JP5048438B2 - Rotating electric machine and its stator - Google Patents

Description

  The present invention relates to a rotating electrical machine such as a generator and an electric motor, and more particularly to a joint structure between coil segments of a stator winding mounted in a slot formed in a stator core.

  For example, in the field of rotating electrical machines such as in-vehicle generators and motors used in automobiles, the space factor in the slots of the stator core is set to meet demands for small size, light weight, high efficiency, and high output. A rotating electric machine has been proposed in which the cross-sectional area of the electric conductor (coil segment) is increased.

  As described in Patent Documents 1 and 2 and the like, in this type of rotating electrical machine, a stator core having a plurality of slots, and a plurality of coil segments mounted in each slot to form a stator winding, The joined portions of the coil segments are adjacently joined outside the slot. Since the coil segments to be joined are coil segments in different slots, the joined portions (one end of the coil segment) that are exposed to the outside of each slot are bent in a predetermined pattern so as to be close to each other and adjacent to each other. Twisted.

  In patent document 1, the to-be-joined part of the coil segment used as joining object is joined via the molten metal whose melting | fusing point is lower than a coil segment. Thereby, the amount of heating at the time of joining the coil segments is reduced to prevent damage to the insulation coating of the coil segments.

  In Patent Document 2, in the method of manufacturing a winding of a rotating electrical machine, a step of inserting a plurality (even number) of electrical conductors (coil segments) into slots formed in a stator core, and one end of those coil segments ( The insulation coating on the part exposed outside the slot is peeled off so that each end (joined part) approaches the direction of the target counterpart of the other slot to be joined (coil segment joined part coming out of the slot). A process of deforming is disclosed. The deformation process in the radial direction of the coil segment is performed in order to prevent poor welding (joining failure) of the coil segment to be joined. In addition, the coil segment deforming step is performed by deforming the outside-slot exposed portions (joined portions) of the coil segments mounted in the same slot inward. At this time, a thin plate is interposed between the exposed portions of the coil segments so that the coil segment portions other than the deformed portions do not contact each other. The thin plate is removed after the deformation step.

JP2002-119003 JP2004-254368

  In the case where the joined portions of the coil segments are joined by inserting a molten metal (joining member) having a low melting point, there is an advantage that thermal damage of the insulating coating of the coil segments can be prevented. However, since the inserted joining member is melted, the interval between the adjacent portions outside the slots of the coil segments is narrowed. The narrower the interval, the more likely that a short circuit will occur if the insulation coating or the like is damaged in an adjacent portion. Therefore, consideration for preventing a short circuit is desired.

  As in Patent Document 2, in the method of manufacturing a stator winding, the method of interposing a thin plate in the deformation process of the joined portion (one end) of the coil segment can maintain the interval between adjacent portions of the coil segments. In this manufacturing method, when inserting or removing a thin plate between coil segments, it is necessary to take care not to damage the insulating coating of the coil segments. Moreover, it is necessary to consider so that the to-be-joined part of a coil segment may not leave | separate at the time of the operation | work which extracts a thin plate.

  The present invention proposes a coil segment joining method that replaces the conventional technique as described above, simplifies the manufacturing process of the stator winding, and improves the joining property of the joined portion of the coil segment and the reliability of short circuit prevention. An object of the present invention is to provide a rotating electrical machine that can be used.

  In order to achieve the above object, the present invention is basically configured as follows.

  That is, a stator of a rotating electrical machine to be applied includes a stator core having a plurality of slots, and a plurality of coil segments mounted in the respective slots to form a stator winding. The joined portions of the coil segments are joined adjacent to each other outside the slot. In the present invention, a conductive spacer is provided between the bonded portions of the coil segments to open a space between adjacent portions other than the bonded portions of the coil segments. The part and the spacer are joined together by welding or a joining member.

  In the above configuration, for example, in the case where the bonded portion of the coil segment and the spacer are directly bonded by welding, the insulating coating of the bonded portion of the coil segments having the insulating coating is removed in advance. A spacer is interposed between the joined parts, and the coil segment joined part and the spacer are connected to, for example, TIG (Tungsten Inert Gas) welding, laser welding, electron beam welding, plasma welding, gas welding, MIG (Metal Inert Gas). ) Joining through appropriate welding means such as welding.

