JP2014064384A - Stator - Google Patents

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Publication number
JP2014064384A
JP2014064384A JP2012207882A JP2012207882A JP2014064384A JP 2014064384 A JP2014064384 A JP 2014064384A JP 2012207882 A JP2012207882 A JP 2012207882A JP 2012207882 A JP2012207882 A JP 2012207882A JP 2014064384 A JP2014064384 A JP 2014064384A
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Prior art keywords
conductor
coated
stator
segment
coil
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JP2012207882A
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JP6056317B2 (en
Inventor
Keiji Takizawa
敬次 滝澤
Akihito Koike
昭仁 小池
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Toyota Motor Corp
トヨタ自動車株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

An object of the present invention is to suppress the occurrence of cracks in an insulating film.
A stator in which each segment coil is attached to each slot of a stator core, and the segment coil is formed in a substantially U shape with a coated conductor 31 in which a sheath 36 as an insulating member is coated around a conductor body 35. The conductor segment 30 is inserted into each slot, and a portion of the covered conductor 31 protruding from the slot is bent so that the covered conductor 31 forms a predetermined coil. The end conductors 32 and 33 that are narrower than the conductor main body 35 are brought into contact with each other, and the end conductors 32 and 33 are welded to each other. Each corner is cut out to form a chamfer 40.
[Selection] Figure 5

Description

  The present invention relates to a structure of a stator, and more particularly to an insulating structure of a segment coil attached to a slot of the stator.

  In a motor for an electric vehicle such as a hybrid vehicle, the filling rate of the conductor wire inside the slot, that is, the conductor cross-sectional area (conductor space factor) occupying the predetermined cross-sectional area of the slot is increased, and the alternating current due to the skin effect and eddy current is increased. There is a demand for low resistance. For this reason, for example, the coated conductor having a rectangular cross section is bent into a substantially U shape and then inserted into the slot, and then bent so that the uncoated tip portions projecting from the end face of the slot are brought close together. A segment coil that is connected by welding to form a coil is often used (for example, see Patent Document 1).

  In addition, a method has been proposed in which the cross-sectional area of the conducting wire of the welded part at the tip is reduced to half the cross-sectional area of the other part to reduce the heat input of the welded part and to reduce the deterioration of the coating during welding. (For example, refer to Patent Document 2). Further, this document describes that after welding, an insulating member is attached to the surface of the welded portion or an insulating coating is performed to ensure insulation between the conductors.

JP 2006-333562 A JP 2000-164043 A

  By the way, in the segment coils described in Patent Documents 1 and 2, when the coated conductor is bent so that the uncoated tip portions are brought together, the coating peels off from the conductor in the vicinity of the tip portion where the bending stress is concentrated. May end up. When welding was performed in this state and insulation coating was performed thereon, there was a problem that the insulation film was cracked due to the coating peeled off from the metal surface.

  Then, an object of this invention is to suppress generation | occurrence | production of the crack of an insulating film.

  The stator according to the present invention is a stator in which each segment coil is attached to each slot of the stator core, and the segment coil is a conductor segment in which a coated conductor having a conductor body covered with an insulating member is formed in a substantially U shape. Is inserted into each slot, and a portion of the coated conductor protruding from the slot is bent so that the coated conductor forms a predetermined coil, and then projected in the longitudinal direction from each coated end of the coated conductor, and the conductor The tip conductors that are thinner than the main body are brought together and the tip conductors are welded to each other, and each corner of each coated end on the bending outer periphery side of the coated conductor is cut out. And

  In the stator according to the present invention, a plurality of the segment coils are arranged in each slot in the radial direction, and only the segment coil of at least one stage from the inner peripheral side is provided on each of the coated ends on the bent outer peripheral side of the coated conductor. It is also preferable that each corner is notched.

  In the stator of the present invention, it is also preferable that each corner portion of each coated end on the bending inner peripheral side of the coated conductor is notched.

  In the stator according to the present invention, the cutouts at the respective corners are also preferably formed by cutting out the conductor body and the covering at the corners.

