Rotating electric machines

Abstract

To suppress a manufacturing man-hour and an increase in size in a radial direction.SOLUTION: A rotary electric machine includes: a rotor 20; a stator 30 arranged outside in a radial direction of the rotor; a control device 70 positioned on one side in a shaft direction of the stator; and a housing 11 for housing components. The stator includes: a stator core 31; an insulator having an insulator body unit 33 surrounding part of the stator core and a plurality of columnar units 34 to which the control device is fixed; and a coil 39 having a coil body unit 39a wound about the insulator body unit and a coil lead wire 39b led out from the coil body unit to one side in the shaft direction and connected to the control device. The plurality of columnar units include a first columnar unit having a columnar shape extending from an outer edge portion of the insulator body unit toward one side in the shaft direction and having a protruding portion 35b protruding radially inward. The protruding portion is located between the coil body unit and the control device in the shaft direction. The coil lead wire 39b bends toward the control device at the protruding portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rotating electric machine. [Background technology]

[0002] There is a known rotating electric machine in which a control device that controls the current supplied to a coil wound around a stator of the motor is arranged in the direction of the rotation axis of the rotor. There is also a known rotating electric machine in which the coil and the control device are connected. For example, Patent Document 1 describes an electric motor in which the ends of the windings are connected to protruding connection parts that protrude radially outward from the outer periphery of a circuit board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6106841 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric motor described above, the protruding connection portions connected to the winding ends protrude radially outward from the outer periphery of the circuit board, which increases the size of the circuit board in the radial direction. This results in a problem of an increased size of the electric motor in the radial direction. Furthermore, since the relatively flexible windings are difficult to position stably when attaching the winding ends to the circuit board, the process of connecting the winding ends to the protruding connection portions becomes complicated, which may increase the number of manufacturing steps for the electric motor. One aspect of the present invention aims to provide a rotating electric motor that simplifies the process of connecting the coil lead wires to a control device, thereby suppressing an increase in the number of manufacturing steps and suppressing an increase in the size of the electric motor in the radial direction. [Means for solving the problem]

[0005] One aspect of the rotating electric machine of the present invention includes a rotor rotatable about a central axis, a stator disposed radially outward of the rotor and facing the rotor across a radial gap, a control device located on one axial side of the stator, and a housing accommodating the rotor, the stator, and the control device. The stator includes a stator core fixed to the housing, an insulator having an insulator body surrounding at least a portion of the stator core and a plurality of columnar portions to which the control device is fixed, and a coil having a coil body wound around the insulator body and a coil lead wire drawn from the coil body to one axial side and connected to the control device. Each of the columnar portions is columnar, extending axially from an outer edge of the insulator body to one axial side and spaced apart along the circumferential direction. The columnar portions include a first columnar portion having a protrusion protruding radially inward. The protrusion is located axially between the coil body and the control device. The coil lead wire is bent at the protrusion toward the control device. [Effects of the Invention]

[0006] According to one aspect of the present invention, by simplifying the work of connecting a coil lead wire to a control device in a rotating electric machine, it is possible to prevent an increase in manufacturing labor and prevent the machine from becoming larger in the radial direction. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing a rotating electric machine according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing a part of the rotating electric machine according to the embodiment. [Figure 3] FIG. 3 is a perspective view showing another portion of the rotating electric machine according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing a part of a rotating electric machine according to an embodiment. [Figure 5] FIG. 5 is a perspective view showing a stator core according to one embodiment. [Figure 6] FIG. 6 is a perspective view showing an insulator according to an embodiment. [Figure 7] FIG. 7 is a top view showing a stator according to an embodiment. [Figure 8] FIG. 8 is a flow chart illustrating the installation process of one embodiment. [Figure 9] FIG. 9 is a first cross-sectional view showing an assembly procedure of a rotating electric potential sensor according to one embodiment. [Figure 10] FIG. 10 is a second cross-sectional view showing the assembly procedure of the rotating electric potential of one embodiment. [Figure 11] FIG. 11 is a third cross-sectional view showing the assembly procedure of the rotating electric potential of one embodiment. [Figure 12] FIG. 12 is a fourth cross-sectional view showing the assembly procedure of the rotating electric potential of one embodiment. [Figure 13] FIG. 13 is a fifth cross-sectional view showing the assembly procedure of the rotating electric potential of one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, a rotating electric machine according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments, and can be modified as desired within the scope of the technical concept of the present invention. In addition, in the following drawings, the scale and number of each structure may differ from the actual structure in order to make each configuration easier to understand.

[0009] In the following description, the Z axis is indicated in the figures where appropriate. The Z axis indicates the direction in which the central axis J of the rotating electric machine 1 of the embodiment described below extends. The central axis J shown in each figure is a virtual axis line. In the following description, the direction in which the central axis J extends, i.e., the direction parallel to the Z axis, is referred to as the "axial direction." The radial direction centered on the central axis J is simply referred to as the "radial direction." The circumferential direction centered on the central axis J is simply referred to as the "circumferential direction." The side in the axial direction toward which the arrow of the Z axis points (+Z side) is referred to as the "one axial side" or "upper side." The side in the axial direction opposite to the side toward which the arrow of the Z axis points (-Z side) is referred to as the "other axial side" or "lower side." Note that the terms "upper side" and "lower side" are simply names used to describe the relative positional relationships of the various parts, and the actual positional relationships may be other than those indicated by these names.

[0010] The circumferential direction is indicated by the arrow θ in each drawing. The side of the circumferential direction toward which the arrow θ points (+θ side) is called the "one circumferential side." The opposite side of the circumferential direction to the side toward which the arrow θ points (-θ side) is called the "other circumferential side." The one circumferential side is the side that moves counterclockwise around the central axis J when viewed from above. The other circumferential side is the side that moves clockwise around the central axis J when viewed from above.

[0011] The rotating electric machine 1 of this embodiment shown in FIG. 1 is a motor attached to equipment mounted on a vehicle. The equipment to which the rotating electric machine 1 is attached may be an automatic transmission or a drive unit that drives the axles of the vehicle. The rotating electric machine 1 of this embodiment is an inner rotor type three-phase brushless DC motor. The rotating electric machine 1 includes a housing 11, a rotor 20, a stator 30, and a control device 70.

[0012] The housing 11 accommodates the rotor 20, the stator 30, and the control device 70. In this embodiment, the housing 11 is made of metal. The housing 11 is electrically conductive. The housing 11 includes a housing member 12 and a cover member 13.