  Moreover, when joining the to-be-joined part of a coil segment and a spacer via a joining member (it may be called a "joining auxiliary material") instead of direct welding, as a joining member, spacer and A metal having a melting point lower than that of the coil segment is used. The joining member is inserted together with the spacer between the joined ends when the coil segments are joined to each other, or the joining member is provided by previously plating the joining member on the spacer. This joining member is pressurized with, for example, an electrode provided on a welding head of a resistance welding machine via a coil segment. Further, the joining member is energized through the welding electrode with a welding power source. As a result, the joining member generates heat by electric resistance and melts, whereby the joined portion of the coil segment and the spacer are joined.

  Here, the coil segment is usually an electric conductor made of copper, and various cross-sectional shapes such as a quadrangle, a circle, and a polygon can be considered. The spacer is preferably made of any one of copper, copper alloy, iron, iron alloy, aluminum, aluminum alloy, nickel, and nickel alloy. Typical joining members (joining aids) are, for example, brazing material and solder. Moreover, it is not limited thereto, and any metal having a melting point lower than that of the spacer and the coil segment may be used.

  According to the present invention, in the stator of the rotating electrical machine, the coil segments can be reliably joined while maintaining a sufficient insulation interval except for the joined portion of the coil segments, and high-quality joining without a short circuit can be achieved. Also, in the manufacturing process of the stator winding, it is not necessary to insert or pull out a thin plate for preventing contact between the coil segments, and to provide a highly reliable rotating electrical machine by a simple method. Can do.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings.

  First, an example of a stator of a rotating electrical machine to which the present invention is applied will be described with reference to FIGS.

  FIG. 11 is a perspective view showing an example of a stator of an in-vehicle generator, and FIG. 12 is a partially enlarged perspective view in which a segment joining structure according to an embodiment of the present invention is adopted for the stator. FIG. 13 is a partially enlarged perspective view showing a conventional coil segment joining structure as a comparative example.

  In FIG. 11, two coil segments 2 with insulating coatings 4 serving as stator windings are mounted in each slot 90 of the stator core 9. The coil segment 2 includes a coil segment 2a (stator inner coil segment) positioned on the inside of the stator 9 in the radial direction in the slot 90 and a coil segment 2b (stator outer coil segment) positioned on the outer side in the radial direction. In these coil segments 2, a part 2 ′ on the bonded portion side is projected out of the slot, and the insulation coating on the entire periphery of the bonded portion is peeled off.

  Of the coil segments 2, each pair of coil segments to be joined is mounted in different slots 90. Also, in order to form a single-phase or multi-phase stator winding (this example illustrates a three-phase winding), the joined portions of the coil segments are connected outside the slot by a predetermined pattern. Yes. That is, the coil segments 2 (2a, 2b) to be paired between different slots are bent and twisted so that the coil segment portions 2 'protruding out of the slots 90 are arranged next to each other. Of the part 2 ', the parts to be joined are joined. More specifically, the end portions of the stator inner coil segment 12a and the stator outer coil segment 12b are twisted to the left and right from the vicinity where the insulating coating 4 is removed, and the portions where the coil segments intersect and the insulating coating 4 is removed. Launched and standing next to each other.

  In the present invention, as shown in FIG. 12, a spacer 1 is interposed between the joined portions of the coil segments 2 (2a, 2b) (one end portion of the coil segment indicated by hatching), and the coil segments 2a, 2b are covered. The joint portion and the spacer 1 are joined through welding or a joining member.

  Each spacer 1 is for preventing a pair of adjacent coil segment portions 2 ′ outside the slot from contacting each other except for a bonded portion. In addition, the spacing at the intersecting portion i between the coil segments other than the joining partner that intersects with each other by bending the coil segment portions 2 ′ is sufficient to maintain insulation by the cooperation of the spacers 1. .

  Conventionally, such a spacer 1 does not exist, and as shown in FIG. 13, a joined portion of a coil segment 2 (2 a, 2 b) to be joined is a joining member (molten metal) having a melting point lower than that of the coil segment. ) 60 is joined. In the conventional method, since the joining member 60 inserted between the joined portions is melted, the interval between the adjacent portions outside the slots of the coil segments (intersection portion i of the coil segments coming out from different slots) becomes narrow. The narrower the gap, the more likely that a short circuit will occur if the insulation coating or the like is damaged in an adjacent portion.

