Rotary electrical machine and method for producing rotary electrical machine
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DENSO CORP
- Filing Date
- 2026-01-23
- Publication Date
- 2026-08-06
Smart Images
Figure JP2026002178_06082026_PF_FP_ABST
Abstract
Description
Rotating Electric Machine and Method for Manufacturing Rotating Electric Machine Cross - Reference to Related Applications
[0001] This application is based on Japanese Patent Application No. 2025 - 012906 filed in Japan on January 29, 2025, and the contents of the base application are incorporated herein by reference in their entirety.
[0002] The disclosure in this specification relates to a rotating electric machine and a method for manufacturing a rotating electric machine.
[0003] Patent Document 1 discloses a method for connecting a stranded conductor that can stably connect a stranded conductor and a metal terminal. More specifically, by energizing the metal terminal while pressurizing the joint portion between the metal terminal and the joint portion, the insulating resin at the joint portion is melted and the insulating resin is discharged from the joint portion. The description of the prior art document is incorporated herein by reference as an explanation of the technical elements in this specification.
[0004] Japanese Unexamined Patent Application Publication No. 2020 - 027726
[0005] In the configuration of the prior art document, each strand forming the stranded conductor does not necessarily contact the metal terminal. That is, the strand located innermost in the stranded conductor is in a state where the strands contact each other but do not directly contact the metal terminal. For this reason, the electrical resistance between the strand and the metal terminal tends to increase, and there is a risk that the energization becomes unstable. From the above viewpoints or other viewpoints not mentioned, further improvements are required for rotating electric machines and the like.
[0006] One disclosed object is to provide a rotating electric machine or the like with stable energization.
[0007] The above object is achieved by the combination of features described in the independent claims. Also, the dependent claims define further advantageous specific examples. The reference signs in parentheses described in the claims indicate the correspondence with the specific embodiments described later, and do not limit the disclosed technical scope. The objects, features, and effects disclosed in this specification will become clearer by referring to the subsequent detailed description and the attached drawings.
[0008] One disclosure for achieving the above objective is a rotating electric machine comprising a stator having a coil section, a rotor that rotates relative to the stator, and a conductor unit for supplying current to the coil section, wherein the conductor unit comprises a bundled conductor having a plurality of conductors and a terminal bundling the bundled conductor, the conductor comprises a wire section and a covering section covering the wire section, and all conductors are in a state where at least a portion of the wire section exposed from the covering section is in contact with the terminal.
[0009] According to the disclosed rotating electric machine, all conductors have at least a portion of the exposed wire portion in contact with the terminal. Therefore, a good electrical connection is maintained between the wire portion and the terminal. Consequently, a rotating electric machine with stable current flow can be provided.
[0010] One disclosure for achieving the above objective is a method for manufacturing a rotating electric machine comprising a stator having a coil section, a rotor that rotates relative to the stator, and a conductor unit for supplying current to the coil section, wherein the conductor unit comprises a bundled conductor having a plurality of conductors and a terminal bundling the bundled conductor, and the conductor comprises a wire section and a coating section covering the wire section, the method comprising an attachment step of attaching the terminal to the bundled conductor, a temporary crimping step of fixing the conductor unit to a pressurized current supply device, and a pressurized current supply step of pressurizing the conductor unit using the pressurized current supply device and supplying current to the conductor unit to remove a portion of the coating section and to bring at least a portion of all the wire sections into contact with the terminal.
[0011] The disclosed method for manufacturing a rotating electric machine includes a pressurizing and energizing step in which a conductor unit is pressurized using a pressurizing and energizing device, and an electric current is passed through the conductor unit to partially remove the insulation and bring at least a portion of all the strands into contact with the terminal. As a result, similar to the rotating electric machine described above, a good electrical connection between the strands and the terminal is maintained. Therefore, a method for manufacturing a rotating electric machine with stable energization can be provided.
[0012] This is a cross-sectional view of a rotating electric machine. This is a perspective view of a wire unit. This is a cross-sectional view taken along line III-III in Figure 2. This is a flowchart showing the manufacturing process. This is an explanatory diagram showing the temporary crimping process. This is an explanatory diagram showing the pressurized current application process. This is a top view showing the bundled wires in the second embodiment. This is a side view showing the bundled wires in the second embodiment. This is an explanatory diagram showing the temporary crimping process in the third embodiment. This is an explanatory diagram showing the pressurized current application process in the third embodiment. This is a cross-sectional view of a wire unit in the fourth embodiment. This is an explanatory diagram showing the temporary crimping process in the fourth embodiment. This is an explanatory diagram showing the pressurized current application process in the fourth embodiment. This is an explanatory diagram showing the temporary crimping process in the fifth embodiment. This is an explanatory diagram showing the pressurized current application process in the sixth embodiment. This is an explanatory diagram showing the temporary crimping process in the sixth embodiment.
[0013] Multiple embodiments will be described with reference to the drawings. In multiple embodiments, functionally and / or structurally corresponding and / or related parts may be given the same reference numeral, or reference numerals that differ by hundreds or more digits. For corresponding and / or related parts, refer to the description of other embodiments.
[0014] (First Embodiment) In Figure 1, the rotating electric machine 100 is an axial gap type motor. The rotating electric machine 100 can be attached to a moving body and used as a moving drive source that provides thrust to the moving body. The rotating electric machine 100 can be mounted on an aircraft, such as an aircraft flying in the atmosphere, and used as a device to rotate the propeller of the aircraft. The moving body may be an aircraft, a vehicle, a ship, construction machinery, or agricultural machinery.
[0015] The rotating electric machine 100 comprises a shaft 60, a stator 20, and a rotor 30. The shaft 60 supports the rotor 30. The shaft 60 rotates together with the rotor 30 around the rotation axis Cm. The centerline of the shaft 60 coincides with the rotation axis Cm. The stator 20 and the rotor 30 are arranged side by side in the axial direction AD, along which the rotation axis Cm, which is the axis of the rotating electric machine 100, extends. Figure 1 is a cross-sectional view of the rotating electric machine 100 cut along the rotation axis Cm of the rotor 30.
[0016] The circumferential direction CD is the direction of rotation of the rotating electric machine 100. The radial direction RD is the direction towards the shaft 60 or away from the shaft 60. The axial direction AD is also called the axial direction.
[0017] The stator 20 is a stator. The stator 20 comprises a plurality of coil units, each having a stator core 22 and a coil portion 21 wound around the stator core 22. The stator 20 is configured in an annular shape by arranging a plurality of coil units in the circumferential direction CD. The axis of rotation Cm coincides with the center line of the stator 20.
[0018] The rotor 30 is a rotor. The rotor 30 rotates relative to the stator 20. The rotor 30 rotates around the axis of rotation Cm. The axis of rotation Cm is the centerline of the rotor 30. The rotor 30 comprises a drive rotor and a rear rotor. The rotating electric machine 100 is a double-rotor type motor. The rotating electric machine 100 is sometimes called a double axial motor. The drive rotor and the rear rotor are arranged in the axial direction AD via the stator 20.