[0013] The housing member 12 accommodates the rotor 20, the stator 30, and the control device 70. The housing member 12 is cylindrical and extends axially about a central axis J. An opening 12d that opens upward is provided at the upper end of the housing member 12. The housing member 12 has a peripheral wall portion 12a, a bottom wall portion 12b, and a second bearing holder portion 12c.

[0014] The peripheral wall portion 12a has a cylindrical shape extending in the axial direction around the central axis J. The peripheral wall portion 12a surrounds the rotor 20, the stator 30, and the control device 70 from the radially outer side. The upper end of the peripheral wall portion 12a is the upper end of the housing member 12. The stator 30 is fixed to the inner peripheral surface of the peripheral wall portion 12a. An opening 12d is provided at the upper end of the peripheral wall portion 12a. An upward-facing stepped surface 12f is provided on the inner peripheral surface of the peripheral wall portion 12a.

[0015] The bottom wall portion 12b is in the shape of an annular plate centered on the central axis J. The plate surface of the bottom wall portion 12b faces the axial direction. The radially outer end of the bottom wall portion 12b is connected to the lower end of the peripheral wall portion 12a. The bottom wall portion 12b is provided with a hole portion 12e that penetrates in the axial direction. The hole portion 12e is a circular hole centered on the central axis J. The second bearing retaining portion 12c protrudes upward from the bottom wall portion 12b and is in the shape of an annular ring centered on the central axis J.

[0016] Lid member 13 is fixed to the upper end of housing member 12. Lid member 13 closes opening 12d from above. Lid member 13 has a lid main body portion 13a and a first bearing holder portion 13b.

[0017] The lid main body 13a is disk-shaped and centered on the central axis J. The plate surface of the lid main body 13a faces the axial direction. The outer edge of the lid main body 13a is fixed to the upper end of the housing member 12. This fixes the lid member 13 to the housing member 12. The first bearing holder 13b protrudes downward from the lid main body 13a and is annular and centered on the central axis J.

[0018] The rotor 20 is rotatable about a central axis J. The rotor 20 includes a rotor core 21, a shaft 22, a plurality of magnets (not shown), a first bearing 91, and a second bearing 92.

[0019] The rotor core 21 has a cylindrical shape that extends in the axial direction around the central axis J. A shaft 22 passes through the interior of the rotor core 21 in the axial direction. The inner circumferential surface of the rotor core 21 is fixed to the outer circumferential surface of the shaft 22. In other words, the rotor core 21 and the shaft 22 are fixed to each other. A plurality of magnets (not shown) are fixed to the rotor core 21. In this embodiment, each of the plurality of magnets is a permanent magnet. The plurality of magnets are arranged at intervals along the circumferential direction.

[0020] The shaft 22 has a cylindrical shape and extends in the axial direction about the central axis J. An upper portion of the shaft 22 extends above the rotor core 21 and is supported by a first bearing 91. A lower portion of the shaft 22 extends below the rotor core 21 and protrudes to the outside of the housing 11 through the hole 12e. The lower portion of the shaft 22 is supported by a second bearing 92.

[0021] As shown in FIG. 1, the first bearing 91 rotatably supports a portion of the shaft 22 that is above the rotor core 21. The first bearing 91 is held by the first bearing holder 13b. The second bearing 92 rotatably supports a portion of the shaft 22 that is below the rotor core 21. The second bearing 92 is held by the second bearing holder 12c. This allows the rotor 20 to rotate around the central axis J. In this embodiment, the first bearing 91 and the second bearing 92 are ball bearings. The first bearing 91 and the second bearing 92 may also be plain bearings.

[0022] As shown in FIG. 1, the stator 30 is disposed radially outside the rotor 20. The stator 30 faces the rotor 20 with a radial gap between them. The stator 30 has a stator core 31, an insulator 32, and three coils 39. The stator 30 generates a magnetic field when current flows through each of the three coils 39. A rotational torque is generated in the rotor 20 by the magnetic force between the magnetic poles of the magnetic field generated in the stator 30 and multiple magnets of the rotor 20 (not shown).

[0023] As shown in FIG. 1, the stator core 31 has a cylindrical shape extending in the axial direction around the central axis J. The stator core 31 surrounds the rotor core 21 from the radial outside. The outer peripheral surface of the stator core 31 is fixed to the inner peripheral surface of the peripheral wall portion 12a. In other words, the stator core 31 is fixed to the housing 11. The radially outer portion of the downward-facing surface of the stator core 31 is in axial contact with the stepped surface 12f of the housing member 12. This determines the position of the stator 30 relative to the housing 11 in the axial direction. As shown in FIG. 5, the stator core 31 has a core back portion 31a and teeth portions 31b.

[0024] The core back portion 31a has a cylindrical shape extending in the axial direction around the central axis J. As shown in FIG. 1, the outer peripheral surface of the core back portion 31a is fixed to the inner peripheral surface of the peripheral wall portion 12a. As shown in FIG. 5, the core back portion 31a has a first inner surface 31c. The first inner surface 31c is a surface facing radially inward of the core back portion 31a. When viewed in the axial direction, the first inner surface 31c is an arc-shaped surface. The multiple first inner surfaces 31c are arranged at equal intervals along the circumferential direction. In this embodiment, twelve first inner surfaces 31c are provided.

[0025] The teeth 31b protrude radially inward from the core back portion 31a. As shown in Fig. 1, the radially inward surface of each tooth 31b faces the outer peripheral surface of the rotor core 21 at a radial interval. As shown in Fig. 5, a plurality of teeth 31b are arranged at equal intervals along the circumferential direction. In this embodiment, twelve teeth 31b are provided.

[0026] The insulator 32 surrounds at least a portion of the stator core 31 and insulates the stator core 31 from the coil 39. As shown in FIG. 1 , the insulator 32 is disposed between the coil 39 and the housing 11 in the radial direction and insulates the coil 39 from the housing 11. In this embodiment, the insulator 32 is made of resin. The insulator 32 has insulating properties. In this embodiment, the insulator 32 is formed by injection molding. The insulator 32 has an insulator main body 33 and a plurality of columnar portions 34.

[0027] The insulator body 33 surrounds at least a portion of the stator core 31. As shown in FIG. 6, the insulator body 33 is the lower portion of the insulator 32. The insulator body 33 has an annular portion 33a, an inner wall portion 33b, and an accommodating portion 33c. The annular portion 33a has an annular shape centered on the central axis J. As shown in FIG. 1, the annular portion 33a is located above the core back portion 31a of the stator core 31. The radially outer end of the annular portion 33a is the radially outer end of the insulator body 33. In other words, the annular portion 33a is the outer edge of the insulator body 33.