  The spacer 1 of this embodiment is provided in order to eliminate the possibility of short circuit. For that purpose, as shown in FIG. 12, the spacer 1 is interposed between the joined portions of the stator inner coil segment 2a and the stator outer coil 2b.

  In this example, the stator winding (stator coil) has three-phase output terminals 8a, 8b, and 8c (see FIG. 13).

  Although not shown, the rotor of the rotating electric machine is, for example, a known permanent magnet field type (for example, claw pole type rotor), and the rotor is rotated at both ends by the rotation of the rotor. A cooling fan for generating an air flow is provided.

  Therefore, according to the present example, the insulation interval outside the slot between the coil segments adjacent to the stator is maintained, and air circulation between the coil segments is facilitated, and the cooling efficiency of the coil portion of the rotating electrical machine is improved. Can be made.

  Hereinafter, a specific example of joining the coil segment 2 (2a, 2b) and the spacer 1 will be described.

  FIG. 1 shows a first joining example of the coil segment 2 (2a, 2b) and the spacer 1, and FIG. 1 (a) is a top view of the joining portion as seen from the coil segment end face side. ) Is a front view showing the vicinity of the joint portion of the coil segment.

  The coil segment 2 (2a, 2b) to be joined is made of, for example, a rectangular electric conductor and has an insulating coating 4. In FIGS. 1A and 1B, only a pair of portions protruding outside the slot of the coil segment 2 are shown.

  The insulating coating 4 is removed from the joined portion of the coil segment 2 (hatching is provided in the insulating coating removing portion), and the spacer 1 is interposed between the joined portions of the coil segments 2. In the present embodiment, these parts to be joined and the spacer 1 are joined via the joining member 3.

  In this example, a joining member (joining aid) 3 having a melting point lower than that of the spacer 1 is applied to the left and right side surfaces of the spacer 1 in advance by plating or the like before joining.

  In the joining step, as shown in FIG. 9, a resistance welder is used to drive the air cylinder 24 of the welding head 25 and pressurize the joined portion between the coil segments 2a and 2b with the coil segment electrodes 23a and 23b. Furthermore, by energizing between the welded portions of the coil segments 2a and 2b via the welding power source 20, the welding transformer, and the secondary conductor 22, the joining member 3 generates heat due to electric resistance and melts. The electrode material of the electrodes 23a and 23b used at this time is preferably tungsten (W) or molybdenum (Mo). As a result, the adjacent portions 2 ′ outside the slot of the coil segment are spaced apart from each other via the spacer 1, and the insulating interval is sufficiently maintained. The coil segment portion where the insulation interval is maintained is a portion where the insulating coating 4 is applied. The coil segment 2 and the spacer 1 are both made of copper. The joining member 3 is obtained by cladding a copper copper brazing material on both sides of a copper plate with a thickness of 0.05 mm.

  The spacer 1 is thicker than the insulating coating 4.

  In this embodiment, the joining member 3 is preliminarily applied to the spacer 1 by plating or the like, but the spacer 1 and the joining member 3 are separated before joining, and these are inserted together between the joined portions of the coil segments. May be. Even when such a joining member is used, electric resistance welding similar to the above can be performed.

  FIG. 2 shows a second example of joining the coil segment 2 (2a, 2b) and the spacer 1. As shown in FIG. The (a) is the top view which looked at the junction location from the coil segment end surface side, (b) is the front view which shows the junction location vicinity of a coil segment.

  Also in this example, the coil segment 2 is constituted by a rectangular conductor having an insulating coating 4, and the insulating coating 4 is removed from the bonded portion.

  A joining member 3 having a melting point lower than that of the spacer is provided on both surfaces of the spacer 1 in advance, and the spacer 1 with the joining member 3 is inserted between the coil segments 2a and 2b. After that, as shown in FIG. 10, the joined portion of the coil segment and the spacer 1 are welded via the joining member 3 by TIG (Tungsten Inert Gas) welding.

  This TIG welding is performed from one end face side of the coil segment. An inert gas such as argon (Ar) or helium (He) is injected from the gas nozzle 27, and an arc 28 is formed between the welding electrode 26 and the coil segments 2 a and 2 b, the spacer 1, and the joining member 3 in the inert gas atmosphere. Is generated. As a result, the coil segments 2a, 2b, the upper ends of the spacer 1 and the joining member 3 are melted as indicated by reference numeral 5, and after the end of the arc, the melted part 5 is solidified and the joined parts of the coil segments 2a, 2b are It joins via the spacer 1 and the fusion | melting part 5. FIG.