[0019] The rotor 30 comprises a magnet 31 and a magnet holder 36. The magnet holder 36 is disc-shaped. The magnet holder 36 is fixed to the shaft 60. The shaft 60 has a convex ring portion that protrudes radially RD outward from the cylindrical shaft body which forms the main body of the shaft 60. The convex ring portion is formed in the center of the axial direction AD.
[0020] The magnet 31 is embedded in a recess provided in the magnet holder 36 and is held in place by adhesive bonding. The magnet 31 is fixed to the shaft 60 via the magnet holder 36. Therefore, the rotor 30 rotates integrally with the shaft 60.
[0021] Multiple magnets 31 are arranged in the circumferential direction CD on the rotor 30. The magnets 31 are composed of permanent magnets and form a magnetic field. On the rotor 30, the magnets 31 generate magnetic flux. The magnets 31 are positioned opposite the stator 20 in the axial direction AD.
[0022] The rotating electric machine 100 is equipped with an axial gap 50. The axial gap 50 is the gap between the stator 20 and the rotor 30 in the axial direction AD. The axial gap 50 forms a disc-shaped space extending radially RD between the stator 20 and the rotor 30. The axial gap 50 includes the gap between the stator 20 and the drive-side rotor and the gap between the stator 20 and the rear-side rotor.
[0023] The rotating electric machine 100 is equipped with bearings 61. The bearings 61 rotatably support the shaft 60. The bearings 61 include a drive bearing fixed to the drive frame and a rear bearing fixed to the rear frame.
[0024] The rotating electric machine 100 includes a housing 40. The housing 40 includes an electric machine outer wall 41 and an end plate 45. The end plate 45 includes a drive frame and a rear frame. The drive frame is the end plate 45 attached to the side where the shaft 60 is connected to the drive object of the rotating electric machine 100. The rear frame is the end plate 45 attached to the side opposite to the drive frame. The housing 40 houses the stator 20 and the rotor 30.
[0025] The outer wall 41 of the electric motor is formed in a cylindrical shape and extends in the axial direction AD. The outer wall 41 of the electric motor covers the stator 20 and rotor 30 from the outer circumference. The end plate 45 is formed in a disc shape and extends in the radial direction RD.
[0026] Multiple heat dissipation fins 42 are formed on the outer surface of the electrical machine's outer wall 41, which is the side opposite to the internal space forming the housing 40. The heat dissipation fins 42 promote heat dissipation from the electrical machine's outer wall 41 to the air surrounding the rotating electrical machine 100.
[0027] The end plates 45 are arranged in the axial direction A through the electrical outer wall 41. The end plates 45 are fixed to the electrical outer wall 41 by fasteners such as bolts. The end plates 45 are attached to the open end of the electrical outer wall 41 and cover this open end from both sides in the axial direction A.
[0028] The drive frame has a connection terminal 49 on the side opposite to the internal space of the housing 40. The drive frame has an opening that connects the internal space and the external space of the housing 40. The connection terminal 49 and the coil section 21 are electrically connected by a conductor unit 90 that extends through the opening in the drive frame. The conductor unit 90 is a component for supplying current to the coil section 21.
[0029] The conductor unit 90 comprises a bundled conductor 70 and a terminal 80. The terminal 80 is equipped with a terminal side connection terminal 89, and the connection terminal 49 of the drive frame and the terminal side connection terminal 89 are electrically connected.
[0030] The conductor unit 90 protrudes from the internal space of the housing 40 to the external space through an opening in the drive frame. The coil section 21 is connected to the inverter via the conductor unit 90 and the connection terminal 49. By supplying alternating current to the coil section 21 by the inverter, an electromagnetic force is generated in the stator 20. This electromagnetic force generates an attractive or repulsive force in the magnet 31, causing the shaft 60 and rotor 30, which are rotatably supported by the end plate 45, to rotate. In this way, the rotating electric machine 100 is driven as a motor by the supply of power. The rotating electric machine 100 also functions as a generator during regeneration.
[0031] In Figure 2, the conductor unit 90 comprises a bundled conductor 70 having multiple conductors 72, and a terminal 80 that bundles the bundled conductors 70. In this figure, the bundled conductors 70 and the terminal 80 are in a state before they are joined together.
[0032] The terminal 80 is made of a highly conductive metal. The terminal 80 has two clamping surfaces: a first clamping surface 85 and a second clamping surface 86. The terminal 80 bundles the assembled conductors 70 by clamping them between the first clamping surface 85 and the second clamping surface 86. The direction in which the assembled conductors 70 are clamped by the terminal 80 is the Z direction. Hereafter, the Z direction may be referred to as the clamping direction.
[0033] The terminal 80 is equipped with a connecting portion 87. The connecting portion 87 connects the first clamping surface portion 85 and the second clamping surface portion 86. The connecting portion 87 is bent in a U-shape, with one end connected to the Y-direction end of the first clamping surface portion 85 and the other end connected to the Y-direction end of the second clamping surface portion 86.
[0034] The terminal 80 is equipped with a claw portion 88. The claw portion 88 protrudes in a direction intersecting the first clamping surface portion 85 and the second clamping surface portion 86. The claw portion 88 is provided continuously from the first clamping surface portion 85 and protrudes in a direction approaching the second clamping surface portion 86. The terminal 80, with the first clamping surface portion 85, the second clamping surface portion 86, the connecting portion 87, and the claw portion 88, surrounds the assembled conductor 70 in one complete circle.
[0035] Terminal 80 is equipped with a terminal connection terminal 89. The terminal connection terminal 89 is the part for electrically connecting to the connection terminal 49. The terminal connection terminal 89 extends in the X direction, which is the longitudinal direction of the manifold 70.
[0036] The multiple conductors 72 forming the combined conductor 70 are so-called flat wires with a rectangular cross-section. However, the shape of the conductors 72 is not limited to flat wires; round wires with a circular cross-section may also be used. The multiple conductors 72 are all the same shape. However, their cross-sectional shapes may differ.
[0037] Two conductors 72 are arranged side by side in the Z direction. In other words, the two conductors 72 are clamped side by side in the clamping direction by the first clamping surface 85 and the second clamping surface 86. The conductor 72 in contact with the first clamping surface 85 is the first conductor 72a, and the conductor 72 in contact with the second clamping surface 86 is the second conductor 72b. It can also be said that of the multiple conductors 72 arranged in the Z direction, the conductor 72 closer to the first clamping surface 85 is the first conductor 72a, and the conductor 72 closer to the second clamping surface 86 is the second conductor 72b. The first conductor 72a is not in direct contact with the second clamping surface 86. Also, the second conductor 72b is not in direct contact with the first clamping surface 85.