  In the stator of the present invention, it is also preferable that each corner portion of each coated end is cut out over the entire circumference of the coated conducting wire.

  The present invention has an effect that the generation of cracks in the insulating film can be suppressed.

It is a perspective view which shows the stator in embodiment of this invention. It is a conceptual diagram which shows the assembly process of the segment coil of the stator in embodiment of this invention. It is a conceptual diagram which shows the assembly process of the segment coil of the stator in embodiment of this invention. It is sectional drawing which shows the welding part of the segment coil of the stator in a prior art. It is sectional drawing which shows the welding part of the segment coil of the stator in embodiment of this invention. It is sectional drawing which shows the welding part of the segment coil of the stator in other embodiment of this invention. It is sectional drawing which shows the welding part of the segment coil of the stator in other embodiment of this invention. It is sectional drawing which shows the welding part of the segment coil of the stator in other embodiment of this invention. It is sectional drawing which shows the welding part of the segment coil of the stator in other embodiment of this invention. It is a top view which shows arrangement | positioning of the welding part of the segment coil of the stator in other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A stator according to an embodiment of the present invention is circumferentially arranged around a rotor that rotates around a central axis. For example, a general rotary motor, or a rotating electrical machine such as a motor generator or a generator It is used for.

  As shown in FIG. 1, the stator 10 of the present embodiment includes a substantially cylindrical yoke 13, a stator core 12 having a plurality of teeth 15 extending from the inner peripheral surface of the yoke 13 toward the radial direction of the stator 10, and the stator core 12 and a stator coil 16 attached to 12. The teeth 15 are arranged at intervals in the circumferential direction of the stator core 12, and a space between the teeth 15 forms a slot 14. A plurality of segment coils 20 are arranged in each slot 14, and the plurality of segment coils 20 constitute a stator coil 16 as a whole.

  Next, a method for assembling the stator coil 16 using the segment coil 20 will be described with reference to FIGS. In the following description, a process of assembling the two conductor segments 30a and 30b will be described. As shown in FIG. 2A, a stator core 12 is prepared in which electromagnetic steel plates are laminated and slots 14 and teeth 15 are formed on the inner peripheral side. As shown in FIG. 2B, the two conductor segments 30a and 30b are formed by bending the coated conducting wires 31a and 31b into a substantially U shape. As shown in FIG. 4, the coated conductors 31a and 31b are obtained by covering the surface of the conductor body 35 with a coating 36 of an insulating member such as enamel. As shown in FIG. 2B, the open ends (covered ends) of the covered conductors 31a and 31b are thinner than the conductor main body 35 of the covered conductors 31a and 31b and are not covered with the end conductors 32a, 33a, 32b, 33b protrudes.

  Next, as shown in FIG. 2 (c), the two conductor segments 30a and 30b are moved from the end conductors 32a to 33b side to the axial direction of the slot 14 of the stator core 12 from the lower side to the upper side as indicated by arrows. Insert into. FIG. 2C is a developed view of the stator core 12 as viewed from the inner peripheral side. The slot 14 into which the conductor segments 30a and 30b are inserted is not the adjacent slot 14 but, for example, a slot 14 that is spaced apart like the slots 141 and 142 shown in FIG. The distance W between the U-shaped open ends of the conductor segments 30a and 30b is the distance between the slots 14 into which the conductor segments 30a and 30b are inserted. As shown in FIG. 2C, when the insertion is completed, each of the tip conductors 32a to 33b and a part of each of the covered conductors 31a and 31b protrudes from the end face 121 or the slot 14 of the stator core 12.