[0028] As shown in FIG. 6, the inner wall portion 33b has a plate shape extending downward from the annular portion 33a. The plate surface of the inner wall portion 33b faces in the radial direction. When viewed in the axial direction, the inner wall portion 33b has an arc shape. The radially inward surface of the inner wall portion 33b and the inner circumferential surface of the annular portion 33a are connected in the axial direction. A plurality of the inner wall portions 33b are arranged at equal intervals along the circumferential direction. In this embodiment, twelve inner wall portions 33b are provided. Each inner wall portion 33b is arranged radially inward of the first inner surface 31c of the stator core 31 shown in FIG. 5. This insulates the coil 39 from the core back portion 31a.

[0029] As shown in FIG. 6, the accommodation portion 33c has a hollow, generally rectangular parallelepiped shape that protrudes radially inward from the inner wall portion 33b. As shown in FIG. 7, the accommodation portion 33c has a generally rectangular shape when viewed in the axial direction. A plurality of accommodation portions 33c are arranged at equal intervals along the circumferential direction. In this embodiment, twelve accommodation portions 33c are provided. In the circumferential direction, each accommodation portion 33c is arranged between adjacent inner wall portions 33b. The radially outer end of each accommodation portion 33c is connected to the inner wall portion 33b. As shown in FIG. 4, each accommodation portion 33c surrounds at least a portion of the tooth portion 31b. This insulates the coil 39 from the tooth portion 31b. Furthermore, as described above, the first inner surface 31c insulates the coil 39 from the core back portion 31a. Therefore, the insulator body 33 insulates the coil 39 from the stator core 31.

[0030] As shown in FIG. 1, the plurality of columnar portions 34 hold the control device 70. As shown in FIG. 6, each of the plurality of columnar portions 34 has a columnar shape extending upward from the annular portion 33a, i.e., toward one axial direction. That is, each of the plurality of columnar portions 34 extends upward from the outer edge of the insulator body portion 33. As shown in FIG. 7, the plurality of columnar portions 34 are arranged at equal intervals along the circumferential direction. In this embodiment, twelve columnar portions 34 are provided. As shown in FIG. 6, the radially inward surface of each columnar portion 34 is axially connected to the radially inward surface of the inner wall portion 33b. Also, as shown in FIG. 7, each columnar portion 34 is arranged between adjacent accommodation portions 33c (i.e., slots) in the circumferential direction. The plurality of columnar portions 34 includes a first columnar portion 35, a second columnar portion 36, and a third columnar portion 37.

[0031] As shown in Fig. 6, the first columnar portion 35 is a plate-like portion extending upward from the annular portion 33a. In this embodiment, three first columnar portions 35 are provided. As shown in Figs. 3 and 4, the first columnar portions 35 are arranged adjacent to each other on one circumferential side of the accommodation portion 33c around which the coil main body 39a, from which the coil lead wire 39b (described later) is drawn out, is wound.

[0032] 6, each first columnar section 35 has a first substrate support surface 35a and a protrusion 35b. The first substrate support surface 35a is the outer surface of the first columnar section 35 that faces upward, i.e., toward one axial side.

[0033] The protrusion 35b has a rectangular parallelepiped shape that protrudes radially inward. As shown in Fig. 1, the protrusion 35b is located axially between the coil main body 39a and the control device 70, which will be described later. In the axial direction, the protrusion 35b is located below the control device 70, i.e., on the other axial side. As shown in Figs. 6 and 7, the protrusion 35b is provided above the space between the accommodating portions 33c adjacent to each other in the circumferential direction (i.e., the slots).

[0034] As shown in FIG. 7 , the radially inner end of the protrusion 35b is located radially outward of the radially inner end of a claw 37a (described later). Therefore, according to this embodiment, when winding the coil 39 around the accommodation portion 33c of the insulator 32, interference between the protrusion 35b and a coil winding machine and a winding nozzle (not shown) can be suitably prevented. This improves the ease of assembly of the stator 30, thereby preventing an increase in the number of steps required to manufacture the stator 30. This also prevents an increase in the number of steps required to manufacture the rotating electric machine 1. Furthermore, according to this embodiment, because the protrusion 35b protrudes radially inward from the first columnar portion 35, an increase in the radial size of the stator 30 can be prevented. This prevents an increase in the radial size of the rotating electric machine 1.

[0035] As shown in FIG. 6, the second columnar portion 36 has a plate shape extending upward from the annular portion 33a. As shown in FIG. 1, the upper end of the second columnar portion 36 is located lower than the upper end of the first columnar portion 35 in the axial direction. As shown in FIG. 7, a plurality of second columnar portions 36 are provided at intervals along the circumferential direction. In this embodiment, five second columnar portions 36 are provided. As shown in FIG. 6, each second columnar portion 36 has a second substrate support surface 36a. The second substrate support surface 36a is the surface of the outer surface of the second columnar portion 36 that faces upward.

[0036] The third columnar portion 37 has a plate shape extending upward from the annular portion 33a. As shown in FIG. 1, in the axial direction, the upper end of the third columnar portion 37 is located below the upper end of the first columnar portion 35 and above the upper end of the second columnar portion 36. As shown in FIG. 7, a plurality of third columnar portions 37 are provided at equal intervals along the circumferential direction. In this embodiment, four third columnar portions 37 are provided. As shown in FIG. 6, each third columnar portion 37 has a claw portion 37a.

[0037] The claw portion 37a is located at the upper end of the third columnar portion 37 and protrudes radially inward. The claw portion 37a has a third substrate support surface 37b and a first inclined surface 37c. The third substrate support surface 37b is the surface of the outer surface of the claw portion 37a that faces downward, i.e., the other axial direction. As shown in FIG. 4, the third substrate support surface 37b is located above the second substrate support surface 36a. As shown in FIG. 6, the first inclined surface 37c is the surface of the outer surface of the claw portion 37a that is provided on the upper side of the claw portion 37a. The first inclined surface 37c is an inclined surface that is located downward as it extends radially inward.

[0038] As shown in FIGS. 6 and 7 , the claws 37a are provided above the spaces between the circumferentially adjacent housing portions 33c (i.e., slots). As described above, the protrusions 35b are provided above the spaces between the circumferentially adjacent housing portions 33c (i.e., slots). That is, the protrusions 35b and the claws 37a are positioned so as not to overlap the housing portions 33c when viewed in the axial direction. Therefore, a mold structure that is axially divided into two parts and has parting lines at the protrusions 35b and the claws 37a can be used for the mold of the insulator 32. According to this embodiment, the structure of the mold used for injection molding the insulator 32 can be prevented from becoming complicated. Furthermore, the shape of the mold can be simplified. Therefore, the number of steps and the cost of manufacturing the insulator 32 can be prevented from increasing. Therefore, the number of steps and the cost of manufacturing the rotating electric machine 1 can be prevented from increasing.

