Stator of rotating electrical machine and its coil connection device

Abstract

The object of the present invention is to obtain a stator of a rotating electric machine that can reduce the number of components. A first bus bar (23), a second bus bar (24) and a third bus bar (25) are held in a holding member (22) in a manner spaced apart from each other. The holding member (22) is directly fixed to the coil side end (12a). The holding member (22) is provided with a plurality of slots (22a) as inserted portions. Coil-to-coil connecting portions (12b) are respectively inserted into the plurality of slots (22a). The coil-to-coil connecting portions (12b) inserted into each slot (22a) are fixed by bonding them to the slot (22a) with an adhesive.

Description

Technical Field

[0001] The present disclosure relates to a stator of a rotating electric machine and a coil connecting device thereof. Background Art

[0002] In the existing stator, a plurality of power lines are connected to the stator coil. The plurality of power lines are held by a retaining member. The retaining member is fixed to the motor housing via a fixing member. The fixing member is fixed to the motor housing by a bolt. A fastening hole and a mounting portion are provided in the fixing member. A bolt is inserted into the fastening hole. A retaining member that holds the plurality of power lines is installed in the mounting portion (for example, refer to patent document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-73887 Summary of the invention

[0006] In the above-mentioned conventional stator, since the holder is fixed to the motor case via the fixing member, the number of parts of the device for fixing the power line increases.

[0007] The present disclosure is made to solve the above-mentioned technical problems, and its purpose is to obtain a stator and a coil connection device of a rotating electric machine that can reduce the number of components.

[0008] The stator of the rotating electric machine disclosed in the present invention is characterized in that it includes: a cylindrical stator core; a coil assembly, which has a plurality of coils and is arranged on the stator core; and a coil connecting device, which has a retaining member made of insulating material and a plurality of bus bars, the plurality of bus bars are retained on the retaining member in a manner spaced apart from each other and are each electrically connected by being joined to the coil assembly at one end, and the retaining member is fixed to the coil side end portion which is the end of the coil assembly in the axial direction of the stator core.

[0009] The coil connection device of the stator of the rotating electric machine disclosed in the present invention is characterized by including: a retaining member made of an insulating material, which is arranged at the coil side end of the stator; and a plurality of bus bars, which are retained on the retaining member in a manner spaced apart from each other and are each electrically connected by being joined at one end to any one of the plurality of coils arranged on the stator, and an inserted portion is provided on the retaining member, and the inserted portion is inserted into the insertion portion as a part of the coil side end to fix it.

[0010] According to the stator of the rotating electrical machine and the coil connection device thereof of the present disclosure, the number of components can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the rotating electrical machine according to the first embodiment.

[0012] Figure 2 Yes means Figure 1 A three-dimensional view of the main parts of the stator.

[0013] Figure 3 Yes means Figure 2 A three-dimensional diagram of a coil connection device.

[0014] Figure 4 It is from Figure 3 Observe from different directions Figure 2 A three-dimensional diagram of a coil connection device.

[0015] Figure 5 It is a perspective view showing a coil connection device for a stator of a rotating electrical machine according to a second embodiment.

[0016] Figure 6 It is from Figure 5 Observe from different directions Figure 5 A three-dimensional diagram of a coil connection device.

[0017] Figure 7 It is a perspective view showing a main part of a stator of a rotating electrical machine according to a third embodiment.

[0018] (Explanation of symbols)

[0019] 2 stator;

[0020] 11 stator core;

[0021] 12 coil assembly;

[0022] 12a Coil side end;

[0023] 12b: inter-coil connection portion (insertion portion);

[0024] 13 coils;

[0025] 21 Coil connection device;

[0026] 22 retaining member;

[0027] 22a groove (inserted portion);

[0028] 22d recessed portion (inserted portion);

[0029] 23 First Bus;

[0030] 24 Second bus bar;

[0031] 25 Third Bus;

[0032] 26 a first power supply conductor;

[0033] 27 a second power supply conductor;

[0034] 28 a third power supply conductor;

[0035] 32 first conductive line (power supply conductor);

[0036] 33 second conductive line (power supply conductor);

[0037] 34 Third conductive line (power supply conductor). DETAILED DESCRIPTION

[0038] Hereinafter, embodiments will be described with reference to the drawings.

[0039] Implementation Method 1

[0040] Figure 1 This is a cross-sectional view of the rotating electrical machine according to Embodiment 1, and shows a cross section along the axis of the rotating shaft. The rotating electrical machine according to Embodiment 1 is a three-phase motor used as a power source of an electric vehicle.