[0038] Six conductors 72 are arranged in the Y direction along the first clamping surface 85 or the second clamping surface 86. Hereafter, the Y direction, which is the direction in which multiple conductors 72 are arranged along the first clamping surface 85 or the second clamping surface 86, may be referred to as the "arrangement direction." The bundled conductor 70 is composed of a total of 12 conductors 72, with two arranged in the Z direction and six in the Y direction. However, the number of conductors 72 constituting the bundled conductor 70 can be multiple, and is not limited to the example described above.
[0039] In Figure 3, the conductor 72 comprises a wire portion 73 and a covering portion 74. The wire portion 73 is the part of the conductor 72 through which electricity flows. The wire portion 73 is made of a metal with high conductivity. On the other hand, the covering portion 74 is the part that protects the wire portion 73 by covering it, and is a part through which electricity does not flow. The covering portion 74 is made of a resin with electrical insulating properties.
[0040] Since the conducting wire 72 is covered by the covering portion 74, electricity does not flow between the conducting wire 72 and the terminal 80 in the state shown in FIG. 3. Also, electricity does not flow between adjacent conducting wires 72 either.
[0041] The six first conducting wires 72a arranged in the arrangement direction constitute the first conducting wire group 72Ga. On the other hand, the six second conducting wires 72b arranged in the arrangement direction constitute the second conducting wire group 72Gb.
[0042] The size Ws in the Y direction in the gap between the connecting portion 87 and the conducting wire 72 is smaller than the size Wd in the Y direction of one conducting wire 72. In other words, in the gap formed between the connecting portion 87 and the conducting wire 72, no conducting wire 72 can enter.
[0043] The claw portion 88 is formed with a chamfered portion 88m. The chamfered portion 88m is a chamfered portion formed at the corner of the claw portion 88. By forming the chamfered portion 88m, it is possible to suppress the situation where the corner of the claw portion 88 catches during pressurization in the pressurized energization process described later and it cannot be appropriately crushed. The size Wt in the Y direction of the chamfered portion 88m is smaller than the size in the Z direction of one conducting wire 72. By making the size in the Y direction of the chamfered portion 88m smaller to some extent in this way, it is easy to suppress the biting of the conducting wire 72.
[0044] The angle θa formed between the claw portion 88 and the first clamping surface portion 85 is larger than a right angle. That is, the angle θa formed between the claw portion 88 and the first clamping surface portion 85 is an obtuse angle.
[0045] Among the manufacturing methods of the rotating electric machine 100, the process of manufacturing the conducting wire unit 90 by joining the collective conducting wire 70 and the terminal 80 will be described below.
[0046] When starting the manufacturing process in FIG. 4, the attachment process is executed in step S101. In the attachment process, the terminal 80 is attached to an appropriate position of the collective conductor 70. More specifically, the terminal 80 is attached such that the collective conductor 70 is positioned between the first clamping surface portion 85 and the second clamping surface portion 86 of the terminal 80. After attaching the terminal 80 to the collective conductor 70, the process proceeds to step S102.
[0047] In step S102, a temporary caulking process is executed. As shown in FIG. 5, in the temporary caulking process, the conductor unit 90 is sandwiched in the Z direction by the pressure and energization device 10. The pressure and energization device 10 is a device that can apply pressure in the Z direction and crush the sandwiched member. The pressure and energization device has members that contact the member in contact with the first clamping surface portion 85 and the member in contact with the second clamping surface portion 86. The direction in which the conductor unit 90 is sandwiched by the pressure and energization device 10 and the direction in which the terminal 80 sandwiches the collective conductor 70 are the same direction. By the temporary caulking process, the position of the conductor unit 90 with respect to the pressure and energization device 10 is fixed.
[0048] In the temporary caulking process, the first conductor group 72Ga is in contact with the first clamping surface portion 85. On the other hand, the second conductor group 72Gb is in contact with the second clamping surface portion 86. In other words, in the temporary caulking process, all the conductors 72 are in contact with at least one of the clamping surface portions of the first clamping surface portion 85 and the second clamping surface portion 86. In the temporary caulking process, it can be said that the conductors 72 are arranged in two stages side by side in the Z direction.
[0049] All the conductors 72 have the same size in the Z direction. Therefore, the size H72a in the Z direction of the first conductor group 72Ga and the size H72b in the Z direction of the second conductor group 72Gb are the same size. Therefore, the collective conductor 70 has the same size in the Z direction throughout the range sandwiched by the terminal 80. Thus, the first clamping surface portion 85 and the second clamping surface portion 86 are in a parallel state. After completion of the temporary caulking process, the process proceeds to step S103 while maintaining the temporarily caulked state.
[0050] In step S103, the pressurizing and energizing process is performed. As shown in Figure 6, in the pressurizing and energizing process, the terminal 80 is pressurized in the Z direction using the pressurizing and energizing device 10, and the conductor unit 90 is energized. In the pressurizing and energizing process, a greater force is applied in the Z direction than in the temporary crimping process, so the terminal 80 is crushed in the Z direction. Also, when the conductor unit 90 is energized, Joule heat is generated as a result of the energization, and the coating portion 74 melts. In other words, the coating portion 74 is removed by performing the pressurizing and energizing process. As a result, only the wire portion 73 remains in the part sandwiched by the terminal 80.
[0051] By performing the pressurized current application process, the coating portion 74 is removed, and the first wire portion 73a, which is the wire portion 73 of the first conductor 72a, comes into contact with the first clamping surface portion 85. In other words, the first wire portion 73a and the terminal 80 are diffusely bonded, and a good electrical connection is maintained. Similarly, the second wire portion 73b, which is the wire portion 73 of the second conductor 72b, comes into contact with the second clamping surface portion 86. In other words, the second wire portion 73b and the terminal 80 are diffusely bonded, and a good electrical connection is maintained. In summary, at least a portion of all wire portions 73 comes into contact with the terminal 80, and a good electrical connection is maintained between the wire portion 73 and the terminal 80.
[0052] Furthermore, by performing the pressurization and energization process, the first wire section 73a and the second wire section 73b come into contact with each other. In other words, a good electrical connection is maintained between the first wire section 73a and the second wire section 73b. During the pressurization and energization process, the wire sections 73 can be said to be arranged in two stages side by side in the Z direction.
[0053] After the pressurization and energization process is completed, the pressurization and energization are released. Since the diffusion bonding is complete after the pressurization and energization process, the contact state between the components that was in contact during the pressurization and energization process will be maintained even after the pressurization and energization are released.
[0054] The magnitude H73a of the first wire group 73Ga in the Z direction and the magnitude H73b of the second wire group 73Gb in the Z direction are the same. Therefore, it can be said that the first clamping surface 85 and the second clamping surface 86 are parallel to each other.
[0055] As a result of the pressurized current application process, the portion of the bundled conductor 70 sandwiched between the terminals 80 is compressed and reduced in size in the Z direction. Also, because the insulation portion 74 is removed, gaps are formed between adjacent strands 73 in the Y direction. On the other hand, the portion of the bundled conductor 70 not sandwiched between the terminals 80 has not had its insulation portion 74 removed, and therefore there is no change in size before and after the pressurized current application process.