[0039] 1, the three coils 39 are each wound around the housing portion 33c of the insulator 32. Each coil 39 is electrically connected to the control device 70. As described above, a current is supplied to each of the three coils 39 from the control device 70. Each coil 39 has a coil main body 39a and a coil lead wire 39b.

[0040] The coil main body 39a is a portion of the coil 39 that is wound around the housing portion 33c of the insulator 32. In other words, the coil main body 39a is wound around the insulator main body 33. The coil lead wire 39b is a portion of the coil 39 that is drawn upward from the coil main body 39a, i.e., toward one axial direction. In this embodiment, each of the three coils 39 has one coil lead wire 39b. Thus, as shown in FIG. 2, three coil lead wires 39b are provided in this embodiment. As shown in FIG. 1, one end of each coil lead wire 39b is connected to the coil main body 39a. The other end of each coil lead wire 39b is connected to the control device 70. This electrically connects the control device 70 and the coil 39. The routing of the coil lead wires 39b between the coil main body 39a and the control device 70 will be described later.

[0041] The control device 70 is electrically connected to an external power source (not shown) and controls the current supplied to each of the three coils 39. The control device 70 is also electrically connected to an external device (not shown) and outputs operation information of the rotating electric machine 1, such as the rotation direction and rotation speed of the rotor 20, to the external device. As shown in FIG. 1 , the control device 70 is accommodated inside the housing 11. The control device 70 is located above the stator 30, i.e., on one axial side. The control device 70 has a first circuit board 71, a second circuit board 72, and a plurality of electronic components 75.

[0042] As shown in FIG. 1, the first circuit board 71 has an annular plate shape centered on the central axis J. The first circuit board 71 is disposed along a plane perpendicular to the central axis J. The plate surface of the first circuit board 71 faces the axial direction. The radially outer end of the first circuit board 71 is located radially outward of the columnar portion 34. The shaft 22 passes through the inside of the first circuit board 71 in the axial direction. As shown in FIG. 4, the lower side of the first circuit board 71, i.e., the surface facing the other axial side, is in contact with the first board support surface 35a of the first columnar portion 35. This determines the position of the first circuit board 71 in the axial direction.

[0043] Therefore, according to this embodiment, there is no need to use a separate member that is used only to determine the axial position of the first circuit board 71. This makes it possible to prevent an increase in the number of parts and manufacturing steps of the rotating electric machine 1. This also makes it possible to prevent an increase in the manufacturing cost of the rotating electric machine 1. A plurality of electronic components 75 are attached to the first circuit board 71. As shown in FIG. 2, the first circuit board 71 has a first cutout hole 71b.

[0044] The first cutout holes 71b are holes that penetrate the first circuit board 71 in the axial direction and extend radially inward from the outer edge of the first circuit board 71. In this embodiment, three first cutout holes 71b are provided. Each first cutout hole 71b has a first connection hole portion 71c and a first guide hole portion 71d.

[0045] When viewed in the axial direction, the first connection hole 71c has a circular shape. The other end of the coil lead wire 39b passes through the first connection hole 71c in the axial direction. The first connection hole 71c and the coil lead wire 39b are fixed by solder. That is, the first cutout hole 71b is connected to the coil lead wire 39b. This connects the control device 70 to the coil lead wire 39b. According to this embodiment, the control device 70 and the coil lead wire 39b are directly connected without using an intermediate member such as a bus bar. This prevents an increase in the number of parts and manufacturing steps of the rotating electric machine 1. This prevents an increase in the manufacturing cost of the rotating electric machine 1.

[0046] The first guide hole 71d is a hole that connects the outer edge of the first circuit board 71 and the first connection hole 71c. The first guide hole 71d extends at an angle toward one circumferential side from the outer edge of the first circuit board 71 toward the first connection hole 71c. In this embodiment, the first guide hole 71d extends with a uniform width from the outer edge of the first circuit board 71 toward the first connection hole 71c. The lower end of the first connection hole 71c is in contact with the first board support surface 35a of the first columnar section 35. That is, when viewed in the axial direction, a portion of the first board support surface 35a overlaps with the first cutout hole 71b.

[0047] As shown in FIG. 1 , the second circuit board 72 has a substantially annular plate shape centered on the central axis J. The second circuit board 72 is disposed along a plane perpendicular to the central axis J. The plate surface of the second circuit board 72 faces the axial direction. The second circuit board 72 is located above the stator 30. The second circuit board 72 is located below the first circuit board 71, i.e., on the other axial side. Therefore, according to the present embodiment, the first circuit board 71 and the second circuit board 72 are disposed side by side in the axial direction, which prevents the circuit boards from becoming larger in the radial direction compared to when only one circuit board is provided. This prevents the rotating electric machine 1 from becoming larger in the radial direction.

[0048] The shaft 22 passes through the second circuit board 72 in the axial direction. The radially outer end of the second circuit board 72 is located radially outward of the columnar portion 34. As shown in FIG. 3, recesses 72e recessed radially inward are provided at the outer edge of the second circuit board 72. Although not shown, seven recesses 72e are provided in this embodiment. One of the first columnar portion 35 or the third columnar portion 37 passes through each recess 72e in the axial direction. As shown in FIG. 4, the lower side of the second circuit board 72, i.e., the surface facing the other axial side, is in contact with the second board support surface 36a of the second columnar portion 36. Furthermore, the upper side of the second circuit board 72, i.e., the surface facing one axial side, is in contact with the third board support surface 37b of the third columnar portion 37. These elements determine the axial position of the second circuit board 72. 3, the radially outward facing surface of each recess 72e is in contact with the radially outward facing surface of either the first columnar section 35 or the third columnar section 37. This determines the radial position of the second circuit board 72. Therefore, the second circuit board 72 is held by the multiple columnar sections 34.

[0049] That is, according to the present embodiment, the second circuit board 72 can be held by the multiple columnar portions 34 of the insulator 32. Therefore, there is no need to use a separate member such as a screw to fix the second circuit board 72 to the insulator 32, the housing 11, or the like. This makes it possible to prevent an increase in the number of parts and manufacturing steps of the rotating electric machine 1. Therefore, it is possible to prevent an increase in the manufacturing cost of the rotating electric machine 1.