[0041] The rotating electrical machine includes a housing 1, a cylindrical stator 2, and a rotor 3. The rotor 3 rotates around an axis C as a center.

[0042] The frame 1 has a cylindrical frame 4, a disc-shaped first bracket 5, and a disc-shaped second bracket 6. The first bracket 5 is fixed to the first axial end of the frame 4. The second bracket 6 is fixed to the second axial end of the frame 4. The axial direction of the frame 4 is parallel to the axis C, which is Figure 1 Up and down direction.

[0043] The first bracket 5 is provided with a first bearing 7. The second bracket 6 is provided with a second bearing 8. The rotor 3 is rotatably supported by the frame 1 via the first bearing 7 and the second bearing 8.

[0044] The stator 2 is fixed to the inner surface of the frame 4. The stator 2 faces the outer peripheral surface of the rotor 3 via a gap. The stator 2 has a cylindrical stator core 11 and a coil assembly 12.

[0045] The coil assembly 12 is provided on the stator core 11. In addition, the coil assembly 12 has a plurality of coils 13. The plurality of coils 13 are molded by a molding resin.

[0046] The stator core 11 may be a one-piece core or a split core. In the one-piece core, a plurality of annular electromagnetic steel sheets are stacked along the axial direction of the stator core 11. The axial direction of the stator core 11 is a direction parallel to the axis C.

[0047] The split core is formed by combining a plurality of core blocks in a cylindrical shape. In each core block, a plurality of arc-shaped electromagnetic steel sheets are stacked along the axial direction of the stator core 11 .

[0048] The first holder 5 is provided with a terminal block 9. A connection conductor portion 10 is provided between the terminal block 9 and the coil assembly 12. The connection conductor portion 10 includes a plurality of power supply conductors. For example, a copper cable or a copper plate is used as each power supply conductor.

[0049] Electric power is supplied to the coil assembly 12 via the connection conductor portion 10. The electric power is supplied to the coil assembly 12, so that a magnetic force is generated in the stator 2.

[0050] By changing the phase of the power supplied to the coil assembly 12 with time, the magnetic force generated in the coil assembly 12 changes along the circumferential direction of the stator 2, thereby rotating the rotor 3. The circumferential direction of the stator 2 is a direction along a circle with the axis C as the center.

[0051] Figure 2 Yes means Figure 1 3D view of the main part of the stator 2. The stator core 11 includes an annular yoke 11a and a plurality of pole teeth 11b. The plurality of pole teeth 11b protrude radially inward from the yoke 11a. The radial direction of the stator core 11 is a direction orthogonal to the axis C when the stator core 11 is installed in the rotating electric machine.

[0052] The tip of each pole tooth 11b faces the outer periphery of the rotor 3 with a gap therebetween. Each coil 13 is formed by winding a copper wire around the corresponding pole tooth 11b. The outer periphery of each copper wire is covered with an insulating film. Figure 2 Detailed illustration of each coil 13 is omitted.

[0053] An insulating material (not shown) is interposed between each coil 13 and the stator core 11. The insulating material is made of, for example, paper or resin.

[0054] The winding method of the plurality of coils 13 is a distributed winding method. In the distributed winding method, each coil 13 is wound across a plurality of pole teeth 11 b.

[0055] Three-phase AC power is supplied to the coil assembly 12 of Embodiment 1. The coil assembly 12 is composed of three-phase circuits having different phases, namely, a U-phase circuit, a V-phase circuit, and a W-phase circuit. The three-phase circuits are connected to each other in a star connection.

[0056] Each phase circuit is composed of two series of circuits connected in parallel to each other. Each series of circuits is composed of a plurality of coils 13 connected electrically in series.

[0057] A plurality of inter-coil connection portions 12b are provided at the ends of the coil assembly 12 in the axial direction of the stator core 11, namely, at the coil side ends 12a. Each inter-coil connection portion 12b is a portion where corresponding two coils 13 among the plurality of coils 13 are connected to each other.

[0058] Each inter-coil connection portion 12b protrudes from the mold resin in the axial direction of the stator core 11. In addition, in each inter-coil connection portion 12b, the insulating coating is removed from the outer circumference of each copper wire, and the copper wires are welded to each other.

[0059] The coil side end portion 12a is provided with a coil connection device 21. The coil connection device 21 includes a holding member 22 made of an insulating material and a plurality of bus bars. In the first embodiment, the first bus bar 23, the second bus bar 24, and the third bus bar 25 can be used as the plurality of bus bars.