  Also in the present embodiment, adjacent portions 2 ′ outside the coil segment slot are spaced apart from each other through the spacer 1, and the insulating interval is sufficiently maintained.

  Even if only the joining aid 3 is melted by the arc 28, the joining can be performed in the same manner. Further, similar joining can be performed by laser welding, electron beam welding, plasma welding, gas welding, or MIG (Metal Inert Gas) welding as a heat source. The materials of the spacer 1 and the joining member 3 are the same as those in the first embodiment.

  FIG. 3 shows a third example of joining the coil segment 2 (2a, 2b) and the spacer 1. As shown in FIG. The (a) is the top view which looked at the junction location from the coil segment end surface side, (b) is the front view which shows the junction location vicinity of a coil segment.

  Also in this example, the coil segment 2 is constituted by a rectangular conductor having an insulating coating 4, and the insulating coating 4 is removed from the bonded portion.

  The difference between this example and Example 2 (second joining example) is that this example joins the coil segments 2a, 2b and the spacer 1 by direct welding without using the joining member 3. For example, the welding is performed by electron beam welding from the one end face side of the coil segment with the spacer 1 inserted between the joined portions of the coil segments 2a and 2b. By this electron beam welding, a part of the coil segment and the spacer is melted as indicated by reference numeral 5, and the coil segment and the spacer are joined.

  The coil segment and the spacer can be joined through various weldings in the same manner as in the second embodiment instead of the electron beam welding.

  In the present embodiment, the same effects as those of the first and second embodiments can be obtained.

  FIG. 4 shows a fourth joining example of the coil segment 2 (2a, 2b) and the spacer 1. As shown in FIG. The (a) is the top view which looked at the junction location from the coil segment end surface side, (b) is the front view which shows the junction location vicinity of a coil segment.

  In the present embodiment, a conductor having a circular cross section is used as the coil segment 2 (2a, 2b), and the configuration and joining method of the spacer 1 and the joining member 3 are the same as those of the first and second embodiments described above. .

  The sectional shape of the coil segment 2 (2a, 2b) to which the present invention is applied is not limited to the above, and various other sectional shapes such as a polygonal sectional shape as shown in FIG. 5 are adopted. Is possible.

  FIG. 5 shows a fifth joining example of the coil segment 2 (2a, 2b) and the spacer 1. FIG. The (a) is the top view which looked at the junction location from the coil segment end surface side, (b) is the front view which shows the junction location vicinity of a coil segment.

  In this embodiment, a conductor having a polygonal cross section is used as the coil segment 2 (2a, 2b), and the configuration and joining method of the spacer 1 and the joining member 3 are the same as those of the first and second embodiments described above. is there.

  FIG. 6 shows a sixth example of joining the coil segment 2 (2a, 2b) and the spacer 1. As shown in FIG. The (a) is the top view which looked at the junction location from the coil segment end surface side, (b) is the front view which shows the junction location vicinity of a coil segment.

  In this embodiment, a rectangular conductor having a rectangular cross section is used as the coil segment 2 (2a, 2b), and the insulating coating is removed only on the surface to be joined of the coil segment, and the coil segment around the joined portion is removed. The insulating coating 4 is left on the surface. In this example, the joining member 3 is interposed between the surface to be joined of the coil segment 2 and the spacer 1, and the configuration and joining method of the spacer 1 and the joining member 3 are the same as those in the first and second embodiments. .

  FIG. 7 shows a seventh joining example of the coil segment 2 (2a, 2b) and the spacer 1. FIG. The (a) is the top view which looked at the junction location from the coil segment end surface side, (b) is the front view which shows the junction location vicinity of a coil segment.

  The coil segments 2a and 2b to be joined also in this embodiment are made of, for example, a rectangular electric conductor and have an insulating coating 4. The structures of the joined portions (insulating coating removal portions) 2a and 2b, the spacer 1 and the joining member 3 of the coil segment are the same as those in the first and second embodiments.

