Stator of a rotating electric machine

Abstract

To provide a stator capable of improving vibration resistance.SOLUTION: A stator is applied to a rotary electric machine including a terminal block and includes a stator coil. The stator includes a lead wire (22) drawn from the stator coil, a bus bar (24), a first terminal (60) for electrically connecting the lead wire and the bus bar, and a second terminal (70) electrically connected to the bus bar and fixed to the terminal block. The first terminal includes a first thermal joint section (61) jointed to the lead wire by heat cramping or welding and a first mechanical joint section (63) mechanically jointed to the lead wire on the stator coil side of the first thermal joint section.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a stator for a rotating electrical machine. [Background Art]

[0002] Conventionally, there is a stator in which a joining terminal crimped to one end of a power line (busbar) is welded to a lead wire drawn out from a stator coil of a rotating electrical machine (see Patent Document 1). [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2019-103354 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] By the way, in the stator described in Patent Document 1, when vibration occurs, a vibration load is applied to the welded portion between the lead wire and the joining terminal. In a portion joined by applying heat such as welding or thermal crimping, recrystallization of the metal structure occurs due to heat, which reduces strength. For this reason, the rotating electrical machine described in Patent Document 1 may have reduced vibration resistance.

[0005] The present invention has been made to solve the above problems, and a main object thereof is to provide a stator capable of improving vibration resistance. [Means for Solving the Problem]

[0006] A first means for solving the above problem is: A stator (16) applied to a rotating electrical machine (10) including a terminal block (20) and including a stator coil (38), a lead wire (22) drawn out from the stator coil, a busbar (24), A first terminal (60) electrically connects the lead wire and the busbar, A second terminal (70) is electrically connected to the busbar and fixed to the terminal block, Equipped with, The first terminal comprises a first thermal joint (61) joined to the lead wire by heat crimping or welding, and a first mechanical joint (63) mechanically coupled to the lead wire on the stator coil side of the first thermal joint.

[0007] According to the above configuration, the stator is applied to a rotating electric machine equipped with a terminal block and includes a stator coil. The lead wires drawn from the stator coil and the busbar are electrically connected by a first terminal. The second terminal is electrically connected to the busbar and fixed to the terminal block. Therefore, the terminal block and the stator coil can be electrically connected via the second terminal, the busbar, the first terminal, and the lead wires.

[0008] Here, the first terminal is provided with a first thermal joint that is joined to the lead wire by heat crimping or welding. Therefore, although the lead wire and the first thermal joint are firmly joined, there is a risk that the strength may decrease due to recrystallization caused by the heat during joining. In this regard, the first terminal is provided with a first mechanical joint that is mechanically coupled to the lead wire on the stator coil side of the first thermal joint. Therefore, when vibration occurs in the stator, the vibration load can be borne by the first mechanical joint. Furthermore, since the first mechanical joint is mechanically coupled to the lead wire, it does not suffer a decrease in strength due to heat during joining. Thus, the vibration resistance of the stator can be improved.

[0009] Generally, lead wires have a structure in which the conductor is covered with an insulating coating. When a terminal is joined to a lead wire by heat crimping or welding, the insulating coating of the lead wire is peeled off, exposing the conductor. When the insulating coating is peeled off from the lead wire, a portion of the conductor is also scraped away. Therefore, in a lead wire, the strength of the part where the insulating coating has been peeled off is lower than the strength of the part that is covered with the insulating coating.

[0010] In the second method, the lead wire comprises a covered portion in which the conductor is covered with an insulating film and an exposed portion in which the conductor is exposed, the first thermal joint is joined to the exposed portion and the first mechanical joint is joined to the covered portion. Therefore, the first mechanical joint can be joined to the covered portion, which has higher strength than the exposed portion, and the vibration resistance of the stator can be further improved.

[0011] In the third method, the second terminal comprises a second thermal joint joined to the busbar by heat riveting or welding, and a second mechanical joint mechanically coupled to the busbar on the first terminal side of the second thermal joint. Therefore, when vibration occurs in the stator, the second mechanical joint can bear the vibration load. Furthermore, since the second mechanical joint is mechanically coupled to the busbar, it does not suffer a decrease in strength due to heat during coupling. Thus, the vibration resistance of the stator can be improved. In other words, the connection between the busbar and the second terminal can also be made to have the same effects as the first method.