[0060] The first bus bar 23, the second bus bar 24, and the third bus bar 25 are held by the holding member 22 at intervals from each other. The first bus bar 23, the second bus bar 24, and the third bus bar 25 are electrically connected by being joined to the coil assembly 12, respectively.

[0061] Furthermore, the first bus bar 23 , the second bus bar 24 , and the third bus bar 25 are each formed by bending a copper flat plate.

[0062] The first bus bar 23 electrically connects the first series circuit U1 of the U phase with the second series circuit U2 of the U phase. In addition, the first bus bar 23 is joined at one end thereof to the end of the coil 13 of the circuit U1 by welding. In addition, the first bus bar 23 is joined at a portion thereof to the end of the coil 13 of the circuit U2 by welding.

[0063] The second bus bar 24 electrically connects the first series circuit V1 of the V phase with the second series circuit V2 of the V phase. In addition, the second bus bar 24 is joined at one end thereof to the end of the coil 13 of the circuit V1 by welding. In addition, the second bus bar 24 is joined at the other end thereof to the end of the coil 13 of the circuit V2 by welding.

[0064] The third bus bar 25 electrically connects the first series of the W-phase circuit W1 and the second series of the W-phase circuit W2. In addition, the third bus bar 25 is joined at one end thereof to the end of the coil 13 of the circuit W1 by welding. In addition, the third bus bar 25 is joined at the other end thereof to the end of the coil 13 of the circuit W2 by welding.

[0065] The holding member 22 is directly fixed to the coil side end portion 12a. A plurality of grooves 22a as inserted portions are provided in the holding member 22. In the first embodiment, the holding member 22 is provided with three grooves 22a.

[0066] The inter-coil connection parts 12b are respectively inserted into the plurality of slots 22a. That is, three inter-coil connection parts 12b among the plurality of inter-coil connection parts 12b are insertion parts in the first embodiment.

[0067] The first bus bar 23 , the second bus bar 24 , and the third bus bar 25 are insulated from the three inter-coil connecting portions 12 b as insertion portions by the holding member 22 .

[0068] In addition, the coil connection portion 12b inserted into each slot 22a is bonded to the slot 22a by an adhesive (not shown) to be fixed. Thus, the holding member 22 is bonded to the coil side end portion 12a in both the radial direction and the circumferential direction of the stator core 11. As the adhesive, for example, an epoxy resin adhesive can be used.

[0069] Figure 3 Yes means Figure 2 A three-dimensional view of the coil connection device 21. Figure 4 It is from Figure 3 Observe from different directions Figure 2 A three-dimensional view of the coil connection device 21.

[0070] In Embodiment 1, resin can be used as a material of holding member 22. Holding member 22 is integrally molded with first bus bar 23, second bus bar 24, and third bus bar 25 so as to partially cover each of the first bus bar 23, second bus bar 24, and third bus bar 25.

[0071] Furthermore, the first bus bar 23, the second bus bar 24, and the third bus bar 25 are integrated with the holding member 22 by insert molding. However, the first bus bar 23, the second bus bar 24, and the third bus bar 25 may be press-fitted or bonded to the holding member 22 after the holding member 22 is insert-molded.

[0072] A plurality of positioning holes 22b and a plurality of clamping portions 22c are provided in the holding member 22. The plurality of positioning holes 22b and the plurality of clamping portions 22c are used to position a positioning jig and a welding device used in welding work.

[0073] In such stator 2 and coil connection device 21, first bus bar 23, second bus bar 24, and third bus bar 25 are held by holding member 22. In addition, holding member 22 is fixed to coil side end portion 12a.

[0074] Therefore, it is possible to omit a component for fixing the holding member 22 to the frame body 1, and the number of components can be reduced. In addition, the coil connection device 21 can be miniaturized.

[0075] Furthermore, it is possible to suppress the load from being applied to the welded portions of the first bus bar 23, the second bus bar 24, and the third bus bar 25 when the rotating electrical machine vibrates. Thus, it is possible to suppress connection failure due to deterioration of the welded portions.

[0076] Furthermore, the holding member 22 can electrically insulate the first bus bar 23 , the second bus bar 24 , and the third bus bar 25 , which have different potentials from each other.

[0077] Furthermore, the first bus bar 23 , the second bus bar 24 , and the third bus bar 25 can be electrically insulated from surrounding conductive members by the holding member 22 .