  Next, as shown in FIG. 2D, the coated conductors 31a and 31b protruding from the stator core 12 or the slot 14 of the conductor segments 30a and 30b are bent. FIG. 2D is a developed view of the stator core 12 as seen from the inner peripheral side, as in FIG. As shown in FIG. 2 (d), each of the covered conductors 31 a and 31 b is bent sideways in the direction of closing the U-shaped open end in the vicinity of the end surface 121 of the stator core 12, and then each of the tip conductors 32 a to 33 b. It is bent in the vertical direction from the end surface 121 of the stator core 12 in the vicinity. Thus, by bending each covered conducting wire 31a, 31b, the tip conductors 32a-33b that form the segment coil 20 according to a predetermined combination are brought together. When the left end conductor 32a of the front conductor segment 30a shown in FIG. 2B and the right end conductor 33b of the back conductor segment 30b shown in FIG. 2B are TIG welded, one segment is obtained. A coil 20 is formed. A location where TIG welding is performed becomes a welded portion 34. Hereinafter, similarly, when the left end conductor of the front conductor segment and the right end conductor of the rear conductor segment are sequentially welded and connected, a coil composed of a plurality of segment coils 20 that go around the teeth 15 302 is configured.

  On the outermost peripheral side and the innermost peripheral side of each slot 14, a connecting wire 301 is formed that connects between the coils 302 that rotate around the teeth 15 described with reference to FIG. 2. FIG. 3B shows the conductor segments 30c and 30d inserted on the outermost peripheral side or the innermost peripheral side. The conductor segment 30c is an outermost or innermost conductor segment inserted into the same slot 14 as the conductor segments 30a and 30b described in FIGS. 2B to 2D, and the conductor segment 30d is For example, as shown in slots 143 and 144 in FIG. 1, conductor segments inserted into slots of the same phase that are separated from the slots 141 and 142 are shown. As described with reference to FIG. 2, the conductor segments 30 c and 30 d are formed from the open ends of the covered conductors 31 a and 31 b in which the surface of the conductor main body 35 shown in FIG. 4 is covered with an insulating member coating 36 such as enamel. Uncovered tip conductors 32c, 33c, 32d, and 33d that are thinner than the conductor main body 35 of the coated conductors 31c and 31d protrude.

  As shown in FIG. 3C, the conductor segment 30c and the conductor segment 30d are inserted into the slots 14 that are spaced apart from each other. FIG. 3C is a developed view of the stator core 12 as seen from the inner peripheral side, similarly to FIG. 2C. As described above with reference to FIG. 2C, when the insertion is completed, each of the tip conductors 32 c to 33 d and a part of each of the covered conductors 31 c and 31 d protrude from the end face 121 or the slot 14 of the stator core 12. .

  Next, as shown in FIG. 3D, the coated conductors 31c and 31d protruding from the end face 121 or the slot 14 of the stator core 12 of the conductor segments 30c and 30d are bent. FIG. 3D is a developed view of the stator core 12 as seen from the inner peripheral side, similarly to FIG. 3C. The side to which the tip conductors 32c and 33d of each coated conductor 31c and 31d are connected is bent sideways in the direction of closing the U-shaped open end in the vicinity of the end surface 121 of the stator core 12, and then each tip conductor 32c and It is bent in the vertical direction from the end surface 121 of the stator core 12 in the vicinity of 33d. By bending in this way, the tip conductor 32c on the left side of the conductor segment 30c shown in FIG. 3 (d) is brought into contact with the tip conductor on the right side of the conductor segment adjacent to the inner peripheral side or the outer peripheral side, It is connected to a coil 303 comprising a plurality of segment coils 20 that are welded and go around the teeth 15. Similarly, the right end conductor 33d of the conductor segment 30d is brought into contact with the left end conductor of the other conductor segment adjacent to the inner periphery side or the outer periphery side, and the tip end is welded to go around the other teeth 15. Are connected to another coil 304 comprising a plurality of segment coils 20. Each TIG welded portion becomes a welded portion 34.