[0012] In the fourth means, the first terminal is formed in a plate shape and has a first surface and a second surface opposite to the first surface, the first thermal joint being joined to the lead wire on the first surface, the first mechanical joint being joined to the lead wire on the first surface, and the busbar being fixed to the second surface. With this configuration, the lead wire is arranged on the first surface of the first terminal and the busbar is arranged on the second surface opposite to the first surface. Therefore, interference between the lead wire and the busbar can be suppressed compared to the case where the lead wire and the busbar are arranged on the same side of the plate-shaped first terminal. Consequently, there is no need to make the first terminal unnecessarily large, and the first terminal can be made smaller and lighter.

[0013] In the stator described in Patent Document 1, the lead wire from the stator coil extends in a direction away from the second terminal (terminal block), and the bus bar extends in a direction approaching the second terminal from the connection portion with the joining terminal (first terminal). That is, after extending in a direction away from the second terminal, the lead wire and the bus bar are folded back in a direction approaching the second terminal. For this reason, the weight of the lead wire and the bus bar increases, which may lower vibration resistance.

[0014] In this regard, according to the fifth means, the lead wire extends from the stator coil in a direction approaching the second terminal, and the bus bar extends from the connection portion with the first terminal in a direction approaching the second terminal. For this reason, both the lead wire and the bus bar extend in a direction approaching the second terminal (terminal block), and are not folded back in a direction approaching the second terminal after extending in a direction away from the second terminal. Therefore, an increase in the weight of the lead wire and the bus bar can be suppressed, and a decrease in vibration resistance can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] [Figure 1] A cross-sectional view of a rotating electrical machine. [Figure 2] A connection diagram of a stator coil. [Figure 3] A perspective view of a stator. [Figure 4] A side view of a stator. [Figure 5] A perspective view of a lead wire, a connection terminal, a bus bar, and a fastening terminal. [Figure 6] A perspective view of a lead wire, a connection terminal, a bus bar, and a fastening terminal. [Figure 7] An enlarged perspective view of a lead wire, a connection terminal, and a bus bar. [Figure 8] A cross-sectional view of a modified example of a rotating electrical machine. MODE FOR CARRYING OUT THE INVENTION

[0016] Hereinafter, an embodiment embodied in a stator of a rotating electrical machine mounted on an electric vehicle or the like will be described with reference to the drawings.

[0017] As shown in Figure 1, the rotating electrical machine 10 functions as an electric motor that receives power supply to generate rotational power, and also functions as a generator that generates electricity by receiving rotational power. Note that the rotating electrical machine 10 may function as only one of an electric motor and a generator.

[0018] The rotating electrical machine 10 includes a rotor 12, a stator 16, a rotating shaft 14, and a housing 18. The rotor 12 includes a rotor core 30 and a permanent magnet 32 embedded in the rotor core 30. The rotor core 30 is a cylindrical member formed by laminating electromagnetic steel sheets (e.g., silicon steel sheets). The rotating shaft 14 is inserted through the center of the rotor core 30 and fixed thereto. The rotating shaft 14 is attached to the housing 18 via a bearing 34. The rotating shaft 14 and the rotor core 30 fixed to the rotating shaft 14 are rotatable relative to the housing 18.

[0019] The stator 16 includes a stator core 36 and a stator coil 38. The stator core 36 is a substantially cylindrical member arranged concentrically with the rotor 12, and includes an annular yoke and a plurality of teeth protruding radially from the inner circumferential surface of the yoke. The plurality of teeth are arranged at predetermined intervals in the circumferential direction, and a slot which is a space for inserting the stator coil 38 is formed between two adjacent teeth. Such a stator core 36 is composed of a plurality of electromagnetic steel sheets (e.g., silicon steel sheets) laminated in the axial direction. The plurality of electromagnetic steel sheets are positioned relative to each other and joined together to form the stator core 36.

[0020] The stator coil 38 is formed by winding a winding around the teeth in a concentrated winding manner. Figure 2 is a connection diagram of the stator coil 38. The stator coil 38 includes three-phase phase coils, namely a U-phase coil 40U, a V-phase coil 40V, and a W-phase coil 40W. In the following description, when the U-phase, V-phase, and W-phase are not distinguished, the alphabets U, V, W are omitted and referred to as "phase coil 40".