[0078] Furthermore, when welding the coil assembly 12 and the coil connection device 21, it is not necessary to adjust the positions of the first bus bar 23, the second bus bar 24, and the third bus bar 25. This improves the workability of connecting the coil assembly 12 and the coil connection device 21.

[0079] In addition, a plurality of grooves 22a are provided in the retaining member 22, and the coil connection portion 12b is inserted into each groove 22a. Therefore, the coil connection device 21 can be easily positioned relative to the coil side end 12a. In addition, the retaining member 22 can be firmly bonded to the coil side end 12a in both the radial direction and the circumferential direction of the stator core 11.

[0080] In addition, the coil-to-coil connection portions 12b are used as the insertion portions, so the holding member 22 can be easily fixed to the coil side end portion 12a without adding a new insertion portion. In addition, the first bus bar 23, the second bus bar 24, and the third bus bar 25 can be electrically insulated from the three coil-to-coil connection portions 12b as the insertion portions by the holding member 22.

[0081] In addition, the holding member 22 is integrally formed with the first bus bar 23, the second bus bar 24, and the third bus bar 25. Therefore, the coil connection device 21 can be easily compacted and unitized. In addition, the relative positions of the first bus bar 23, the second bus bar 24, and the third bus bar 25 can be firmly held.

[0082] Furthermore, the holding member 22 is provided with a plurality of positioning holes 22b and a plurality of clamping portions 22c. Therefore, the workability of welding the coil side end portion 12a and the coil connecting device 21 can be improved. Thus, the welding work can be automated.

[0083] Implementation Method 2

[0084] then, Figure 5This is a perspective view showing a coil connection device 21 of a stator 2 of a rotating electrical machine according to Embodiment 2. The first bus bar 23 has a flat first protrusion 23a. The second bus bar 24 has a flat second protrusion 24a. The third bus bar 25 has a flat third protrusion 25a.

[0085] The first protrusion 23a, the second protrusion 24a and the third protrusion 25a respectively protrude from the holding member 22 in the axial direction of the stator core 11 in the opposite direction of the stator core 11. The first protrusion 23a, the second protrusion 24a and the third protrusion 25a are arranged to be spaced apart from each other in the circumferential direction of the stator core 11.

[0086] The first protrusion 23a is connected to a first power supply conductor 26. The second protrusion 24a is connected to a second power supply conductor 27. The third protrusion 25a is connected to a third power supply conductor 28.

[0087] The first power supply conductor 26, the second power supply conductor 27, and the third power supply conductor 28 are arranged on the side opposite to the coil side end 12a with respect to the holding member 22 in the axial direction of the stator core 11. In addition, the first power supply conductor 26, the second power supply conductor 27, and the third power supply conductor 28 are each formed by bending a copper flat plate. The first power supply conductor 26, the second power supply conductor 27, and the third power supply conductor 28 are each L-shaped.

[0088] A first terminal plate 29 is fixed to an end of the first power supply conductor 26, that is, an end on the side opposite to the first bus bar 23. A second terminal plate 30 is fixed to an end of the second power supply conductor 27, that is, an end on the side opposite to the second bus bar 24. A third terminal plate 31 is fixed to an end of the third power supply conductor 28, that is, an end on the side opposite to the third bus bar 25.

[0089] The first terminal plate 29, the second terminal plate 30 and the third terminal plate 31 are fixed to Figure 1 The terminal block 9 shown. An external circuit (not shown) is electrically connected to the first terminal block 29, the second terminal block 30, and the third terminal block 31. The external circuit is, for example, an inverter. Thus, a three-phase AC voltage is applied to the coil assembly 12.

[0090] The connection conductor portion 10 of the second embodiment includes a first power supply conductor 26 , a second power supply conductor 27 , a third power supply conductor 28 , a first terminal plate 29 , a second terminal plate 30 , and a third terminal plate 31 .

[0091] Figure 6 It is from Figure 5 Observe from different directions Figure 5A three-dimensional diagram of the coil connection device 21. Figure 6 The connection conductor portion 10 is omitted. The holding member 22 of the second embodiment is provided with a plurality of recessed portions 22d as inserted portions, instead of the plurality of grooves 22a of the first embodiment. In the second embodiment, the holding member 22 is provided with three recessed portions 22d.

[0092] The cross section of each recess 22d, that is, the cross section perpendicular to the axial direction of the stator core 11, is circular. In addition, each recess 22d does not penetrate the holding member 22. In other words, each recess 22d has a bottom surface.

