the radially overlapped portions of the axial end portions 48 of the plurality of conductor segments 43 arranged side by side in the radial direction, a segment coil 42 as one unit coil is formed. Is done. Accordingly, the segment coil 42 is formed by connecting a plurality of conductor segments 43. At this time, the portion of the conductor segment 43 inserted into the slot 15 and the stator core 12 are insulated by the in-slot arrangement portion 51 of the insulating sheet 50. Then, the segment coils 42 wound and arranged at a plurality of locations in the circumferential direction of the stator core 12 are connected in an annular shape, thereby forming the U, V, W phase coils 41u, 41v, 41w (FIG. 1). The

  In FIG. 1, a U-phase first connected coil element 49u1 formed by annularly connecting a plurality of U-phase segment coils 42 and a U-phase first connected coil element 49u1 formed by annularly connecting a plurality of other U-phase segment coils 42. The case where the 2 connection coil element 49u2 is formed is shown. One end of the U-phase first connection coil element 49u1 and one end of the U-phase second connection coil element 49u2 are connected to form a U-phase coil 41u. The U-phase second connecting coil element 49u2 is inserted into the slot 15 that is shifted by one to the circumferential direction one side (right side in FIG. 1) with respect to the U-phase first connecting coil element 49u1.

  The V-phase coil 41v and the W-phase coil 41w are formed in the same manner as the U-phase coil 41u. The U-phase coil 41 u, the V-phase coil 41 v, and the W-phase coil 41 w are inserted into the slots 15 that are shifted in the circumferential direction of the stator core 12. As a result, a three-phase stator coil 40 is formed which is wound around the teeth 14 of the stator core 12 by distributed winding.

  Further, the stator coil 40 is fixed to the stator core 12 in a state where the stator coil 40 is wound around the teeth 14. At this time, the varnish is impregnated between the stator core 12 and the stator coil 40, for example, by dropping the varnish from above the stator core 12 and the stator coil 40, and solidifying.

  The stator cuff 30 is not held by being held by the first jig and the second jig from both sides in the radial direction, but is held by pressing each stator cuff 30 from the upper side with a jig having a plurality of thin rod-like portions. May be. The second stator cuffs 60 may also be held by pressing the second stator cuffs 60 from below with a jig having a plurality of thin rod-like portions.

  Further, the positional relationship in the vertical direction of FIG. 2 in the above description may be reversed. If the teeth 14 can be strongly clamped in the circumferential direction by the two legs 32 of the stator cuff 30, the step of holding the stator cuff 30 with a jig when the conductor segment 43 is inserted into the slot 15 is omitted. You can also

  According to the stator 10 of the present embodiment, the circumferential end portions 53a and 53b of the insulating sheet 50 are arranged along one axial end surface of the teeth 14 of the stator core 12, and the axial end end surface of the teeth 14 and the stator cuff 30 The circumferential end portions 53a and 53b are sandwiched. Accordingly, it is possible to suppress the insulating sheet 50 in the slot 15 from being displaced from a desired position when the conductor segment 43 is inserted into the slot 15. In particular, when the conductor segment 43 is inserted from one side in the axial direction of the slot 15 (upper side in FIG. 2) to the other side (lower side in FIG. 2) as indicated by an arrow α in FIG. Even when the insulating sheet 50 is dragged in the insertion direction α, the core end surface arrangement portion 53 functions as a stopper. And the core end surface arrangement | positioning part 53 is latched by the axial direction one end surface of the stator core 12. As shown in FIG. As a result, the displacement of the insulating sheet 50 can be more effectively suppressed.

  Further, since the stator cuff 30 is disposed outside the one end surface in the axial direction of the teeth 14, the conductor segment 43 does not come into contact with one end in the axial direction of the stator core 12 when the conductor segment 43 is inserted into the slot 15. As a result, the conductor segment 43 can be prevented from being damaged by one end in the axial direction of the stator core 12.

  Further, in the embodiment, it is necessary to provide the bending start point of the conductor segment 43 at a position greatly deviated from the axial end of the stator core 12 so that the conductor segment 43 does not contact the insulating sheet 50 and is not displaced. There is no. For this reason, since the axial length of the coil end of the stator coil 40 can be reduced, the overall size of the stator 10 can be reduced.