[0056] Although the manufacturing method for the rotating electric machine 100 has been described, since it is a manufacturing process for a part of the rotating electric machine 100 that is particularly related to the wire unit 90, the above manufacturing method can also be said to be a manufacturing method for the wire unit 90. Furthermore, the wire unit 90 can also be said to be a part of the stator 20. For this reason, the above manufacturing method can also be said to be a manufacturing method for the stator 20.
[0057] The effects of the above-described embodiment will now be explained. According to the above-described embodiment, all conductors 72 have at least a portion of the exposed strand portion 73 from the covering portion 74 in contact with the terminal 80. Therefore, it is easier to ensure a stable electrical connection compared to the case where there are conductors 72 that are not in contact with the terminal 80. Consequently, it is easier to provide a rotating electric machine 100 with stable current flow.
[0058] The first wire portion 73a, which is in contact with the first clamping surface portion 85, and the second wire portion 73b, which is in contact with the second clamping surface portion 86, are aligned in the clamping direction of the terminal 80. Therefore, the first wire portion 73a is joined to both the first clamping surface portion 85 and the second wire portion 73b. Also, the second wire portion 73b is joined to both the second clamping surface portion 86 and the first wire portion 73a. Consequently, the joint between the wire portion 73 and the terminal 80 is easily made strong.
[0059] The method includes a pressurizing and energizing step in which the bundled conductor 70 is pressurized using a pressurizing and energizing device 10, and energized, thereby partially removing the insulation portion 74 and bringing at least a portion of all the individual wire portions 73 into contact with the terminal 80. Therefore, it is easier to ensure a stable electrical connection compared to the case where the individual wire portions 73 and the terminal 80 are not in contact. Thus, it is easier to provide a method for manufacturing a rotating electric machine with stable energization.
[0060] In the temporary crimping process, the wire unit 90 is fixed to the pressurized energizing device 10 so that the first wire 72a and the second wire 72b are aligned in the clamping direction of the terminal 80. As a result, the pressurizing force applied in the clamping direction is applied in a direction that brings the first clamping surface 85 closer to the first wire portion 73a, and also in a direction that brings the second clamping surface 86 closer to the second wire portion 73b. This makes it easier to create a strong bond between the wire portion 73 and the terminal 80.
[0061] In the temporary crimping process, the wire unit 90 is fixed to the pressurized energizing device 10 with at least a portion of all the wires 72 in contact with the terminal 80. Therefore, compared to the case where the wire unit 90 is fixed to the pressurized energizing device 10 with some of the wires 72 not in contact with the terminal 80, it is easier to ensure that the wire portion 73 and the terminal 80 are in contact when the pressurized energizing process is performed. In addition, it is easier to suppress the unintended displacement of the wires 72 due to the force applied in the clamping direction when pressurizing during the pressurized energizing process.
[0062] In the temporary crimping process, the clamping size H72a of the first conductor 72a and the clamping size H72b of the second conductor 72b are the same, and the clamping size of the bundled conductor 70 is the same throughout the entire area clamped by the terminal 80. Therefore, compared to the case where the clamping size of the bundled conductor 70 is not constant, it is easier to bring the strand portion 73 and the terminal 80 into contact when the pressurized current application process is performed.
[0063] In the temporary crimping process, the wire unit 90 is fixed to the pressurized energizing device 10 with the Y-direction Ws from the wire 72 closest to the connection part 87 to the connection part 87 being smaller than the Y-direction Wd of one wire 72. This makes it easier to prevent the position of the wires 72 from shifting in the Y-direction even when pressure is applied in the Z-direction, which is the clamping direction, during the temporary crimping and pressurized energizing processes. Consequently, it is easier to maintain the wires 72 aligned in the Z-direction and complete the joining of the bundled wires 70 and the terminal 80.
[0064] In the temporary crimping process, the claw portion 88 is provided with a chamfered portion 88m at the end closest to the bundled conductor 70, which is smaller than the width of one conductor 72. This makes it easier to prevent the conductor 72 from being accidentally pinched between the claw portion 88 and the second clamping surface portion 86 during the temporary crimping process and the pressurized current application process. Therefore, the temporary crimping process and the pressurized current application process can be performed properly.
[0065] In the temporary crimping process, the wire unit 90 is fixed to the pressurized current supply device 10 with the angle θa of the claw portion 88 to the first clamping surface portion 85, which is the surface on which the claw portion 88 is provided, being obtuse. Therefore, in the pressurized current supply process after the temporary crimping process, when the claw portion 88 is crushed in the Z direction, the tip portion of the claw portion 88 is easily pushed out on the opposite side from the bundled wire 70. Consequently, in the pressurized current supply process, it is easier to prevent a situation where the claw portion 88 resists the force crushing it in the Z direction, and the bundled wire 70 cannot be properly pressurized.
[0066] (Second Embodiment) This embodiment is a modification based on the preceding embodiment. In this embodiment, the bundled conductor is a stranded wire 270 made by twisting together a plurality of conductors 72.
[0067] In Figure 7, the stranded wire 270 extends in the X direction with multiple conductors 72 twisted together so as to wrap around each other. In other words, the stranded wire 270 is formed in a linear shape with multiple conductors 72 tightly twisted together. The stranded wire 270 is formed with six conductors 72 arranged in the Y direction.
[0068] In Figure 8, the stranded wire 270 is formed by two conductors 72 arranged side by side in the Z direction. On its side, the stranded wire 270 has portions that do not contact either the first clamping surface 85 or the second clamping surface 86. More specifically, a side transition length Ly is required from the state where it no longer contacts the second clamping surface 86 side to the state where it begins to contact the first clamping surface 85 side. The size Lt of the terminal 80 in the X direction is at least greater than the side transition length Ly. Therefore, all conductors 72 making up the stranded wire 270 will contact the terminal 80 at some point. Consequently, in the pressurizing and energizing process, at least a portion of all the strands 73 can be brought into contact with either the first clamping surface 85 or the second clamping surface 86. Preferably, the size Lt of the terminal 80 in the X direction is the side transition length Ly plus a margin.
[0069] The effects of the above-described embodiment will now be explained. According to the above-described embodiment, the bundled conductor is a stranded wire 270 in which conductors 72 are twisted together. Here, the stranded wire 270 is less prone to length differences compared to conductors 72 that are not twisted together. That is, in the process of twisting multiple conductors 72 in a spiral shape, they are wound with a constant tension, so the length of the conductors 72 is easily kept uniform. For this reason, differences in electrical resistance are less likely to occur compared to when the stranded wire 270 is not used, and it is easier to suppress situations in which circulating current flows in the stranded wire 270 due to differences in electrical resistance.
[0070] (Third Embodiment) This embodiment is a modification based on the preceding embodiment. In this embodiment, the conductor 372 is a round wire, and the bundled conductor 370 is a 7-parallel wire 370p made up of seven conductors. In addition, during the pressurization process, the conductors 372 are pressurized so that they are aligned in a line.