[0021] Each phase coil 40 is constructed by connecting two phase coil sections in parallel. For example, the U-phase coil 40U is made by connecting the U-phase first coil section 42_1U and the U-phase second coil section 42_2U in parallel. Similarly, the V-phase coil 40V is made by connecting the V-phase first coil section 42_1V and the V-phase second coil section 42_2V in parallel, and the W-phase coil 40W is made by connecting the W-phase first coil section 42_1W and the W-phase second coil section 42_2W in parallel. In the following explanation, when the U-phase, V-phase, and W-phase are not distinguished, the letters U, V, and W are omitted and the section is referred to as "phase coil section 42".

[0022] The ends of two phase coil sections 42 of the same phase (for example, the ends of two phase coil sections 42_1U and 42_2U belonging to the U phase) are joined to each other. Also, the starting ends of two phase coil sections 42 of the same phase (for example, the starting ends of two phase coil sections 42_1U and 42_2U belonging to the U phase) are joined to each other. As will be described later, the starting end of each phase coil section 42 functions as a lead wire 22 drawn out from the stator coil 38.

[0023] Furthermore, the two lead wires 22 belonging to the same phase are connected in parallel by joining them to the connection terminals 60, which will be described later. The ends of the three phase coils 40 are joined to each other, forming a neutral point 43. The starting ends of the three phase coils 40 are electrically connected to the terminals 44 of the terminal block 20 via the busbars 24, which will be described later.

[0024] The wiring configuration described here is merely an example and may be modified as appropriate. For example, in this example, multiple phase coil sections 42 are connected in parallel, but they may be connected in series. Also, the number of phase coil sections 42 constituting one phase coil 40 may be three or more. Furthermore, the winding is not limited to concentrated winding, but may be wound in other configurations, such as distributed winding.

[0025] As shown in Figures 1, 3, and 4, a portion of the stator coil 38 protrudes from the axial end face of the stator core 36, forming a coil end portion. From this coil end portion, the lead wires 22, which are the starting ends of the phase coil portions 42, are drawn out axially outward from the stator 16 (rotation axis 14). As shown in Figure 2, there are six phase coil portions 42, so there are also six lead wires 22. Each lead wire 22 is connected to the busbar 24 via a connection terminal 60, which will be described later.

[0026] The busbar 24 is a conductor that connects the lead wire 22 and the terminal block 20, and can carry a large current. The busbar 24 is formed in the shape of a rod or plate from copper or the like. Connection terminals 60 and fastening terminals 70 are attached to both ends of the busbar 24, which will be described later.

[0027] The rotating electric machine 10 further includes a terminal block 20. The terminal block 20 is provided penetrating both inside and outside the housing 18. The portion of the terminal block 20 that protrudes into the inside of the housing 18 is provided with terminals 44 that are fastened to fastening terminals 70. The portion of the terminal block 20 that protrudes outside the housing 18 is provided with external terminals (not shown) that are electrically connected to terminals 44. Conductors drawn from an inverter or the like are connected to these external terminals.

[0028] Next, the connection structure of the lead wire 22, connection terminal 60, bus bar 24, and fastening terminal 70 will be explained with reference to Figures 5 to 7.

[0029] As described, the lead wire 22 is the starting end of the phase coil section 42, and there are two lead wires 22 belonging to the same phase. The winding that constitutes the phase coil section 42 has a coil conductor 50 and an insulating film 52 that covers the coil conductor 50. In the illustrated example, the coil conductor 50 (conductor) is a flat wire with a roughly rectangular cross-section, but the form of the coil conductor 50 is not limited to this, and it may also be a round wire with a circular cross-section.

[0030] The lead wire 22 is drawn out from the coil end portion in the axial direction outward from the stator core 36. At the end of the lead wire 22, the insulating coating 52 is peeled off, and the coil conductor 50 is exposed to the outside. That is, the lead wire 22 has a covered portion 56 in which the coil conductor 50 is covered with the insulating coating 52, and a peeled portion 54 (exposed portion) in which the coil conductor 50 is exposed to the outside without being covered with the insulating coating 52. When the insulating coating 52 is peeled off, the coil conductor 50 is slightly scraped, and the coil conductor 50 in the peeled portion 54 is slightly thinner than the coil conductor 50 in the covered portion 56. For this reason, the strength of the peeled portion 54 is lower than the strength of the covered portion 56.