[0050] As shown in FIG. 3 , multiple electronic components 75 are attached to the second circuit board 72. The second circuit board 72 has second cutout holes 72b. When viewed in the axial direction, the configuration of the second cutout holes 72b is the same as the configuration of the first cutout holes 71b. Therefore, in the following description, description of the same configuration as the first cutout holes 71b may be omitted. The configuration of the second cutout holes 72b may be different from the configuration of the first cutout holes 71b. The second cutout holes 72b are holes that penetrate the second circuit board 72 in the axial direction and extend radially inward from the outer edge of the second circuit board 72. The second cutout holes 72b are disposed radially inward of the first columnar portion 35. When viewed radially, the second cutout holes 72b overlap with the first columnar portion 35. In this embodiment, three second cutout holes 72b are provided. Each second cutout hole 72b has a second connection hole portion 72c and a second guide hole portion 72d.

[0051] The coil lead wire 39b is passed through the second connection hole 72c in the axial direction. That is, the second circuit board 72 has a second cutout hole 72b through which the coil lead wire 39b is passed. The second guide hole 72d is a hole that connects the outer edge of the second circuit board 72 and the second connection hole 72c. The second guide hole 72d extends at an angle toward one circumferential side from the outer edge of the second circuit board 72 toward the second connection hole 72c.

[0052] As described above, the plurality of electronic components 75 are attached to the first circuit board 71 and the second circuit board 72. The plurality of electronic components 75 are fixed to the first circuit board 71 and the second circuit board 72 by soldering or the like, and are electrically connected to the first circuit board 71 and the second circuit board 72. In this embodiment, the plurality of electronic components 75 are electronic components such as capacitors, transistors, and connectors. The plurality of electronic components 75 include an electronic component 75a fixed to both the first circuit board 71 and the second circuit board 72. Therefore, the first circuit board 71 and the second circuit board 72 are fixed to each other via the electronic component 75a. In this embodiment, the electronic component 75a is an inter-board connector that electrically connects the first circuit board 71 and the second circuit board 72. In this embodiment, three electronic components 75a are provided. The electronic components 75a may be partially embedded in resin by insert molding using the electronic component 75a as an insert member. In this case, the strength of electronic component 75a containing resin can be increased, and first circuit board 71 and second circuit board 72 can be firmly fixed together.

[0053] Therefore, in this embodiment, the first circuit board 71 and the second circuit board 72 are fixed together via the electronic components 75. Furthermore, as described above, the second circuit board 72 is held by the multiple columnar portions 34. That is, the first circuit board 71 can be held by the multiple columnar portions 34 via the second circuit board 72 and the electronic components 75a. Therefore, there is no need to use a separate member, such as a screw, to fix the first circuit board 71 to the insulator 32, the housing 11, or the like. This makes it possible to prevent an increase in the number of parts and manufacturing steps of the rotating electric machine 1. This makes it possible to prevent an increase in the manufacturing cost of the rotating electric machine 1.

[0054] Next, the routing of the coil lead wires 39b will be described. Fig. 4 shows the routing of two of the three coil lead wires 39b. The routing of the remaining coil lead wire 39b is similar to the routing of the two coil lead wires 39b, and therefore will not be described here.

[0055] As described above, the columnar portions 34 arranged adjacent to each other on one circumferential side of the accommodation portion 33c around which the coil main body 39a, from which the coil lead wire 39b is drawn, is the first columnar portion 35. In the axial direction, the portion of the coil lead wire 39b located between the coil main body 39a and the protrusion 35b extends upward and toward one circumferential side (+θ side) to contact the downward-facing surface of the protrusion 35b and extend toward one circumferential side along the downward-facing surface of the protrusion 35b. The coil lead wire 39b located on one circumferential side of the protrusion 35b extends substantially upward along the surface of the protrusion 35b facing toward one circumferential side. In other words, the coil lead wire 39b is bent at the protrusion 35b toward the control device 70.

[0056] As will be described later, in a first step S01 of an attachment process Pf in the manufacturing process of the rotating electric machine 1, the coil lead wire 39b is hooked onto the protrusion 35b and pulled upward by an operator or the like, so that the coil lead wire 39b is wound around the protrusion 35b. This reduces variations in the circumferential and radial positions of the coil lead wire 39b above the protrusion 35b. In addition, the portion of the coil lead wire 39b between the coil main body 39a and the protrusion 35b in the axial direction is positioned radially inward of the first columnar portion 35.

[0057] The coil lead wire 39b in the portion above the protrusion 35b extends substantially upward and is passed axially through the second cutout hole 72b of the second circuit board 72 and the first cutout hole 71b of the first circuit board 71. More specifically, the coil lead wire 39b is passed axially through the second connection hole 72c and the first connection hole 71c. Therefore, the coil lead wire 39b in the portion above the protrusion 35b is positioned radially inward of the first columnar portion 35. As described above, the coil lead wire 39b in the portion between the coil main body 39a and the protrusion 35b in the axial direction is positioned radially inward of the first columnar portion 35. In other words, the coil lead wire 39b overlaps the first columnar portion 35 when viewed radially. The other end of the coil lead wire 39b is fixed to the first connection hole 71c by soldering. This electrically connects the first circuit board 71 and the coil 39. That is, the control device 70 and the coil 39 are electrically connected.

[0058] Next, an attachment process Pf will be described, which is one of the manufacturing processes for the rotating electric machine 1 of this embodiment. The attachment process Pf includes attaching the control device 70 to the stator 30 and attaching the stator 30 with the attached control device 70 to the housing 11. As shown in Fig. 8 , the attachment process Pf of this embodiment includes a first step S01 of hooking the coil lead wire 39b onto the protrusion 35b and bending it upward, a second step S02 of passing the coil lead wire 39b through the second cutout hole 72b of the second circuit board 72, a third step S03 of passing the coil lead wire 39b through the first cutout hole 71b of the first circuit board 71, a fourth step S04 of holding the control device 70 on the insulator 32, a fifth step S05 of connecting the other end of the coil lead wire 39b to the first circuit board 71, and a sixth step S06 of attaching the stator 30 with the attached control device 70 to the housing 11. In the following description, "workers, etc." includes workers who perform each task and assembly equipment, etc. Each task may be performed by a worker alone, by an assembly equipment alone, or by both a worker and an assembly equipment.