[0071] In Figure 9, the conductor 372 comprises a strand portion 373 with a circular cross-section and a covering portion 374 that covers the strand portion 373. The conductor 372 is a wire known as a round wire.
[0072] A 7-parallel wire 370p is formed using a total of 7 conductors 372: one conductor 372 and six conductors 372 arranged around it. The 7-parallel wire 370p is a bundled conductor 370 formed by bundling together the 7 conductors 372. The bundled conductor 370 is formed by three 7-parallel wires 370p. However, the number of 7-parallel wires 370p forming the bundled conductor 370 is not limited to three; it may be more than three or less than three.
[0073] The explanation described an example where seven round wires are used to form a seven-parallel wire 370p, but the conductors 372 forming the seven-parallel wire 370p are not limited to round wires. For example, seven flat rectangular wires may be used to form the seven-parallel wire 370p.
[0074] In the temporary crimping process, the 7-parallel wire 370p maintains its shape. The sizes of the 7-parallel wires 370p are equal to each other. In the temporary crimping process, of the seven conductors 372 that make up the 7-parallel wire 370p, at least one conductor 372 located in the center does not come into contact with both the first clamping surface portion 85 and the second clamping surface portion 86.
[0075] In Figure 10, during the pressurization and energization process, the 7-parallel wire 370p is crushed in the Z direction, and the coating 374 is removed by the action of Joule heat generated by the energization. As a result, 21 strands 373 corresponding to the total of 21 conductors 372 contained in the three 7-parallel wires 370p are clamped in the terminal 80. The strands 373 clamped in the terminal 80 are arranged in a single line in the Y direction.
[0076] Since the diameters of each wire portion 373 are equal, the dimensions of each wire portion 373 in the Z direction are the same. Each wire portion 373 is in contact with both the first clamping surface portion 85 and the second clamping surface portion 86, and is diffusely bonded.
[0077] The effects of the above-described embodiment will now be explained. According to the above-described embodiment, in the pressurizing and energizing process, the wire unit 90 is pressurized so that the strands 373 in contact with the terminal 80 are in a line. Therefore, even if there are wires 372, such as the seven-parallel wire 370p, that do not come into contact with either the first clamping surface 85 or the second clamping surface 86 in the temporary crimping process, all the strands 373 can be brought into contact with both the first clamping surface 85 and the second clamping surface 86.
[0078] (Fourth Embodiment) This embodiment is a modification based on the preceding embodiment. In this embodiment, the conductor assembly 470 comprises a large conductor 472L, a medium conductor 472M, and a small conductor 472S. The terminal 480 also comprises a protruding portion 481.
[0079] In Figure 11, the large conductor 472L is larger in the Z direction than the medium conductor 472M and the small conductor 472S. Two large conductors 472L are provided side by side in the Z direction and two in the Y direction. The large conductors 472L are provided closer to the claw portion 88 than to the connection portion 87.
[0080] The medium conductor 472M is larger in the Z direction than the small conductor 472S, and smaller in the Z direction than the large conductor 472L. Two medium conductors 472M are arranged side by side in the Z direction and two in the Y direction.
[0081] The small wire 472S is smaller in the Z direction than the large wire 472L and the medium wire 472M. Two small wires 472S are provided side by side in the Z direction and two in the Y direction. The small wires 472S are provided closer to the connection part 87 than to the claw part 88.
[0082] The size HM in the Z direction of the section where two medium conductors 472M are placed side by side is smaller than the size HL in the Z direction of the section where two large conductors 472L are placed side by side, and larger than the size HS in the Z direction of the section where two small conductors 472S are placed side by side. In other words, the combined conductor 470 is arranged in a stepped manner such that its size in the Z direction increases as it moves away from the connection part 87 and towards the claw part 88.
[0083] The terminal 480 is provided with a projection 481 that protrudes from the first clamping surface 85 toward the second clamping surface 86. The amount of projection of the projection 481 varies depending on the size of the bundled conductor 470 in the Z direction. Of the projection 481, the projection amount Tmin of the portion facing the medium conductor 472M in the Z direction is smaller than the projection amount Tmax of the portion facing the small conductor 472S in the Z direction. In other words, the projection 481 is provided in a stepped manner such that the amount of projection increases as it approaches the connection portion 87 from the claw portion 88. The size HM in the Z direction of the portion where the two medium conductors 472M are side by side, plus the projection amount Tmin of the portion of the projection 481 facing the medium conductors 472M in the Z direction, is equal to the size HL in the Z direction of the portion where the two large conductors 472L are side by side. The sum of the size HS in the Z direction of the portion where the two small wires 472S are side by side, and the protrusion amount Tmax of the portion of the protrusion 481 facing the small wires 472S in the Z direction, is equal to the size HL in the Z direction of the portion where the two large wires 472L are side by side.
[0084] In Figure 12, during the temporary crimping process, one of the two large conductors 472L, which are aligned in the Z direction, is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. Similarly, one of the two medium conductors 472M, which are aligned in the Z direction, is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. Furthermore, one of the two small conductors 472S, which are aligned in the Z direction, is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86.
[0085] The assembled conductor 470 comprises a first conductor group 472Ga that is in contact with the first clamping surface 85 and a second conductor group 472Gb that is in contact with the second clamping surface 86.
[0086] In Figure 13, during the pressurization and energization process, one of the two large strands 473L arranged in the Z direction is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. Similarly, one of the two medium strands 473M arranged in the Z direction is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. Furthermore, one of the two small strands 473S arranged in the Z direction is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. In other words, the strands 473 arranged in a stepped pattern and the stepped projections 481 are in contact with each other.
[0087] Of the individual wire portions 473, those in contact with the first clamping surface portion 85 are the first individual wire group 473Ga. On the other hand, of the individual wire portions 473, those in contact with the second clamping surface portion 86 are the second individual wire group 473Gb. Each individual wire portion 473 is classified into either the first individual wire group 473Ga or the second individual wire group 473Gb. In other words, every individual wire portion 473 is either the first individual wire group 473Ga or the second individual wire group 473Gb, and there are no individual wire portions that do not come into contact with either the first clamping surface portion 85 or the second clamping surface portion 86.
[0088] The effects of the above-described embodiment will now be explained. According to the above-described embodiment, in the temporary crimping process, the size of the clamping direction of the bundled conductor 470 differs in at least a portion of the area clamped by the terminal 480. Furthermore, the smaller the size of the clamping direction of the bundled conductor 470, the larger the protruding portion 481 comes into contact with it, so that at least a portion of all the conductors 472 come into contact with the terminal 480, and the conductor unit 90 is fixed to the pressurized energizing device 10. For this reason, it is easy to bring the bundled conductor 470 and the protruding portion 481 into contact during the pressurized energizing process. Therefore, it is easy to maintain a good state in which all the individual wires 473 come into contact with the terminal 480 and are electrically connected.