  Further, as shown in FIG. 3D, the side where the end conductors 33c and 32d of the respective coated conductors 31c and 31d are connected is in the direction of opening the U-shaped open end in the vicinity of the end surface 121 of the stator core 12. After being bent sideways, it is bent in the vertical direction from the end face 121 of the stator core 12 in the vicinity of the respective tip conductors 33c and 32d. By bending in this way, the tip conductors 33c and 32d are brought together. Then, the right end conductor 33c of the conductor segment 30c shown in FIG. 3C and the left end conductor 32d of the conductor segment 30d are welded by TIG welding or the like to form the welded portion 34. As a result, a transition conductor 301 that connects the coil 303 that rotates around the tooth 15 including the conductor segment 30c and the coil 304 that rotates around the other tooth 15 including the conductor segment 30d is configured. A stator coil 16 as shown in FIG. 1 is configured by the coils 303 and 304 that go around the teeth 15 and a plurality of transition conductors 301 that connect the coils. The surface of each welded portion 34 of the segment coil 20 is subjected to an insulation coating in which an insulating paint or a powder of an insulating member is applied.

  Next, the configuration in the vicinity of the tip conductors 32 and 33 of the conductor segment 30 according to the prior art will be described in detail with reference to FIG. As described above, the conductor segment 30 is formed from the conductor body 35 of the covered conductor 31 from the open end side (covered end side) of the covered conductor 31 in which the surface of the conductor body 35 is covered with the coating 36 of an insulating member such as enamel. Further, the tip conductor 32 that is not covered is projected. The tip conductor 32 is welded to the tip conductor 33 of another conductor segment to form a welded portion 34. An insulating film 37 in which an insulating member is powder-coated is formed on the outer surfaces of the welded portion 34, the tip conductors 32 and 33, the conductor main body 35, and the coating 36. The powder insulating member is thickly attached to the respective surfaces of the metal tip conductors 32 and 33, the welded portion 34, and the end surface 39 of the conductor body 35, the surface of which becomes high during powder coating, but the metal surface is exposed. In addition, it does not adhere to the end surface 38 or the outer surface of the coating 36 such as enamel which does not reach a high temperature during powder coating.

As described above, the covered conductor 31 of the conductor segment 30 is bent from the horizontal direction to the vertical direction in the vicinity of the tip conductor 32. During the bending process, a tensile force is applied to the conductor body 35 and the coating 36 on the outer periphery side of the bending, and conversely, a compression force is applied to the conductor body 35 and the coating 36 on the inner side of the bending. When the bending radius is small, as shown in FIG. 4, the coating 36 is peeled off from the surface of the conductor body 35 in the vicinity of the tip on the outer periphery side of the bending, and the surface between the surface of the conductor body 35 and the coating 36 is high. in some cases it can H 1 of the gap 51 is. When the insulating member is powder-coated in such a state, a stress may be applied to the insulating film 37 formed by the powder coating and the crack 50 may be generated. The crack 50 of the insulating film 37 reduces the insulation between the adjacent segment coil 20 or the welded part 34 and reduces the withstand voltage of the motor.

Therefore, in the present embodiment, as shown in FIG. 5, the corner of the tip end of the coated conductor 31 on the bending outer peripheral side, that is, the corner of the end surface 38 of the coating 36 of the coated conductor 31 is cut out to form a chamfer 40. The chamfer 40 shown in FIG. 5 is a flat surface that is formed by cutting out the corners of the covering 36 and the corners of the conductor body 35 from the end face 39 of the conductor body 35 over the height H 2 . height H 2 of up to the upper end of the end surface 381 of the notched coating 36 from the end face 39 is larger than the height H 1 of the gap 51 described above with reference to FIG. 4. As a result, the coating 36 in the range of the height H 2 that is equal to or higher than the height H 1 at which the coating 36 is peeled off from the surface of the conductor main body 35 due to the tensile stress applied to the coating 36 during bending is cut off, and the height H in FIG. 1 can be eliminated. Then, by exposing the metal surface of the conductor main body 35 on the surface of the chamfer 40, the insulating film 37 having a thickness larger than that of the insulating film 37 formed on the outer surface of the coating 36 is formed on the plane of the chamfer 40. Can do. For this reason, the thin powder coating adhered to the outer surface of the coating 36 such as enamel from the thick powder coating insulating film 37 adhering to each surface of the welded portion 34, the end surface 39 of the conductor main body 35, and the tip conductors 32 and 33. The change in the thickness of the insulating film 37 over the insulating film 37 can be moderated. As a result, the concentration of stress on the insulating film 37 can be suppressed, and the generation of cracks 50 as shown in FIG. 4 in the insulating film 37 can be suppressed. Further, in the present embodiment, the height H 2 is described as greater than the height H 1 of the gap 51 described above with reference to FIG. 4, the height H2 is the height H1 and substantially equal height It may be. In this case, the generation of the crack 50 can be suppressed while minimizing the size of the chamfer 40.