[0059] In a first step S01, the worker or the like bends the coil lead wire 39b upward while hooking it onto the protrusion 35b. As shown in FIG. 9 , the worker or the like pulls the coil lead wire 39b (indicated by a two-dot chain line) drawn upward from the coil main body 39a toward one circumferential side (+θ side) and passes it under the protrusion 35b toward one circumferential side (+θ side). The worker or the like then hooks the coil lead wire 39b onto the downward-facing surface of the protrusion 35b and pulls it upward. At this time, a portion of the coil lead wire 39b contacts the downward-facing surface of the protrusion 35b, and another portion of the coil lead wire 39b contacts the surface of the protrusion 35b facing one circumferential side (+θ side). As a result, the portion of the coil lead wire 39b above the protrusion 35b extends upward, i.e., toward the control device 70. Furthermore, as described above, the coil lead wire 39b is wound around the protrusion 35b and extends upward, so that the circumferential and radial positions of the coil lead wire 39b above the protrusion 35b are stabilized.

[0060] In a second step S02, the worker passes the coil lead wire 39b through the second cutout hole 72b of the second circuit board 72. After the first step S01 is completed, the worker moves the control device 70 from the upper side to the lower side of the stator 30, as shown in Fig. 9. At this time, a plurality of electronic components 75 have already been attached to the first circuit board 71 and the second circuit board 72 of the control device 70, and the first circuit board 71 and the second circuit board 72 are fixed to each other via the electronic component 75a.

[0061] As shown in FIG. 10 , the worker moves the control device 70 until the second circuit board 72 is positioned above the upper end of the first columnar portion 35 and below the other end of the coil lead wire 39b. The worker then grasps the portion of the coil lead wire 39b above the first columnar portion 35 and passes the coil lead wire 39b through the second cutout hole 72b from the radially outer side of the second circuit board 72. More specifically, the worker inserts the coil lead wire 39b into the second guide hole 72d from the radially outer end of the second guide hole 72d shown in FIG. 3 and moves the coil lead wire 39b along the second guide hole 72d to the second connection hole 72c. This causes the coil lead wire 39b to pass axially through the second connection hole 72c. That is, the coil lead wire 39b passes axially through the second cutout hole 72b.

[0062] According to this embodiment, as described above, the second circuit board 72 has the second cutout holes 72b extending radially inward from the outer edge of the second circuit board 72. This allows the coil lead wires 39b to be inserted into the second cutout holes 72b from the radially outer side of the second circuit board 72. If the second cutout holes 72b were not connected to the outer edge of the second circuit board 72, the coil lead wires 39b would need to be passed through the second cutout holes from below. In this case, it would be difficult for an operator to confirm the relative positions of the coil lead wires 39b and the second cutout holes 72b in the radial and circumferential directions, making it difficult to pass the coil lead wires 39b through the second cutout holes. On the other hand, in this embodiment, the operator can confirm the radially outer position of the second cutout holes 72b, making it easy to insert the coil lead wires 39b into the second cutout holes 72b. This simplifies the work of the second step S02. This simplifies the process of connecting the coil lead wires 39b to the control device 70. This prevents the number of manufacturing steps for the rotary electric machine 1 from increasing.

[0063] Furthermore, according to this embodiment, since the second guide hole portions 72d extend at an angle toward one circumferential side (+θ side) as they extend radially inward from the outer edge of the second circuit board 72, the coil lead wires 39b can be prevented from slipping out radially outward from the second cutout holes 72b. This can prevent an increase in the number of manufacturing steps for the rotating electric machine 1.

[0064] Furthermore, in this embodiment, the coil lead-out wire 39b extends upward, bypassing one circumferential side (+θ side) of the protrusion 35b, and because the coil lead-out wire 39b has a certain degree of rigidity, the coil lead-out wire 39b above the protrusion 35b tends to move toward one circumferential side. As described above, the second guide hole portion extends at an angle toward one circumferential side (+θ side) as it extends radially inward from the outer edge of the second circuit board 72. Therefore, when the coil lead-out wire 39b moves toward one circumferential side inside the second cutout hole 72b, the coil lead-out wire 39b moves along the second guide hole portion toward the second connection hole portion 72c. This more effectively prevents the coil lead-out wire 39b from slipping out radially outward from the second cutout hole 72b. This simplifies the process of connecting the coil lead-out wire 39b to the control device 70. Therefore, an increase in the number of manufacturing steps for the rotating electrical machine 1 can be more suitably suppressed.

[0065] Furthermore, as described above, according to this embodiment, in the first step S01, the coil lead-out wire 39b is hooked onto the protrusion 35b and pulled upward, which makes it easier to stabilize the radial and circumferential positions of the coil lead-out wire 39b located above the protrusion 35b. This allows a worker or the like to easily grasp the coil lead-out wire 39b and easily pass the coil lead-out wire 39b through the second cutout hole 72b. This simplifies the process of connecting the coil lead-out wire 39b to the control device 70. This more effectively prevents an increase in the number of steps required to manufacture the rotating electric machine 1.

[0066] In a third step S03, the worker passes the coil lead wire 39b through the first cutout hole 71b of the first circuit board 71. After completing the second step S02, the worker moves the control device 70 downward. As shown in FIG. 11 , the worker moves the control device 70 until the first circuit board 71 is positioned above the upper end of the first columnar portion 35 and below the other end of the coil lead wire 39b. Then, the worker grasps the portion of the coil lead wire 39b that is above the first columnar portion 35 and passes the coil lead wire 39b through the first cutout hole 71b from the radially outer side of the first circuit board 71. More specifically, the worker inserts the coil lead wire 39b into the first guide hole 71d from the radially outer end of the first guide hole 71d shown in FIG. 2 and moves the coil lead wire 39b along the first guide hole 71d to the first connection hole 71c. As a result, the coil lead wire 39b is passed through the first connection hole portion 71c in the axial direction. That is, the coil lead wire 39b is passed through the first cutout hole 71b in the axial direction.

[0067] According to this embodiment, as described above, the first circuit board 71 has the first cutout holes 71b extending radially inward from the outer edge of the first circuit board 71. This allows the coil lead wires 39b to be inserted into the first cutout holes 71b from the radially outer side of the first circuit board 71. This allows a worker or the like to confirm the radially outer position of the first cutout holes 71b and easily insert the coil lead wires 39b into the first cutout holes 71b. This simplifies the work of the third step S03. This simplifies the work of connecting the coil lead wires 39b to the control device 70. This prevents an increase in the number of steps required to manufacture the rotating electric machine 1.