  The difference from the first and second embodiments is that the surface to be joined (insulating coating removal surface) to the spacer 1 in each of the coil segments 2a and 2b and the facing surface 4 'of the portion having the insulating coating 4 are substantially the same surface. It is the point comprised so that it may continue. Because of this configuration, the insulating coating portion facing in the same direction as the facing surface 4 ′ side of the insulating coating 4, that is, the surface to be joined of the coil segment, is reduced in thickness by a pressing method as shown in FIG. It becomes.

  (A) of FIG. 8 shows the state before pressurization in a state in which a part 2 ′ on the bonded side of the coil segment 2 is set in a mold used for the pressurizer. A part 2 ′ of the coil segment 2, that is, a part to be joined (insulation removal part) and a part having the insulating coating 4 are set on the fixed mold 11. Thereafter, as shown in FIG. 8B, the movable die 10 applies pressure P to a part 2 ′ of the coil segment. The fixed mold 11 and the movable mold 10 have such a shape that pressure is exclusively applied to the surface of the insulating coating 4 in the same direction as the surface to be joined of the coil segment.

  According to the present embodiment, as shown in FIG. 7, when the joined portions of the coil segments 2a and 2b are joined via the spacer 1, the gap (insulation interval) between the coil segment portions 2 ′ other than the joined portions of the coil segments is obtained. ) Can be kept large. Further, by increasing this gap, it is possible to improve the passage of wind generated by the cooling fan in the rotating electrical machine.

  FIG. 14 shows an eighth example of joining of the present invention, and is a partially enlarged perspective view showing a joined state of the stator inner coil segment 2a and the stator outer coil segment 2b. FIG. 15 is a perspective view of the spacer 1 used in the eighth bonding example.

  Bending and twisting of the portion 2 ′ outside the coil segment slot is basically the same as in FIGS. 11 to 13.

  The difference between the present embodiment and the embodiment of FIG. 12 is that, in this embodiment, the spacer 1 is fitted with the respective welded portions of the coil segments 2a and 2b so that the relative positioning between the joined portions is achieved. A pair of positioning holders 6 to be performed is integrally formed.

  For example, the pair of positioning holders 6 have U-shaped concave portions that fit into the joined portions of the coil segments 2a and 2b, respectively, and these U-shaped concave portions are shifted in the axial direction of the coil segments and are opposite to each other. In such a manner, the spacer 1 is integrally provided. Each positioning holder 6 has clamping pieces 6a, 6b and 6c, 6d that sandwich the coil segment.

  The spacer 1 with the holder 6 is formed by machining a 1 mm copper plate, for example, and phosphorous copper brazing material to be a joining member (joining aid) 3 is clad in advance to a thickness of 0.03 mm on both sides of the plate thickness. Is. Each sandwiching piece 6a, 6b, 6c, 6d of the holder 6 is equal to or thinner than the thickness of the other part of the spacer 1 (part for securing a gap between the coil segments).

  According to the present embodiment, in addition to the same effects as the above-described embodiments, the following advantages are provided. That is, the relative position between the spacer 1 and the coil segments 2a and 2b can be stably held without change by the holder 6 before joining the coil segments. Further, since the spacer 1 has a structure that is difficult to come off from the coil segments 2a and 2b, it is easy to perform a joining operation between the spacer and the coil segment.

The 1st example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joined part from the coil segment end face side, and (b) shows the joined part neighborhood of a coil segment. It is a front view. The 2nd example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joined place from the coil segment end face side, and (b) shows the joined place neighborhood of a coil segment. It is a front view. The 3rd example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joint location from the coil segment end face side, and (b) shows the joint location neighborhood of a coil segment. It is a front view. The 4th example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joined part from the coil segment end face side, and (b) shows the joined part neighborhood of a coil segment. It is a front view. The 5th example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joined part from the coil segment end face side, and (b) shows the joined part neighborhood of a coil segment. It is a front view. The 6th example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joined part from the coil segment end face side, and (b) shows the joined part neighborhood of a coil segment. It is a front view. The 7th example of joining of a coil segment and a spacer is shown, The (a) is a top view which looked at a joined part from the coil segment end face side, and (b) shows the joined part neighborhood of a coil segment. It is a front view. Explanatory drawing which shows the process of pressurizing a part of insulation coating of a coil segment. 1 is a diagram showing a resistance welder for joining a coil segment and a spacer of Example 1. FIG. FIG. 6 is a diagram showing an example of TIG welding used in Example 2. The perspective view of the stator used as the application object of this invention. The partial expansion perspective view which shows the junction structure of the coil segment and spacer which are the principal parts of one Example of this invention. The partial expansion perspective view which shows the junction structure of the conventional coil segment and a spacer. The partial expansion perspective view which shows the junction structure of the coil segment and spacer which are the principal parts of the other Example of this invention. The perspective view of the spacer used for the Example of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Spacer, 2 (2a, 2b) ... Coil segment, 3 ... Joining member, 4 ... Insulation coating, 5 ... Molten part (welded metal).