[0093] The inter-coil connection parts 12b are respectively inserted into the plurality of recessed parts 22d. That is, three inter-coil connection parts 12b among the plurality of inter-coil connection parts 12b are insertion parts in the second embodiment.

[0094] The coil connection portions 12b inserted into the recesses 22d are bonded and fixed in the recesses 22d by an adhesive (not shown). That is, in the second embodiment, the holding member 22 is bonded to the coil side end portions 12a in the axial, radial and circumferential directions of the stator core 11.

[0095] Apart from Figure 5 and Figure 6 The structure of the rotating electrical machine is the same as that of the first embodiment except for the structures of the coil connecting device 21 and the connecting conductor portion 10 shown.

[0096] The above-mentioned structure can also achieve the same effects as those of the first embodiment.

[0097] In addition, three recesses 22d are provided in the retaining member 22, and the coil connection portion 12b is inserted into each recess 22d. Therefore, the coil connection device 21 can be more firmly fixed to the coil side end 12a. As a result, the load applied to the welding portion of the first bus bar 23, the second bus bar 24 and the third bus bar 25 when the rotating electric machine vibrates can be more reliably suppressed.

[0098] In addition, the insulation between the second bus bar 24 and the third bus bar 25, which are different in phase from the first power supply conductor 26, and the first power supply conductor 26 can be sufficiently ensured. Similarly, the insulation between the first bus bar 23 and the third bus bar 25 and the second power supply conductor 27, and the insulation between the first bus bar 23 and the second bus bar 24 and the third power supply conductor 28 can be sufficiently ensured, respectively.

[0099] Furthermore, by filling the recessed portions 22d with adhesive in advance, the work of fixing the inter-coil connecting portion 12b to the recessed portions 22d can be easily performed.

[0100] In addition, each bus bar 23, 24 or 25 and the corresponding power supply conductor 26, 27 or 28 may be formed as a single component. In other words, each bus bar 23, 24 or 25 and the corresponding power supply conductor 26, 27 or 28 may be formed by bending a single flat plate.

[0101] According to the above configuration, even when positional deviation occurs between the terminal block 9 and the coil side end portion 12 a , degradation of the connection portion between each bus bar 23 , 24 or 25 and the corresponding power supply conductor 26 , 27 or 28 can be suppressed.

[0102] Furthermore, each power supply conductor 26, 27 or 28 and the corresponding terminal block 29, 30 or 31 may be configured as a single component.

[0103] In addition, the cross-sectional shape of each recessed portion 22d is not limited to a circle, and may be, for example, a rectangle.

[0104] In addition, the cross-sectional area of ​​each recessed portion 22d may not be constant in the depth direction. For example, each recessed portion 22d may be in a cone shape or a pyramid shape.

[0105] Furthermore, the first power supply conductor 26 , the second power supply conductor 27 , and the third power supply conductor 28 may be arranged radially outside the stator core 11 with respect to the holding member 22 .

[0106] Implementation 3

[0107] then, Figure 7 1 is a perspective view showing the main part of the stator 2 of the rotating electric machine according to Embodiment 3. A first conductive wire 32 as a power supply conductor is connected to the first protrusion 23a. A second conductive wire 33 as a power supply conductor is connected to the second protrusion 24a. A third conductive wire 34 as a power supply conductor is connected to the third protrusion 25a.

[0108] The first conductive wire 32, the second conductive wire 33, and the third conductive wire 34 are arranged on the side opposite to the coil side end 12a with respect to the holding member 22 in the axial direction of the stator core 11. In addition, the first conductive wire 32, the second conductive wire 33, and the third conductive wire 34 are each flexible. In addition, as the first conductive wire 32, the second conductive wire 33, and the third conductive wire 34, for example, a copper twisted wire is used.

[0109] A first terminal plate 29 is fixed to an end of the first conductive wire 32, that is, an end on the side opposite to the first bus bar 23. A second terminal plate 30 is fixed to an end of the second conductive wire 33, that is, an end on the side opposite to the second bus bar 24. A third terminal plate 31 is fixed to an end of the third conductive wire 34, that is, an end on the side opposite to the third bus bar 25.

[0110] The structure of the rotating electrical machine is the same as that of the second embodiment except for the first conductive wire 32 , the second conductive wire 33 , and the third conductive wire 34 .

[0111] The above-mentioned structure can also achieve the same effects as those of the first embodiment.