Another embodiment of the present invention will be described with reference to FIG. Parts similar to those of the embodiment described with reference to FIG. 5 are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, the chamfering 40 of the embodiment described with reference to FIG. 5 is a cylindrical surface 41, and the end surface of the coating 36 chamfered in a cylindrical shape from the end surface 39 of the conductor main body 35 shown in FIG. The height H 3 up to the upper end of 381 is larger than the height H 1 shown in FIG. Similarly to the embodiment described with reference to FIG. 5, the present embodiment can eliminate the occurrence of the peeling portion of the coating 36 indicated by the height H <b> 1 in FIG. 4, and the surface of the welded portion 34, the conductor main body 35, and the like. The thickness of the insulating film 37 from the thick powder-coated insulating film 37 adhering to the thin film to the outer surface of the coating 36 such as enamel is moderated by changing the thickness of the insulating film 37 gently. Concentration of stress can be suppressed, and generation of cracks 50 as shown in FIG. 4 in the insulating film 37 can be suppressed.

Another embodiment of the present invention will be described with reference to FIG. Parts similar to those in the embodiment described with reference to FIG. In this embodiment, the chamfer 40 of the embodiment described with reference to FIG. 5 is a stepped portion 43, and the stepped portion 43 is formed at the corner of the end surface 39 of the conductor body 35 as shown in FIG. 7. It is provided and has a vertical surface 43a and a horizontal surface 43d. The vertical surface 43a and the end surface 39 of the conductor main body 35 are smoothly connected by a small cylindrical surface 43b, and chamfers 43e are provided at the corners on the bending outer peripheral side of the horizontal surface 43d and the coated conductor 31. . The height H 4 to the upper end of the end surface 381 of the chamfered covered 36 of the stepped portion 43 from the end face 39 of the conductor body 35 is larger than the height H 1 of FIG. 2. This embodiment is also similar to the embodiment described with reference to FIG. 5, it is possible to eliminate the occurrence of a portion peels off coating 36 shown by the height H 1 of FIG. 4, the surface of such welds 34 and conductor body 35 The change in thickness of the insulating film 37 from the thick powder coating insulating film 37 adhering to the surface to the thin powder coating insulating film 37 adhering to the surface of the coating 36 such as enamel is stepped. As a result, the concentration of stress on the insulating film 37 can be suppressed, and the generation of cracks 50 as shown in FIG. 4 in the insulating film 37 can be suppressed.

  Another embodiment of the present invention will be described with reference to FIG. Parts similar to those of the embodiment described with reference to FIG. 5 are denoted by the same reference numerals, and description thereof is omitted. In the embodiment described with reference to FIG. 5, the chamfer 40 is also provided at the corner portion of the coated conductor 31 on the inner peripheral side of the bending. When the bending radius is small, the coating 36 near the tip of the conductor main body 35 may be peeled off from the surface of the conductor main body 35 due to the compressive stress acting on the coating 36 on the inner peripheral side of the bending as well as the outer peripheral side of the bending. In the present embodiment, since the chamfer 40 is provided at the corner of the coated end surface of the coated conductor 31 on the inner peripheral side of the bending in addition to the outer peripheral side of the bending, the insulating film 37 can be effectively applied even when the bending radius is small. The occurrence of cracks 50 as shown in FIG. 4 can be suppressed.