Claims (14)

A stator core having a plurality of slots, and a plurality of coil segments mounted in the respective slots to form a stator winding, and joined portions of the coil segments are joined adjacent to each other outside the slots. In the rotating electrical machine stator
Between the joined parts of the coil segments, there is provided a conductive spacer for spacing between adjacent parts other than the joined parts of the coil segments,
The joined portion of the coil segment and the spacer are joined via welding or a joining member ,
The coil segment is coated with insulation except at least the bonded portion, and the insulating coated portion of the insulating coating in the same direction as the bonded surface side of the coil segment is pressed before bonding to reduce the thickness. and the stator of the rotating electric machine, characterized in that are. In claim 1,
The coil segments to be joined are mounted in different slots, and the coil segment portions outside the slots are formed so that the joined portions of the coil segments are adjacent to each other in a predetermined pattern outside the slot. A stator of a rotating electrical machine in which an interval at an intersecting portion of coil segments other than a joining partner is also secured by cooperation of the spacers. In claim 1 or 2,
The joining member is a stator of a rotating electrical machine made of a metal having a melting point lower than that of the spacer and the coil segment and melted and solidified between the spacer and the coil segment. In claim 3,
The joining member is a stator of a rotating electrical machine that is solder or brazing material added to the surface of the spacer. In claim 3,
The joining member is inserted together with the spacer between the joined parts when joining the coil segments, or is provided in the spacer in advance, and this joining member joins between the coil segment and the spacer. Rotating electric machine stator. In claim 1 or 2,
A stator of a rotating electrical machine in which the spacer is integrally formed with a pair of positioning holders that are fitted with respective joint portions of the coil segments to perform relative positioning between the joint portions. In claim 6,
Each of the pair of positioning holders has U-shaped concave portions that fit into the joined portions of the coil segments, and these U-shaped concave portions are provided on the spacer so as to be opposite to each other with the positions shifted. The stator of the rotating electrical machine. In claim 1 or 2,
The coil segment is an insulating coating except for at least the portion to be joined, and the thickness of the spacer is larger than the thickness of the insulating coating. A stator core having a plurality of slots, and a plurality of coil segments mounted in the respective slots to form a stator winding, and joined portions of the coil segments are joined adjacent to each other outside the slots. In the rotating electrical machine stator
Between the joined parts of the coil segments, there is provided a conductive spacer for spacing between adjacent parts other than the joined parts of the coil segments,
The joined portion of the coil segment and the spacer are joined via welding or a joining member,
The spacer is integrally formed with a pair of positioning holders that are fitted with respective joint portions of the coil segments to perform relative positioning between the joint portions. Child. In claim 9,
Each of the pair of positioning holders has U-shaped concave portions that fit into the joined portions of the coil segments, and these U-shaped concave portions are provided on the spacer so as to be opposite to each other with the positions shifted. stator are rotating electric machine. In claim 9 or 10,
The coil segments to be joined are mounted in different slots, and the coil segment portions outside the slots are formed so that the joined portions of the coil segments are adjacent to each other in a predetermined pattern outside the slot. A stator of a rotating electrical machine in which an interval at an intersecting portion of coil segments other than a joining partner is also secured by cooperation of the spacers. In any one of claims 9 to 11,
The joining member is a stator of a rotating electrical machine made of a metal having a melting point lower than that of the spacer and the coil segment and melted and solidified between the spacer and the coil segment. In any one of claims 9 to 11,
The joining member is a stator of a rotating electrical machine that is solder or brazing material added to the surface of the spacer. 14. A rotating electrical machine comprising a stator, a rotor, and a cooling fan provided at an end of the rotor, wherein the stator is one according to any one of claims 1 to 13. Rotating electric machine.

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