[0068] Furthermore, according to this embodiment, since the first guide hole portions 71d extend at an angle toward one circumferential side (+θ side) as they extend radially inward from the outer edge of the first circuit board 71, the coil lead wires 39b can be prevented from slipping out radially outward from the first cutout holes 71b. This can prevent an increase in the number of manufacturing steps for the rotating electric machine 1.

[0069] Furthermore, in this embodiment, the coil lead wires 39b are passed axially through the second cutout holes 72b, so that the radial and circumferential positions of the coil lead wires 39b located above the second circuit board 72 are stabilized. This allows workers to easily grasp the coil lead wires 39b and pass them through the first cutout holes 71b. This simplifies the process of connecting the coil lead wires 39b to the control device 70. This more effectively prevents an increase in the number of steps required to manufacture the rotating electric machine 1.

[0070] In a fourth step S04, the control device 70 is fixed to the insulator 32. After the third step S03 is completed, the worker or the like moves the control device 70 downward. At this time, the downward-facing surface of the second circuit board 72 comes into contact with the first inclined surface 37c of the third columnar portion 37, so that a force acting radially outward is applied to the third columnar portion 37, causing the third columnar portion 37 to deform radially outward. This allows the control device 70 to be moved further downward.

[0071] When the worker or the like further moves the control device 70 downward, as shown in FIG. 12 , the downward-facing surface of the first circuit board 71 comes into contact with the first board support surface 35a of the first columnar section 35, and the downward-facing surface of the second circuit board 72 comes into contact with the second board support surface 36a of the second columnar section 36. At this time, the upward-facing surface of the second circuit board 72 and the third board support surface 37b of the third columnar section 36 are in the same position in the axial direction, so that the third columnar section 37 moves radially inward due to elastic force, and the upward-facing surface of the second circuit board 72 comes into contact with the third board support surface 37b of the third columnar section. As a result, the control device 70 is held by the insulator 32. That is, the control device 70 is held by the stator 30.

[0072] According to this embodiment, the protrusion 35b is located axially below the control device 70, i.e., on the other axial side. Therefore, in the second step S02 to the fourth step S04, when the control device 70 is held on the stator 30, interference between the control device 70 and the protrusion 35b can be suppressed. This makes it easy to hold the control device 70 on the stator 30. Therefore, an increase in the number of manufacturing steps for the rotating electric machine 1 can be more suitably suppressed.

[0073] Furthermore, according to this embodiment, a portion of the first board support surface 35a overlaps with the first cutout hole 71b when viewed in the axial direction. The first board support surface 35a also overlaps with the surface of the first circuit board 71 facing downward. Therefore, the first columnar portion 35 can effectively prevent the coil lead wires 39b from moving radially outward. This effectively prevents the coil lead wires 39b from slipping out radially outward through the first cutout hole 71b. This more effectively prevents an increase in the number of steps required to manufacture the rotating electric machine 1.

[0074] In a fifth step S05, the worker connects the other end of the coil lead wire 39b to the first circuit board 71. After completing the fourth step S04, the worker checks the position of the coil lead wire 39b inside the first cutout hole 71b. If the coil lead wire 39b is positioned in the first guide hole 71d, the worker moves the coil lead wire 39b radially inward and passes it through the first connection hole 71c. The worker then cuts the portion of the coil lead wire 39b above the first circuit board 71 to adjust the length of the coil lead wire 39b that protrudes upward from the first circuit board 71. Note that the length of the coil lead wire 39b that protrudes upward from the first circuit board 71 does not necessarily need to be adjusted. The worker then fixes the other end of the coil lead wire 39b to the first connection hole 71c by soldering. This electrically connects the coil 39 and the control device 70.

[0075] In a sixth step S06, an operator or the like attaches the stator 30 that holds the control device 70 to the housing 11. After the fifth step S05 is completed, as shown in FIG. 12, the stator 30 that holds the control device 70 is inserted into the housing member 12 through the opening 12d of the housing member 12 that is held by a jig or the like. As shown in FIG. 1, when the stator 30 is inserted until the outer edge of the downward-facing surface of the stator core 31 contacts the stepped surface 12f of the housing member 12, the axial position of the stator 30 relative to the housing member 12 is determined, and the stator 30 is fixed to the housing member 12. In other words, the stator 30 is attached to the housing 11.

[0076] According to this embodiment, the coil lead wires 39b are located radially inward of the first columnar portions 35, and overlap the first columnar portions 35 when viewed in the radial direction. Therefore, when inserting the stator 30 holding the control device 70 into the housing 11, contact between the housing 11 and the coil lead wires 39b can be prevented. This makes it possible to easily insert the stator 30 holding the control device 70 into the housing 11. This more effectively prevents an increase in the number of manufacturing steps for the rotating electric machine 1. Furthermore, this also prevents the coil lead wires 39b from being damaged due to contact with the housing 11. This effectively ensures insulation of the coil lead wires 39b.

[0077] According to this embodiment, the stator 30 includes a stator core 31 fixed to the housing 11, an insulator 32 having an insulator main body 33 surrounding at least a portion of the stator core 31 and a plurality of columnar portions 34 to which the control device 70 is fixed, and a coil 39 having a coil main body 39a wound around the insulator main body 33 and a coil lead wire 39b drawn out from the coil main body 39a to one axial side and connected to the control device 70, each of the plurality of columnar portions 34 being columnar extending from the outer edge of the insulator main body 33 to one axial side and arranged at intervals along the circumferential direction, and the plurality of columnar portions 34 includes a first columnar portion 35 having a protrusion 35b protruding radially inward, the protrusion 35b being located axially between the coil main body 39a and the control device 70, and the coil lead wire 39b being bent at the protrusion 35b toward the control device 70. This stabilizes the radial and circumferential positions of the coil lead wires 39b above the protrusions 35b. This simplifies the process of connecting the coil lead wires 39b to the control device 70 when attaching the control device 70 to the stator 30. This prevents an increase in the number of steps required to manufacture the rotating electric machine 1.

[0078] Furthermore, in this embodiment, as described above, the radial position of the coil lead-out wire 39b above the protrusion 35b is stable, so that a gap between the housing 11 and the coil lead-out wire 39b can be easily provided. This makes it easy to ensure insulation between the housing 11 and the coil lead-out wire 39b. This eliminates the need to ensure insulation between the coil lead-out wire 39b and the housing 11 by, for example, wrapping an insulator such as Nitoflon tape around the coil lead-out wire 39b. This reduces the number of manufacturing steps and the manufacturing cost of the rotating electric machine 1. Furthermore, because a gap between the housing 11 and the coil lead-out wire 39b can be easily provided, the diameter of the housing 11 can be reduced. This prevents the rotating electric machine 1 from becoming too large in the radial direction.