Another embodiment of the invention will be described with reference to FIG. Parts similar to those of the embodiment described with reference to FIG. 5 are denoted by the same reference numerals, and description thereof is omitted. The present embodiment is that the metallic surface of the conductor body 35 by cutting a range of coating 36 of a height H 5 from the end surface 39 of the conductor body 35 of the coated conductive wire 31 exposed to the entire circumference. That is, the corner portion of the end surface 38 of the covering 36 is cut out over the entire circumference of the covered conducting wire 31. The height H 5 in the notches 44 shown in FIG. 9 is larger than the height H 1 of FIG. 4. In the present embodiment, the surface of the conductor main body 35 is exposed by cutting out the cover 36 in the range of the height H 5 equal to or higher than the height H 1 at which the coating 36 shown in FIG. 4 is peeled off from the surface of the conductor main body 35. and to eliminate the occurrence of a portion peels off coating 36 shown by the height H 1. Further, in the present embodiment, the metal surface is exposed and the powder is attached to the surface of the cutout portion 44 where the surface becomes high during powder coating to form a thick insulating film 37, thereby The stress concentration of the insulating film 37 is moderated by relaxing the change in the thickness of the insulating film 37 from the end surface 39 to the surface of the notch 44 and the surface of the coating 36, and a crack 50 as shown in FIG. 4 is generated. It is possible to effectively suppress this.

  Another embodiment of the present invention will be described with reference to FIG. As shown in FIG. 10, the welded portion 34 of the segment coil 20 is formed side by side in the radial direction according to the arrangement of the segment coil 20 in the slot 14. For this reason, the bending radii of the covered conducting wires 31a to 31d on the open end side of the substantially U-shaped conductor segments 30a to 30d described with reference to FIGS. 2 and 3 are segments arranged on the inner peripheral side of the stator core 12. The coil 20 is smaller than the segment coil 20 disposed on the outer peripheral side of the stator core 12. For this reason, the ratio of occurrence of the crack 50 in the insulating film 37 is such that the vicinity of the welded portion 34 of the segment coil 20 on the inner peripheral side of the stator core 12 is closer to the vicinity of the welded portion 34 of the segment coil 20 on the outer peripheral side of the stator core 12. growing.

  Therefore, this embodiment will be described with reference to FIG. 5 at the corner of the coated end of the coated conductor 31 in the vicinity of the welded portion 34 of the two-stage segment coil 20 on the inner peripheral side of the stator core 12 as shown in FIG. As described above, a chamfer 40 is provided. Further, the corner portion of the coated end of the coated conducting wire 31 in the vicinity of the welded portion 34 of the two-stage segment coil 20 on the inner peripheral side of the stator core 12 may be shaped as described with reference to FIGS. The present embodiment can reduce the number of processing of the coated end of the coated conductive wire 31, and can effectively suppress the generation of the crack 50 of the insulating film 37 at a low cost. In the present embodiment, the chamfer 40 is provided at the corner of the coated end of the coated conductor 31 in the vicinity of the welded portion 34 of the two-stage segment coil 20 on the inner peripheral side of the stator core 12, but the chamfer 40 is provided. The chamfer 40 is provided at the corner of the coated end of the coated conductor 31 in the vicinity of the welded portion 34 of the segment coil 20 of three or more stages on the inner circumferential side. It is good as well.

  10 stator, 12 stator core, 13 yoke, 14, 141-144 slot, 15 teeth, 16 stator coil, 20 segment coil, 30, 30a-30d conductor segment, 31, 31a-31d covered conductor, 32, 33, 32a-33d Tip conductor, 34 Welded part, 35 Conductor body, 36 Cover, 37 Insulating film, 38, 39, 121, 381 End face, 40 Chamfer, 41, 43b Cylindrical face, 43 Step part, 43a Vertical face, 43d Horizontal face, 43e Chamfer, 44 Notch, 50 crack, 51 gap, 301 transition conductor, 302-304 coil.