  Further, as a comparative example, there is also a configuration in which the displacement of the insulating sheet 50 is prevented only by locking the end portion of the insulating sheet 50 that is bent at one end in the axial direction to the one end in the axial direction of the stator core 12 without providing the stator cuff. Conceivable. In this comparative example, since it is necessary to increase the engagement strength with respect to the stator core 12 at the end portion of the insulating sheet 50 formed by bending, there is a disadvantage that the area of the end portion formed by bending is increased. In the embodiment, since the circumferential end portions 53 a and 53 b of the insulating sheet 50 are sandwiched between the stator cuff 30 and the teeth 14, it is not necessary to excessively increase the area of the core end surface arrangement portion 53. When the stator cuff is not provided as in the comparative example, the conductor segment 43 may come into contact with one axial end of the stator core 12 and be damaged when the conductor segment 43 is inserted into the slot 15. Such an inconvenience does not occur in the embodiment.

  In addition, since the stator cuff 30 has the two leg portions 32 inserted into the slots 15 on both sides of the tooth 14, the circumferential displacement of the stator cuff 30 can be suppressed. The stator cuff 30 can be formed in the same manner as the second stator cuff 60 (FIG. 5) by omitting the legs 32.

  FIG. 6 is a perspective view showing another example of the insulating sheet 50. The insulating sheet 50 of the present example has a first circumferential end 54, a second circumferential end 55, and a radial end 56 that are separated at one axial end (upper end in FIG. 6). The first circumferential end 54 and the second circumferential end 55 are formed in the radial direction by the radial length of the first axial surface portion 51 a and the second axial surface portion 51 b that form the in-slot arrangement portion 51. The The radial end portion 56 is formed in the circumferential direction by the length in the circumferential direction of the connecting surface portion 51 c that forms the in-slot arrangement portion 51. The first circumferential end 54 and the second circumferential end 55 are arranged along one axial end surface of the adjacent teeth 14, and are sandwiched between the teeth 14 and the stator cuff 30. The radial end 56 is disposed along one axial end surface of the yoke 13.

  Such an insulating sheet 50 in this example is formed by forming axial incisions at two positions on one axial end of a single planar material, and the first material forming method described in FIG. It can be formed similarly. As a result, the manufacturing cost can be reduced. Other configurations and operations are the same as those shown in FIGS.

  In the above description, a case has been described in which a plurality of separated stator cuffs 30 are arranged on the outer side of one end surface in the axial direction of the plurality of teeth 14. On the other hand, the stator cuffs disposed on the outer side of one end surface in the axial direction of each tooth 14 may be integrally connected as one component. For example, the stator cuff member may have a configuration including an outer annular portion disposed outside one axial end surface of the yoke 13 of the stator core 12, an inner annular portion disposed inside the outer annular portion, and a plurality of cuff teeth. . The plurality of cuff teeth are connected radially between the outer annular portion and the inner annular portion. Each cuff tooth is disposed outside one end surface in the axial direction of the corresponding tooth 14 of the stator core 12. The present invention can also be applied to a configuration using such a stator cuff. For example, the circumferential end portions 53 a and 53 b (FIG. 3) or the circumferential end portions 54 and 55 (FIG. 6) at one end in the axial direction of the insulating sheet 50 are sandwiched between the cuff teeth and the teeth 14 of the stator core 12.

  DESCRIPTION OF SYMBOLS 10 Rotating electrical machine stator, 12 Stator core, 13 York, 14 teeth, 15 slots, 30 Stator cuff, 31 Main part, 32 Leg part, 40 Stator coil, 41u U-phase coil, 41v V-phase coil, 41w W-phase coil, 42 segment coil , 43 Conductor segment, 44 Leg part, 45 Connection part, 46 Conductor wire, 47 Insulating film, 48 Axial end part, 49u1 U-phase first connection coil element, 49u2 U-phase second connection coil element, 50 Insulation sheet, 51 In-slot arrangement part, 51a First axial surface part, 51b Second axial surface part, 51c Connection surface part, 51d, 51e, 51f Adhesive allowance, 53 Core end face arrangement part, 53a First circumferential end part, 53b Second circumference Direction end, 53c connecting portion, 54 first circumferential end, 55 second circumferential end, 56 diameter Kotan unit, 60 second Sutetakafusa.

Claims (1)

An annular yoke, teeth projecting radially from a plurality of circumferential positions on the inner circumferential surface of the yoke, and a stator core having a plurality of slots formed between the adjacent teeth;
A resin stator cuff disposed on the outside of one end surface in the axial direction of the teeth;
A plurality of conductor segments wound around the teeth through the slot, the segments formed by connecting a plurality of conductor segments in which a portion protruding outward from one axial end of the stator core contacts the stator cuff Coils,
An axial surface portion disposed along a circumferential side surface of the teeth, and a circumferential end portion disposed along one axial end surface of the teeth and sandwiched between the axial end surface of the teeth and the stator cuff. A rotating electrical machine stator comprising an insulating sheet.

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