[0031] The connection terminal 60 (first terminal) is formed in a plate shape from a copper alloy or the like. The connection terminal 60 has a first surface 60a as its main surface with the largest area, and a second surface 60b opposite to the first surface 60a. Two lead wires 22 belonging to the same phase are connected to the connection terminal 60. As a result, the two lead wires 22, and consequently the phase coil section 42, are connected in parallel.

[0032] The connection terminal 60 is equipped with a first thermal joint 61 that is welded to the leader wire 22. The first thermal joint 61 is bent toward the first surface 60a side and sandwiches the peeled portion 54 of the leader wire 22. In other words, the first thermal joint 61 is pressed against the peeled portion 54 of the leader wire 22. On the first surface 60a, the first thermal joint 61 is welded to the peeled portion 54 of the leader wire 22.

[0033] The connection terminal 60 includes a first mechanical coupling portion 63 that is crimped (mechanically coupled) to the lead wire 22 on the stator coil 38 side of the first thermal coupling portion 61. The first mechanical coupling portion 63 is provided parallel to the first thermal coupling portion 61. The first mechanical coupling portion 63 is bent toward the first surface 60a side and sandwiches the insulated portion 56 of the lead wire 22. That is, on the first surface 60a, the first mechanical coupling portion 63 is crimped (fixed) to the insulated portion 56 of the lead wire 22. The first mechanical coupling portion 63 is not heated when it is crimped to the insulated portion 56 of the lead wire 22.

[0034] The busbar 24 is a conductor with a roughly circular cross-section. This busbar 24 is not covered with an insulating coating. A connection terminal 60 is connected (electrically connected) to one end of the busbar 24, and a fastening terminal 70 is connected to the other end.

[0035] The connection terminal 60 includes a third mechanical coupling portion 65 that is crimped (mechanically coupled) to the busbar 24. The third mechanical coupling portion 65 is bent toward the second surface 60b side, sandwiching the busbar 24. That is, on the second surface 60b, the third mechanical coupling portion 65 is crimped (coupled, fixed) to the busbar 24. Alternatively, on the second surface 60b, the third mechanical coupling portion 65 may be joined (fixed) to the busbar 24 by welding.

[0036] The fastening terminal 70 (second terminal) is formed in a plate shape from a copper alloy or the like. The fastening terminal 70 has a second heat-bonded portion 71 that is welded to the lead wire 22. The second heat-bonded portion 71 is bent toward the busbar 24 side and sandwiches the busbar 24. In other words, the second heat-bonded portion 71 is crimped to the busbar 24. The second heat-bonded portion 71 is then welded to the busbar 24.

[0037] The fastening terminal 70 includes a second mechanical coupling portion 73 that is crimped (mechanically coupled) to the busbar 24 on the side of the connection terminal 60 than the second thermal coupling portion 71. The second mechanical coupling portion 73 is provided parallel to the second thermal coupling portion 71. The second mechanical coupling portion 73 is bent toward the busbar 24 side, sandwiching the busbar 24. In other words, the second mechanical coupling portion 73 is crimped (fixed) to the busbar 24. The second mechanical coupling portion 73 is not heated when it is crimped to the busbar 24.

[0038] The fastening terminal 70 has a fastening hole 70a through which a bolt or the like is passed. The fastening terminal 70 is placed on the terminal 44 provided on the terminal block 20, and the fastening terminal 70 is fastened (fixed) by passing a bolt or the like through the fastening hole 70a.

[0039] Incidentally, in the stator described in Patent Document 1, the lead wires extend from the stator coil in a direction away from the fastening terminals (terminal block), and the busbars extend from the connection point with the connecting terminals in a direction toward the fastening terminals. In other words, the lead wires and busbars extend away from the fastening terminals and then fold back toward the fastening terminals. As a result, the weight of the lead wires and busbars increases, which may reduce vibration resistance. Note that vibration loads are generated by the driving of electric vehicles, etc., and the rotation of the rotating electric machine 10, and the heavier the component, the greater the vibration load.

[0040] In this regard, the lead wire 22 and the bus bar 24 extend in the direction toward the fastening terminal 70 (terminal block 20) ​​from the stator coil 38. More specifically, the lead wire 22 extends in the direction toward the fastening terminal 70 from the stator coil 38. The bus bar 24 extends in the direction toward the fastening terminal 70 from the connection point with the connection terminal 60.

[0041] The embodiment described in detail above has the following advantages.