[0079] Furthermore, in this embodiment, as described above, by hooking the coil lead-out wire 39b onto the protrusion 35b and pulling it upward, the coil lead-out wire 39b is forced to face upward, thereby suppressing variations in the radial and circumferential positions of the coil lead-out wire 39b above the protrusion 35b, eliminating the need to provide additional members for regulating the radial and circumferential positions of the coil lead-out wire 39b. This prevents an increase in the number of parts and manufacturing costs of the rotating electric machine 1.

[0080] According to this embodiment, when viewed in the radial direction, the coil lead wire 39b overlaps the first columnar portion 35 and is located radially inward of the first columnar portion 35. In other words, the insulating first columnar portion 35 can be disposed radially between the coil lead wire 39b and the housing 11. This makes it possible to more appropriately ensure insulation between the housing 11 and the coil lead wire 39b.

[0081] The present invention is not limited to the above-described embodiment, and other configurations and methods may be adopted within the scope of the technical concept of the present invention. The protrusion may have any configuration as long as it can hook the coil lead wire. For example, the protrusion may be cylindrical and protrude radially inward, or may have a triangular prism shape, or the like. Furthermore, the protrusion may be a separate member fixed to the first columnar portion.

[0082] The plurality of columnar portions may have any configuration as long as they can hold the control device and are disposed radially between the coil lead wires and the housing. For example, the plurality of columnar portions may be separate members from the insulator body. Furthermore, the number of the plurality of columnar portions is not limited to 12, and may be 11 or less, or 13 or more.

[0083] The control device may have any configuration as long as it can supply current to the stator. For example, the number of circuit boards is not limited to two, and may be one, or three or more. Furthermore, the two circuit boards do not need to be fixed to each other by electronic components, but may be fixed to each other by other members. Furthermore, the two circuit boards do not need to be fixed to each other. The control device may be fixed to other members, such as a housing.

[0084] Although the embodiments of the present invention have been described above, the application of the rotating electric machine to which the present invention is applied is not particularly limited. The rotating electric machine is not limited to a motor, but may also be a generator. The configurations and combinations thereof in the embodiments of the present invention are merely examples, and additions, omissions, substitutions, and other modifications of the configurations are possible within the scope of the spirit of the present invention. [Explanation of symbols]

[0085] DESCRIPTION OF SYMBOLS 1... rotating electric machine, 11... housing, 20... rotor, 30... stator, 31... stator core, 31a... core back portion, 31b... teeth portion, 32... insulator, 33... insulator main body portion, 33c... accommodation portion, 34... columnar portion, 35... first columnar portion, 35a... first board support surface, 35b... protrusion portion, 36... second columnar portion, 36a... second board support surface, 37... third columnar portion, 37a... claw portion, 37b... third board support surface, 39... coil, 39a... coil main body portion, 39b... coil lead wire, 70... control device, 71... first circuit board, 71b... first cutout hole, 71c... first connection hole portion, 71d... first guide hole portion, 72... second circuit board, 72b... second cutout hole, J... central axis

Claims

1. a rotor rotatable about a central axis; a stator disposed radially outside the rotor and facing the rotor with a gap in the radial direction; a control device located on one axial side of the stator; a housing that accommodates the rotor, the stator, and the control device; Equipped with The stator includes: a stator core fixed to the housing; an insulator including an insulator body portion surrounding at least a portion of the stator core and a plurality of pillar portions to which the control device is fixed; a coil including a coil body portion wound around the insulator body portion and a coil lead wire drawn out from the coil body portion to one side in the axial direction and connected to the control device; and each of the plurality of columnar portions has a columnar shape extending from an outer edge portion of the insulator body portion toward one side in the axial direction and arranged at intervals along the circumferential direction; the plurality of columnar portions include a first columnar portion having a protrusion protruding radially inward, the protrusion is located between the coil body and the control device in the axial direction, The coil lead wire is bent at the protrusion toward the control device.

2. When viewed in the radial direction, the coil lead wire overlaps the first columnar portion, The rotating electric machine according to claim 1 , wherein the coil lead wire is located radially inward of the first columnar portion.

3. The stator core an annular core back portion extending in the axial direction; a plurality of teeth protruding radially inward from the core back portion and arranged at intervals along a circumferential direction; and the insulator body has a plurality of housing portions surrounding at least a portion of each of the teeth, The rotating electric machine according to claim 1 , wherein the protrusions are provided on one axial side between the accommodating portions adjacent to each other in the circumferential direction.

4. the control device has a first circuit board that is disposed along a plane perpendicular to the central axis and is connected to the coil lead wire; 4. The rotating electric machine according to claim 1, wherein the first circuit board has a first cutout hole that penetrates the first circuit board in the axial direction, extends radially inward from an outer edge of the first circuit board, and is connected to the coil lead wire.

5. the first cutout hole has a first guide hole portion extending with a uniform width from an outer edge of the first circuit board, and a first connection hole portion connected to the first guide hole portion and to which the coil lead wire is connected, The rotating electric machine according to claim 4 , wherein the first guide hole portion extends at an incline toward one circumferential side from an outer edge of the first circuit board toward the first connection hole portion.

6. 6. The rotating electric machine according to claim 4, wherein the control device has a second circuit board arranged along a plane perpendicular to the central axis and located on the other axial side of the first circuit board.

7. 7. The rotating electric machine according to claim 6, wherein the second circuit board has a second cutout hole that penetrates the second circuit board in the axial direction, extends inward from an outer edge of the second circuit board, and through which the coil lead wire is passed.

8. the plurality of columnar portions include a second columnar portion and a third columnar portion, the second columnar portion has a second board support surface facing one axial side, the second board support surface being in contact with a surface of the second circuit board facing the other axial side; The third columnar portion has a claw portion that protrudes radially inward, 8. The rotating electric machine according to claim 6, wherein the claw portion has a third board support surface facing the other axial side, and the third board support surface contacts a surface of the second circuit board facing the one axial side.

9. The rotating electric machine according to claim 8 , wherein a radially inner end of each of the protrusions is positioned radially outward of a radially inner end of each of the claws.

10. 10. The rotating electric machine according to claim 4, wherein the first columnar portion has a first board support surface facing one axial side, and the first board support surface contacts a surface of the first circuit board facing the other axial side.

11. The rotating electric machine according to claim 10 , wherein a portion of the first board support surface overlaps with the first cutout hole when viewed in the axial direction.

12. The rotating electric machine according to claim 1 , wherein the protrusion is located axially on the other side of the control device.

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