[0112] Furthermore, the first conductive wire 32, the second conductive wire 33, and the third conductive wire 34 are each flexible. Therefore, even if a positional misalignment occurs between the terminal block 9 and the coil side end 12a, degradation of the connection between each bus bar 23, 24, or 25 and the corresponding conductive wire 32, 33, or 34 can be suppressed.

[0113] In Embodiments 1 to 3, the winding method of the plurality of coils 13 may be concentrated winding. In the concentrated winding method, each coil 13 is wound around only one pole tooth 11 b.

[0114] In the first to third embodiments, the first bus bar 23, the second bus bar 24, and the third bus bar 25 are not limited to the components formed by bending a flat plate. Each bus bar may be, for example, a component formed by bending a copper wire with an insulating coating. In addition, the outer periphery of the conductor may be covered with an insulating coating or may not be covered.

[0115] In addition, in Embodiments 1 to 3, the number of bus bars is not limited to three.

[0116] In addition, in Embodiments 1 to 3, the insertion portion is not limited to the inter-coil connecting portion 12 b.

[0117] In Embodiments 1 to 3, the holding member 22 may be fixed to the arcuate portion of the coil side end 12 a . In this case, the holding member 22 may be provided with an inserted portion into which the arcuate portion as the insertion portion is inserted.

[0118] Furthermore, in Embodiments 1 to 3, the inserted portion may be a through hole penetrating the holding member 22 .

[0119] Furthermore, in Embodiments 1 to 3, a plurality of inserted portions having different shapes may be provided on one holding member 22 .

[0120] In the first to third embodiments, as long as the insulation distance can be ensured, the material of the holding member 22 may be a material other than resin.

[0121] In addition, in Embodiments 1 to 3, the coil connection device 21 is provided at the coil side end 12a on one side of the terminal block 9, but the coil connection device 21 may be provided at the coil side end 12a on the side opposite to the terminal block 9. In addition, the coil connection device 21 is provided at the coil side end 12a on both sides of the terminal block 9 and the side opposite to the terminal block 9.

[0122] In addition, in Embodiments 1 to 3, the number of coil connection devices 21 provided at one coil side end portion 12 a is not particularly limited.

[0123] Furthermore, the use of rotating electrical machines is not limited to electric vehicles.

[0124] In addition, the rotating electrical machine is not limited to a motor, and may be, for example, a generator.

Claims

1. A stator of a rotating electrical machine, characterized in that: include: A cylindrical stator core; a coil assembly having a plurality of coils and disposed on the stator core; as well as A coil connection device, the coil connection device having a holding member made of an insulating material and a plurality of bus bars, the plurality of bus bars being held by the holding member in a manner spaced apart from each other and each being electrically connected by being joined to the coil assembly at one end, The holding member is fixed to a coil side end portion which is an end portion of the coil assembly in the axial direction of the stator core. The holding member is provided with an inserted portion, and the inserting portion, which is a part of the coil side end portion, is inserted into the inserted portion to be fixed. The insertion portion is a portion where two coils among the plurality of coils are connected to each other. The inserted portion is a groove or a recess into which the inserting portion is inserted. The holding member is integrally formed with the plurality of bus bars so as to partially cover each of the bus bars.

2. The stator of a rotating electrical machine according to claim 1, wherein: Also included are a plurality of power supply conductors respectively connected to the plurality of bus bars, The plurality of power supply conductors are arranged on the opposite side of the coil side end portion with respect to the holding member in the axial direction of the stator core.

3. The stator of a rotating electrical machine according to claim 2, wherein: Each of the bus bars and the corresponding power supply conductor is formed as a single component.

4. The stator of a rotating electrical machine according to claim 2, wherein: Each of the power supply conductors is a flexible conductive wire.

5. A coil connection device for a stator of a rotating electrical machine, characterized in that: include: A retaining member made of insulating material, wherein the retaining member is fixed to the coil side end of the stator; as well as a plurality of bus bars, the plurality of bus bars being held by the holding member in a manner spaced apart from each other and each of the bus bars being electrically connected by being joined at one end to any one of the plurality of coils provided on the stator, The holding member is provided with an inserted portion into which the insertion portion, which is a part of the coil side end portion, is inserted and fixed. The insertion portion is a coil-to-coil connection portion that is a portion that connects two coils among a plurality of coils provided in the stator to each other. The inserted portion is a groove or a recess into which the inserting portion is inserted. The holding member is integrally formed with the plurality of bus bars so as to partially cover each of the bus bars.

Images