[0042] The connection terminal 60 is equipped with a first thermal joint 61 that is welded to the lead wire 22. Therefore, although the lead wire 22 and the first thermal joint 61 are firmly joined, there is a risk that the strength may decrease due to recrystallization caused by the heat during joining. In particular, copper is prone to crystallization and strength reduction due to heat. In this regard, the connection terminal 60 is equipped with a first mechanical joint 63 that is mechanically coupled to the lead wire 22 on the stator coil 38 side of the first thermal joint 61. Therefore, when vibration occurs in the stator 16, the vibration load acting on the lead wire 22 and the connection terminal 60 can be borne by the first mechanical joint 63. Furthermore, since the first mechanical joint 63 is mechanically coupled to the lead wire 22, it does not suffer strength reduction due to heat during joining. Thus, the vibration resistance of the stator 16 can be improved.

[0043] The lead wire 22 comprises a covered portion 56 in which the coil conductor 50 is covered with an insulating film 52, and a stripped portion 54 in which the coil conductor 50 is exposed. The first thermal joint 61 is joined to the stripped portion 54, and the first mechanical joint 63 is joined to the covered portion 56. Therefore, the first mechanical joint 63 can be joined to the covered portion 56, which has higher strength than the stripped portion 54, thereby further improving the vibration resistance of the stator 16.

[0044] The fastening terminal 70 includes a second thermal joint 71 joined to the busbar 24 by welding, and a second mechanical joint 73 that is mechanically connected to the busbar 24 on the connection terminal 60 side of the second thermal joint 71. Therefore, when vibration occurs in the stator 16, the vibration load acting on the busbar 24 and the fastening terminal 70 can be borne by the second mechanical joint 73. Furthermore, since the second mechanical joint 73 is mechanically connected to the busbar 24, it does not suffer a decrease in strength due to heat during connection. Thus, the vibration resistance of the stator 16 can be improved.

[0045] The connector 60 is formed in a plate shape and has a first surface 60a and a second surface 60b opposite to the first surface 60a. On the first surface 60a, the first thermal joint 61 is joined to the leader wire 22, and on the first surface 60a, the first mechanical joint 63 is joined to the leader wire 22. The busbar 24 is fixed to the second surface 60b. With this configuration, the leader wire 22 is located on the first surface 60a of the connector 60, and the busbar 24 is located on the second surface 60b opposite to the first surface 60a. Therefore, interference between the leader wire 22 and the busbar 24 can be suppressed compared to the case where the leader wire 22 and the busbar 24 are located on the same side of the plate-shaped connector 60. Consequently, there is no need to make the connector 60 unnecessarily large, and the connector 60 can be made smaller and lighter.

[0046] The lead wire 22 extends from the stator coil 38 toward the fastening terminal 70, and the bus bar 24 extends from the connection point with the connecting terminal 60 toward the fastening terminal 70. Therefore, both the lead wire 22 and the bus bar 24 extend toward the fastening terminal 70 (terminal block 20), and do not extend toward the fastening terminal 70 and then bend back toward the fastening terminal 70. Thus, it is possible to suppress an increase in the weight of the lead wire 22 and the bus bar 24, and to suppress a decrease in vibration resistance.

[0047] Furthermore, the above embodiment can also be implemented with the following modifications. Parts identical to those in the above embodiment are denoted by the same reference numerals, and their descriptions are omitted.

[0048] As shown in Figure 8, a configuration can also be adopted in which the lead wire 22 is drawn out radially outward from the coil end portion of the stator core 36. Even in this case, the lead wire 22 extends in the direction toward the fastening terminal 70 from the stator coil 38, and the bus bar 24 extends in the direction toward the fastening terminal 70 from the connection portion with the connection terminal 60. Therefore, it is possible to suppress an increase in the weight of the lead wire 22 and the bus bar 24, and to suppress a decrease in vibration resistance.

[0049] • A configuration can also be adopted in which the lead wire 22 and bus bar 24 extend away from the fastening terminal 70 and then fold back towards the fastening terminal 70.

[0050] The connection terminal 60 can also be configured such that, on the first surface 60a, the first thermal joint 61 is joined to the lead wire 22, the first mechanical joint 63 is connected to the lead wire 22 on the first surface 60a, and the busbar 24 is fixed to the first surface 60a. Similarly, a configuration can be adopted in which the first thermal joint 61, the first mechanical joint 63, and the busbar 24 are fixed to the second surface 60b.