[0089] (Fifth Embodiment) This embodiment is a modification based on the preceding embodiment. In this embodiment, during the temporary crimping process, the distance between the first clamping surface portion 85 and the second clamping surface portion 86 increases as it approaches the claw portion 588 from the connecting portion 587.
[0090] In Figure 14, the terminal 580 includes a connecting portion 587 and a claw portion 588. In the temporary crimping process, the connecting portion 587 is smaller in size in the Z direction than the claw portion 588. For this reason, the separation distance from the first clamping surface portion 85 to the second clamping surface portion 86 is configured to increase as it moves away from the connecting portion 587 and closer to the claw portion 588. The first clamping surface portion 85 and the second clamping surface portion 86 are not parallel to each other, and the intersection line of the plane extended from the first clamping surface portion 85 and the plane extended from the second clamping surface portion 86 is located closer to the connecting portion 587 than to the claw portion 588. The inner diameter of the connecting portion 587 is smaller than the average value of the size of the assembled conductor 470 in the Z direction.
[0091] In the temporary crimping process, the second group of wires 472Gb is in contact with the second clamping surface 86, but the first group of wires 472Ga is not in contact with the first clamping surface 85. In other words, the first group of wires 472Ga is not in contact with any part of the terminal 580 and is resting on top of the second group of wires 472Gb.
[0092] In Figure 15, during the pressurization and energization process, the first group of wires 473Ga is in contact with the first clamping surface 85. On the other hand, the second group of wires 473Gb is in contact with the second clamping surface 86.
[0093] In the pressurized and energized process, the distance between the first clamping surface 85 and the second clamping surface 86 is configured to increase as it moves away from the connection portion 587 and closer to the claw portion 588. However, the distance is smaller than the distance in the temporary crimping process, and the inclination of the first clamping surface 85 with respect to the second clamping surface 86 is smaller than the inclination at the time of the temporary crimping process. In other words, the first clamping surface 85 and the second clamping surface 86 are closer to being parallel compared to the time of the temporary crimping process.
[0094] The effects of the above-described embodiment will now be explained. According to the above-described embodiment, in the temporary crimping process, the size of the bundled conductor 470 in the clamping direction increases as it moves away from the connection portion 587 toward the claw portion 588. Furthermore, in the temporary crimping process, the terminal 580 fixes the conductor unit 90 to the pressurized energizing device 10 with the separation distance in the clamping direction between the first clamping surface portion 85 and the second clamping surface portion 86 increasing as it moves away from the connection portion 587 toward the claw portion 588. Therefore, the first clamping surface portion 85 and the second clamping surface portion 86 can be aligned to clamp the bundled conductor 470, which gradually increases in size as it moves away from the connection portion 587 toward the claw portion 588. Thus, even if the bundled conductor 470 has different sizes in the clamping direction, it is easy to stably clamp it and perform the pressurized energizing process.
[0095] (Sixth Embodiment) This embodiment is a modification based on the preceding embodiment. In this embodiment, during the temporary crimping process, the distance between the first clamping surface portion 85 and the second clamping surface portion 86 decreases as it moves away from the connecting portion 687 and closer to the claw portion 688.
[0096] In Figure 16, the terminal 680 includes a connecting portion 687 and a claw portion 688. In the temporary crimping process, the connecting portion 687 is larger in the Z direction than the claw portion 688. For this reason, the distance between the first clamping surface portion 85 and the second clamping surface portion 86 is configured to decrease as it moves away from the connecting portion 687 and closer to the claw portion 688. The first clamping surface portion 85 and the second clamping surface portion 86 are not parallel to each other, and the intersection line of the extended surface of the first clamping surface portion 85 and the extended surface of the second clamping surface portion 86 is located closer to the claw portion 688 than to the connecting portion 687. The inner diameter of the connecting portion 687 is larger than the average value of the Z direction dimensions of the assembled conductor 670.
[0097] The conductor 672 comprises a large conductor 672L, a medium conductor 672M, and a small conductor 672S. The large conductor 672L is larger in the Z direction than the medium conductor 672M and the small conductor 672S. Two large conductors 672L are provided side by side in the Z direction and two in the Y direction. The large conductors 672L are provided closer to the connection portion 687 than to the claw portion 688.
[0098] The medium conductor 672M is larger in the Z direction than the small conductor 672S, and smaller in the Z direction than the large conductor 672L. Two medium conductors 672M are arranged side by side in the Z direction and two in the Y direction.
[0099] The small wire 672S is smaller in the Z direction than the large wire 672L and the medium wire 672M. Two small wires 672S are provided side by side in the Z direction and two in the Y direction. The small wires 672S are provided closer to the claw portion 688 than to the connection portion 687. The wires 672 are provided in a stepped manner, with their size in the Z direction gradually decreasing as they move away from the connection portion 687 and towards the claw portion 688.
[0100] In the temporary crimping process, the second group of wires 672Gb is in contact with the second clamping surface 86, but the first group of wires 672Ga is not in contact with the first clamping surface 85. In other words, the first group of wires 672Ga is not in contact with any part of the terminal 680 and is resting on top of the second group of wires 672Gb.
[0101] In Figure 17, during the pressurization and energization process, one of the two large strands 673L aligned in the Z direction is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. Similarly, one of the two medium strands 673M aligned in the Z direction is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. Furthermore, one of the two small strands 673S aligned in the Z direction is in contact with the first clamping surface 85, and the other is in contact with the second clamping surface 86. In other words, the strands 673 and terminal 680 are in contact with each other, arranged in a stepped pattern where the size in the Z direction gradually decreases as you move away from the connection part 687 towards the claw part 688.
[0102] Of the individual wire portions 673, those in contact with the first clamping surface portion 85 are the first individual wire group 673Ga. On the other hand, of the individual wire portions 673, those in contact with the second clamping surface portion 86 are the second individual wire group 673Gb. Each individual wire portion 673 is classified into either the first individual wire group 673Ga or the second individual wire group 673Gb. In other words, every individual wire portion 673 is either the first individual wire group 673Ga or the second individual wire group 673Gb, and there are no individual wire portions that do not come into contact with either the first or second clamping surface portion 85.
[0103] In the pressurized and energized process, the distance between the first clamping surface 85 and the second clamping surface 86 is configured to decrease as it moves away from the connection portion 687 and closer to the claw portion 688. However, the distance is smaller than the distance in the temporary crimping process, and the inclination of the first clamping surface 85 with respect to the second clamping surface 86 is smaller than the inclination at the time of the temporary crimping process. In other words, compared to the time of the temporary crimping process, the first clamping surface 85 and the second clamping surface 86 are closer to being parallel.