Claims (5)

  1. A stator in which each segment coil is attached to each slot of the stator core,
    The segment coil is formed by inserting a conductor segment, in which a coated conductor coated with an insulating member around a conductor main body into a substantially U shape, is inserted into each slot so that the coated conductor forms a predetermined coil. After bending a part of the protruding coated conductor, it protrudes in the longitudinal direction from each coated end of the coated conductor, and is configured by bringing the tip conductors thinner than the conductor body together and welding the tip conductors together,
    Each corner of each coated end on the bent outer peripheral side of the coated conductor is notched,
    Stator characterized by.
  2. The stator according to claim 1,
    In each slot, the segment coils are arranged in multiple stages in the radial direction,
    Only at least one stage of the segment coil from the inner peripheral side, each corner of each coated end on the bent outer peripheral side of the coated conductor is cut out,
    Stator characterized by.
  3. The stator according to claim 1 or 2,
    Each corner of each coated end on the inner bending side of the coated conductor is cut away,
    Stator characterized by.
  4. The stator according to any one of claims 1 to 3,
    The notch at each corner is cut out from the conductor body and the covering at the corner,
    Stator characterized by.
  5. The stator according to claim 3,
    Each corner of each coated end is cut out over the entire circumference of the coated conducting wire,
    Stator characterized by.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016158345A (en) * 2015-02-24 2016-09-01 日立オートモティブシステムズ株式会社 Stator for rotary electric machine
JP2017192194A (en) * 2016-04-12 2017-10-19 本田技研工業株式会社 Conductor unit for rotary electric machine and rotary electric machine
WO2018011637A1 (en) * 2016-07-14 2018-01-18 Hitachi Automotive Systems, Ltd. Stator for rotating electrical machine and rotating electrical machine
CN108233575A (en) * 2016-12-14 2018-06-29 丰田自动车株式会社 Electric rotating machine
EP3346586A4 (en) * 2015-09-02 2019-04-17 Hitachi Automotive Systems, Ltd. Stator coil, stator equipped with same, and rotary electric machine equipped with this stator

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JP2001238385A (en) * 2000-02-23 2001-08-31 Mitsubishi Electric Corp Stator of ac generator and its manufacturing method
JP2006317412A (en) * 2005-05-16 2006-11-24 Totoku Electric Co Ltd Probing stylus having insulating film, and manufacturing method thereof
JP2006333562A (en) * 2005-05-24 2006-12-07 Hitachi Ltd Bonding electric wire and processing method of bonding electric wire, stator in dynamo-electric machine and manufacturing method of stator in dynamo-electric machine, and bonding electric wire manufacturing apparatus
JP2012090433A (en) * 2010-10-20 2012-05-10 Hitachi Industrial Equipment Systems Co Ltd Electric appliance having joint part insulation structure

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Publication number Priority date Publication date Assignee Title
JPS59162750A (en) * 1983-03-03 1984-09-13 Mitsubishi Electric Corp Insulating method of fully impregnated-coil of rotary electric machine
JP2000164043A (en) * 1998-09-22 2000-06-16 Denso Corp Electric wire for joining and method for joining the same
JP2000295821A (en) * 1999-04-02 2000-10-20 Denso Corp Disposition of pair lead wires, and method of joining ends thereof, and manufacture of winding of rotating machine using the same
JP2001238385A (en) * 2000-02-23 2001-08-31 Mitsubishi Electric Corp Stator of ac generator and its manufacturing method
JP2006317412A (en) * 2005-05-16 2006-11-24 Totoku Electric Co Ltd Probing stylus having insulating film, and manufacturing method thereof
JP2006333562A (en) * 2005-05-24 2006-12-07 Hitachi Ltd Bonding electric wire and processing method of bonding electric wire, stator in dynamo-electric machine and manufacturing method of stator in dynamo-electric machine, and bonding electric wire manufacturing apparatus
JP2012090433A (en) * 2010-10-20 2012-05-10 Hitachi Industrial Equipment Systems Co Ltd Electric appliance having joint part insulation structure

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