[0051] The connection terminal 60 is formed in a rod shape and may include a first thermal joint 61, a first mechanical joint 63, and a third mechanical joint 65 as branching portions.

[0052] The first mechanical coupling portion 63 of the connection terminal 60 may be crimped (mechanically coupled) to the peeling portion 54.

[0053] The connection terminal 60 may also have a first thermal joint 61 that is joined to the lead wire 22 by heat crimping. In this case as well, the strength of the lead wire 22 and the connection terminal 60 may decrease due to the heat generated during joining, but the vibration load acting on the lead wire 22 and the connection terminal 60 can be borne by the first mechanical joint 63.

[0054] The fastening terminal 70 may also have a second thermal joint 71 that is joined to the busbar 24 by heat crimping. In this case as well, the strength of the busbar 24 and the fastening terminal 70 may decrease due to the heat generated during joining, but the vibration load acting on the busbar 24 and the fastening terminal 70 can be borne by the second mechanical joint 73.

[0055] • In the fastening terminal 70, a mechanical coupling portion similar to the second mechanical coupling portion 73 may be provided instead of the second thermal coupling portion 71. Alternatively, one of the second thermal coupling portion 71 and the second mechanical coupling portion 73 may be omitted.

[0056] The rotating electric machine 10 is not limited to an inner rotor structure; it may also have an outer rotor structure. [Explanation of symbols]

[0057] 10... Rotating electric machine, 16... Stator, 20... Terminal block, 22... Lead wire, 24... Busbar, 38... Stator coil, 60... Connection terminal, 61... First thermal joint, 63... First mechanical joint.

Claims

1. Applicable to a rotating electric machine (10) equipped with a terminal block (20), the stator (16) is equipped with a stator coil (38), The lead wire (22) drawn out from the stator coil, Bus bar (24) and, A first terminal (60) electrically connects the lead wire and the busbar, A second terminal (70) is electrically connected to the busbar and fixed to the terminal block, Equipped with, The stator of a rotating electric machine comprises a first terminal, a first thermal joint (61) joined to the lead wire by heat crimping or welding, a first mechanical joint (63) mechanically coupled to the lead wire on the stator coil side of the first thermal joint, and a third mechanical joint (65) coupled to the busbar.

2. The stator of a rotating electric machine according to Claim 1, wherein when the direction in which the lead wire extends from the first mechanical coupling portion is defined as the first direction and the direction in which the busbar extends from the third mechanical coupling portion is defined as the second direction, the first direction and the second direction are not parallel and are in different orientations.

3. The first terminal is formed in a plate shape, The first mechanical coupling portion is bent relative to the plate surface of the first terminal so as to clamp and crimp the lead wire from the side in the direction in which the lead wire extends, The third mechanical coupling portion is bent relative to the plate surface of the first terminal so as to clamp and crimp the busbar from the side in the direction in which the busbar extends, The bending direction of the third mechanical joint is different from the bending direction of the first mechanical joint. The stator of a rotating electric machine according to claim 1 or 2, wherein the third mechanical coupling portion is bent in the direction in which the lead wire extends from the first terminal.

4. The lead wire comprises a covered portion (56) in which the conductor (50) is covered with an insulating film (52), and an exposed portion (54) in which the conductor is exposed. The first thermally bonded portion is joined to the exposed portion, The stator of a rotating electric machine according to any one of claims 1 to 3, wherein the first mechanical coupling portion is coupled to the covering portion.

5. The stator of a rotating electric machine according to any one of claims 1 to 4, wherein the second terminal comprises a second thermal joint (71) joined to the busbar by heat scribing or welding, and a second mechanical joint (73) mechanically coupled to the busbar on the side of the second thermal joint closer to the first terminal.

6. The first terminal is formed in a plate shape and has a first surface (60a) and a second surface (60b) opposite to the first surface. On the first surface, the first thermal joint is joined to the leader wire, In the first surface, the first mechanical coupling is coupled to the leader wire. The busbar is fixed to the second surface, the stator of the rotating electric machine according to any one of claims 1 to 5.

7. The lead wire extends from the stator coil toward the second terminal, The stator of a rotating electric machine according to any one of claims 1 to 6, wherein the busbar extends in a direction toward the second terminal from the connection portion with the first terminal.

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