[0104] The effects of the above-described embodiment will now be explained. According to the above-described embodiment, in the temporary crimping process, the size of the bundled conductor 670 in the clamping direction decreases as it moves away from the connection portion 687 toward the claw portion 688. Furthermore, in the temporary crimping process, the terminal 680 fixes the conductor unit 90 to the pressurized energizing device 10 with the separation distance in the clamping direction between the first clamping surface portion 85 and the second clamping surface portion 86 decreasing as it moves away from the connection portion 687 toward the claw portion 688. Therefore, the first clamping surface portion 85 and the second clamping surface portion 86 can be aligned to clamp the bundled conductor 670, which gradually decreases in size as it moves away from the connection portion 687 toward the claw portion 688. Thus, even if the bundled conductor 670 has different sizes in the clamping direction, it is easy to stably clamp it and perform the pressurized energizing process.
[0105] (Other Embodiments) The disclosures in this specification and drawings are not limited to the exemplary embodiments. The disclosures include the exemplary embodiments and variations thereof by those skilled in the art. For example, the disclosures are not limited to combinations of parts and / or elements shown in the embodiments. The disclosures are implementable in a variety of combinations. The disclosures may have additional parts that can be added to the embodiments. The disclosures include those in which parts and / or elements of the embodiments have been omitted. The disclosures include substitutions or combinations of parts and / or elements between one embodiment and another. The scope of the disclosed technical areas is not limited to the descriptions of the embodiments. Some of the scope of the disclosed technical areas are indicated by the descriptions of the claims and should be understood to include all modifications within the meaning and scope equivalent to the descriptions of the claims.
[0106] The disclosures in the specification and drawings are not limited by the claims. The disclosures in the specification and drawings encompass the technical ideas described in the claims and extend to a wider and more diverse range of technical ideas than those described in the claims. Therefore, a variety of technical ideas can be extracted from the disclosures in the specification and drawings without being bound by the claims.
[0107] (Disclosure of Technical Ideas) This specification discloses several technical ideas as described in the following paragraphs. Some paragraphs may be written in a multiple dependent form, where subsequent paragraphs optionally refer to preceding paragraphs. Furthermore, some paragraphs may be written in a multiple dependent form, where they refer to other multiple dependent forms. These paragraphs written in multiple dependent forms define several technical ideas.
[0108] (Technical Concept 1) A rotating electric machine comprising: a stator (20) having a coil section (21); a rotor (30) that rotates relative to the stator; and a conductor unit (90) for supplying current to the coil section, wherein the conductor unit comprises a bundled conductor (70, 270, 370, 470, 670) having a plurality of conductors (72, 372, 472, 672); and terminals (80, 480, 580, 680) bundling the bundled conductor, wherein the conductor comprises a strand section (73, 373, 473, 673) and a covering section (74, 374) covering the strand section, and all of the conductors are in a state in which at least a portion of the strand section exposed from the covering section is in contact with the terminal.
[0109] (Technical Concept 2) The rotating electric machine according to Technical Concept 1, wherein the terminal comprises a first clamping surface portion (85) and a second clamping surface portion (86) that are provided facing each other, and the plurality of wire portions are arranged in the clamping direction of the terminal, with a first wire portion (73a) in contact with the first clamping surface portion and a second wire portion (73b) in contact with the second clamping surface portion.
[0110] (Technical idea 3) The rotating electric machine according to technical idea 2, wherein the terminal has a projection (481) that protrudes toward the wire portion from at least one of the first clamping surface portion and the second clamping surface portion.
[0111] (Technical idea 4) The rotating electric machine according to technical idea 2, wherein the bundled conductor is a stranded wire (270) in which the conductors are twisted together.
[0112] (Technical Idea 5) A method for manufacturing a rotating electric machine (100) comprising: a stator (20) having a coil section (21); a rotor (30) that rotates relative to the stator; a wire unit (90) for supplying current to the coil section, wherein the wire unit comprises a bundled wire (70, 270, 370, 470, 670) having a plurality of wires (72, 372, 472, 672); a terminal (80, 480, 580, 680) bundling the bundled wire; and the wire comprising strand sections (73, 373, 473, 673) and covering sections (74, 374) covering the strand sections, comprising: an attachment step (S101) of attaching the terminal to the bundled wire; and a temporary crimping step (S102) of fixing the wire unit to a pressurized current supply device (10). A method for manufacturing a rotating electric machine, comprising a pressurizing and energizing step (S103) in which the conductor unit is pressurized using the pressurizing and energizing device and energized, thereby partially removing the coating and bringing at least a portion of all the strands into contact with the terminal.
[0113] (Technical Idea 6) The method for manufacturing a rotating electric machine according to Technical Idea 5, wherein the terminal comprises a first clamping surface portion (85) and a second clamping surface portion (86) provided opposite to each other, and in the temporary crimping step, the wire unit is fixed to the pressurized energizing device such that a first wire (72a) in contact with the first clamping surface portion and a second wire (72b) in contact with the second clamping surface portion are aligned in the clamping direction of the terminal.
[0114] (Technical idea 7) A method for manufacturing a rotating electric machine according to technical idea 6, wherein in the temporary crimping step, the wire unit is fixed to the pressurized energizing device with at least a portion of all of the wires in contact with the terminal.
[0115] (Technical idea 8) A method for manufacturing a rotating electric machine according to technical idea 6 or technical idea 7, wherein in the temporary crimping step, the size of the first conductor in the clamping direction and the size of the second conductor in the clamping direction are the same, and the size of the bundled conductor in the clamping direction is the same throughout the entire area clamped by the terminal.
[0116] (Technical idea 9) The method for manufacturing a rotating electric machine according to technical idea 7, wherein the terminal has a projection (481) on at least one of the first clamping surface and the second clamping surface that protrudes toward the conductor, and in the temporary crimping step, the size of the bundled conductors in the clamping direction differs in at least a part within the range clamped by the terminal, and the smaller the size of the bundled conductors in the clamping direction, the greater the projection that protrudes, so that at least a part of all of the conductors is in contact with the terminal, thereby fixing the conductor unit to the pressurized energizing device.
[0117] (Technical idea 10) The method for manufacturing a rotating electric machine according to technical idea 6, wherein the terminal is provided with a connecting portion (587) that connects the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the size of the bundled conductors in the clamping direction increases as it moves away from the connecting portion, and the terminal is fixed to the pressurized energizing device in a state where the separation distance between the first clamping surface portion and the second clamping surface portion in the clamping direction increases as it moves away from the connecting portion.
[0118] (Technical idea 11) The method for manufacturing a rotating electric machine according to technical idea 6, wherein the terminal is provided with a connecting portion (687) that connects the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the size of the bundled conductors in the clamping direction decreases as it moves away from the connecting portion, and the terminal is fixed to the pressurized energizing device in a state where the separation distance between the first clamping surface portion and the second clamping surface portion in the clamping direction decreases as it moves away from the connecting portion.
[0119] (Technical Idea 12) A method for manufacturing a rotating electric machine according to any one of Technical Ideas 6 to 9, wherein the terminal is provided with a connecting portion (87) that connects the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the wire unit is fixed to the pressurized energizing device in a state where the size (Ws) from the wire closest to the connecting portion to the connecting portion is smaller than the size (Wd) of one wire.
[0120] (Technical Idea 13) The method for manufacturing a rotating electric machine according to any one of Technical Ideas 6 to 9, wherein the terminal comprises a connecting portion (87) that connects the first clamping surface portion and the second clamping surface portion, and a claw portion (88) provided on the opposite side of the connecting portion and projecting in a direction intersecting the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the claw portion has a chamfered portion (88m) at the end closest to the bundled conductors that is smaller than the width of one conductor.
[0121] (Technical Idea 14) The terminal comprises a connecting portion (87) that connects the first clamping surface portion and the second clamping surface portion, and a claw portion (88) provided on the opposite side of the connecting portion and protruding in a direction intersecting the first clamping surface portion and the second clamping surface portion, wherein in the temporary crimping step, the claw portion fixes the conductor unit to the pressurized current supply device with the angle (θa) with respect to the surface on which the claw portion is provided being obtuse. This is the method for manufacturing a rotating electric machine according to any one of Technical Ideas 6 to 9.
[0122] (Technical idea 15) A method for manufacturing a rotating electric machine according to technical idea 5, wherein in the pressurizing and energizing process, the bundled conductor is pressurized so that the strands in contact with the terminal are in a line.
Claims
1. A rotating electric machine comprising: a stator (20) having a coil section (21); a rotor (30) that rotates relative to the stator; and a conductor unit (90) for supplying current to the coil section, wherein the conductor unit comprises a bundled conductor (70, 270, 370, 470, 670) having a plurality of conductors (72, 372, 472, 672); and terminals (80, 480, 580, 680) bundling the bundled conductor, wherein the conductor comprises a strand section (73, 373, 473, 673) and a covering section (74, 374) covering the strand section, and all of the conductors are in a state in which at least a portion of the strand section exposed from the covering section is in contact with the terminal.
2. The rotating electric machine according to claim 1, wherein the terminal comprises a first clamping surface portion (85) and a second clamping surface portion (86) provided opposite to each other, and the plurality of wire portions are arranged in the clamping direction of the terminal, with a first wire portion (73a) in contact with the first clamping surface portion and a second wire portion (73b) in contact with the second clamping surface portion.
3. The rotating electric machine according to claim 2, wherein the terminal has a projection (481) on at least one of the first clamping surface and the second clamping surface that protrudes toward the wire portion.
4. The rotating electric machine according to claim 2, wherein the bundled conductor is a stranded wire (270) in which the conductors are twisted together.
5. A manufacturing method for a rotating electric machine (100) comprising a stator (20) having a coil section (21), a rotor (30) that rotates relative to the stator, and a conductor unit (90) for supplying current to the coil section, wherein the conductor unit comprises a bundled conductor (70, 270, 370, 470, 670) having a plurality of conductors (72, 372, 472, 672), and terminals (80, 480, 580, 680) bundling the bundled conductor, wherein the conductor comprises a strand section (73, 373, 473, 673) and a covering section (74, 374) covering the strand section, comprising: an attachment step (S101) of attaching the terminal to the bundled conductor; and a temporary crimping step (S102) of fixing the conductor unit to a pressurized current supply device (10), A method for manufacturing a rotating electric machine, comprising a pressurizing and energizing step (S103) in which the conductor unit is pressurized using the pressurizing and energizing device and energized, thereby partially removing the coating and bringing at least a portion of all the strands into contact with the terminal.
6. The method for manufacturing a rotating electric machine according to claim 5, wherein the terminal comprises a first clamping surface portion (85) and a second clamping surface portion (86) provided opposite to each other, and in the temporary crimping step, the wire unit is fixed to the pressurized energizing device such that a first wire (72a) in contact with the first clamping surface portion and a second wire (72b) in contact with the second clamping surface portion are aligned in the clamping direction of the terminal.
7. The method for manufacturing a rotating electric machine according to claim 6, wherein in the temporary crimping step, the wire unit is fixed to the pressurized energizing device with at least a portion of all of the wires in contact with the terminal.
8. The method for manufacturing a rotating electric machine according to claim 6 or claim 7, wherein in the temporary crimping step, the size of the first conductor in the clamping direction and the size of the second conductor in the clamping direction are the same, and the size of the bundled conductor in the clamping direction is the same throughout the entire range clamped by the terminal.
9. The method for manufacturing a rotating electric machine according to claim 7, wherein the terminal has a projection (481) on at least one of the first clamping surface and the second clamping surface that protrudes toward the conductor, and in the temporary crimping step, the size of the bundled conductors in the clamping direction differs in at least a portion of the area clamped by the terminal, and the smaller the size of the bundled conductors in the clamping direction, the greater the projection that protrudes, so that at least a portion of all of the conductors are in contact with the terminal, and the conductor unit is fixed to the pressurized energizing device.
10. The method for manufacturing a rotating electric machine according to claim 6, wherein the terminal includes a connecting portion (587) that connects the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the size of the bundled conductors in the clamping direction increases as it moves away from the connecting portion, and the terminal is fixed to the pressurized energizing device in a state where the distance between the first clamping surface portion and the second clamping surface portion in the clamping direction increases as it moves away from the connecting portion.
11. The method for manufacturing a rotating electric machine according to claim 6, wherein the terminal is provided with a connecting portion (687) that connects the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the size of the bundled conductors in the clamping direction decreases as it moves away from the connecting portion, and the terminal is fixed to the pressurized energizing device in a state where the distance between the first clamping surface portion and the second clamping surface portion in the clamping direction decreases as it moves away from the connecting portion.
12. The method for manufacturing a rotating electric machine according to claim 6, wherein the terminal includes a connecting portion (87) that connects the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the wire unit is fixed to the pressurized energizing device such that the distance (Ws) from the wire closest to the connecting portion to the connecting portion is smaller than the length (Wd) of one wire.
13. The method for manufacturing a rotating electric machine according to claim 6, wherein the terminal comprises a connecting portion (87) that connects the first clamping surface portion and the second clamping surface portion, and a claw portion (88) provided on the opposite side of the connecting portion and projecting in a direction intersecting the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the claw portion has a chamfered portion (88m) at the end closest to the bundled conductors that is smaller than the width of one of the conductors.
14. The method for manufacturing a rotating electric machine according to claim 6, wherein the terminal comprises a connecting portion (87) that connects the first clamping surface portion and the second clamping surface portion, and a claw portion (88) provided on the opposite side of the connecting portion and protruding in a direction intersecting the first clamping surface portion and the second clamping surface portion, and in the temporary crimping step, the claw portion fixes the conductor unit to the pressurized energizing device with the claw portion having an obtuse angle (θa) with respect to the surface on which the claw portion is provided.
15. The method for manufacturing a rotating electric machine according to claim 5, wherein in the pressurizing and energizing step, the assembled conductor is pressurized so that the strands in contact with the terminal are in a line.