Rotor device

Abstract

To provide a rotor device in which a refrigerant flow can be prevented from being blocked.SOLUTION: A rotor device includes a motor unit 30, a capacitor unit 50 that is disposed on a Y-direction side with respect to the motor unit, a power module unit 40 that is disposed on an X-direction side with respect to the motor unit and the capacitor unit, module refrigerant flow paths 92a to 92e that mainly cool the power module unit, and opposed cooling paths 93 and 94 that mainly cool the capacitor unit. The module refrigerant flow paths include a module cooling path 92c, a supply hole 92b for supplying a refrigerant to the module cooling path, a discharge hole 92d for discharging the refrigerant from the module cooling path, and an outflow path 92e connecting the module cooling path and the opposed cooling paths. The outflow path, the opposed cooling paths, and the discharge hole are disposed on the capacitor unit side rather than on the motor unit side with respect to the center of the module cooling path in a Y direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a rotating body device. [Background technology]

[0002] An example of a rotating body device is a motor unit disclosed in Patent Document 1. The motor unit has a motor and an inverter unit installed on the top surface of the motor. The inverter unit has a control board, a power section including an inverter circuit, and a drive circuit such as a capacitor. The inverter unit also has a refrigerant flow path. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 40278 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a rotating body device, depending on the position of the refrigerant flow path, the refrigerant flow path may have a shape that is likely to obstruct the flow of the refrigerant. In terms of the above and other aspects not mentioned, further improvements are required in rotating body devices.

[0005] One disclosed object is to provide a rotating body device that can suppress obstruction of the flow of a refrigerant. [Means for solving the problem]

[0006] The rotating body device disclosed herein is a motor unit (30); a capacitor section (50) that is part of a drive circuit that drives the motor section to rotate, the capacitor section (50) being arranged radially of the motor section and smaller than the motor section; a power module section (40) that is part of the drive circuit and is arranged on the motor section's axial side relative to the motor section and the capacitor section; A module refrigerant passage (92a to 92e) through which a refrigerant flows is a part that mainly cools the power module part, a condenser refrigerant passage (93, 94) through which a refrigerant flows, the condenser refrigerant passage (93, 94) being a portion that mainly cools the condenser portion; The module refrigerant path is a module facing portion (92c) disposed facing the power module portion; Two holes (92b, 92d) for supplying and discharging a refrigerant to the module facing portion; a connecting passage (92e) connecting the module facing portion and the condenser refrigerant passage, The connecting passage, a portion of the condenser refrigerant passage, and the first hole, which is one of the two holes, are provided radially closer to the condenser section than to the motor section with respect to the center of the module opposing section.

[0007] In this way, the capacitor section of the rotating body device is smaller than the motor section, and therefore, in the rotating body device, the dead space in the opposing area of ​​the power module section is more likely to be larger on the capacitor section side than on the motor section side, based on the center of the module opposing section.

[0008] The connecting passage, a portion of the condenser refrigerant passage, and the first hole are located radially closer to the condenser section than to the motor section, i.e., in an area with a relatively large dead space. This prevents the connecting passage, a portion of the condenser refrigerant passage, and the first hole from being shaped in a way that obstructs the flow of refrigerant in the rotating body device.

[0009] The various aspects disclosed in this specification employ different technical means to achieve their respective objectives. The reference numerals in parentheses in the claims and in this section are intended to exemplify correspondences with the following embodiments and are not intended to limit the technical scope. The objectives, features, and advantages disclosed in this specification will become more apparent by reference to the following detailed description and the accompanying drawings. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a plan view showing a schematic configuration of a rotating body device. [Figure 2] FIG. 2 is a side view taken from the direction of arrow II in FIG. [Figure 3] FIG. 2 is a plan view showing a schematic configuration of the rotating body device with the upper cover removed. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV in FIG. 3. [Figure 6] 6 is a diagram showing a schematic configuration inside the housing as seen from the direction of arrow VI in FIG. 1. [Figure 7] FIG. 10 is a plan view of a rotating body device according to a first modified example. [Figure 8] FIG. 10 is a cross-sectional view of a rotating body device according to a second modification. [Figure 9] FIG. 11 is a plan view of a rotating body device in a third modified example. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. [Figure 11] FIG. 11 is a simplified plan view of a rotating body device in Modification 3. [Figure 12] FIG. 10 is a plan view of a rotating body device according to another modified example. [Figure 13] FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, several embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to matters described in the preceding embodiment may be assigned the same reference numerals, and duplicated explanations may be omitted. In each embodiment, when only a part of the configuration is described, the other parts of the configuration can be applied by referring to the other embodiment described previously.

[0012] In the following, the three mutually orthogonal directions are referred to as the X, Y, and Z directions. The plane defined by the X and Y directions is referred to as the XY plane, the plane defined by the X and Z directions is referred to as the XZ plane, and the plane defined by the Y and Z directions is referred to as the YZ plane. In the following, the Z direction is also referred to as the height direction.

[0013] (Embodiment) As shown in Figures 1, 2, 3, etc., the rotating body device 100 includes a circuit board 1, a first gear unit 10, a second gear unit 20, a motor unit 30, a drive circuit (a power module unit 40, a capacitor unit 50), a housing 60, etc. The rotating body device 100 is configured to be mountable on a vehicle. The rotating body device 100 is the driving source of the vehicle. The rotating body device 100 controls the driving of the motor unit 30 to rotate the wheels via a drive shaft 70.

[0014] The rotating body device 100 is mounted, for example, under the floor in the footwell area of ​​the front seats of the vehicle or under the luggage compartment of the vehicle. The rotating body device 100 may also be mounted under the brake mechanism of the vehicle. As will be explained later, the rotating body device 100 can be made low-profile. For this reason, the rotating body device 100 can be easily mounted in vehicle models where miniaturization is an issue.

[0015] <Rotation mechanism> The rotating body device 100 includes a rotation mechanism that includes a first gear unit 10, a second gear unit 20, and a motor unit 30. The first gear unit 10 and the second gear unit 20 rotate in conjunction with the rotation of the motor unit 30. The first gear unit 10, the second gear unit 20, and the motor unit 30 are also collectively referred to as the rotation mechanisms 10-30.

[0016] The motor section 30 includes a rotor, a stator (windings), and the like. The rotor is fixed to a motor shaft 31. The motor shaft 31 is the rotating shaft of the motor section 30. The stator is electrically connected to the power module section 40 and the like via a bus bar or the like. The motor section 30 is rotationally driven by the power module section 40. The motor section 30 is a heat-generating component that generates heat when the motor section 30 is rotationally driven.

[0017] The rotation of the motor unit 30 refers to the rotation of the rotor and motor shaft 31. The motor unit 30 can be said to have the rotor and motor shaft 31, which are the motor mechanism, as rotating parts. The motor shaft 31 is a straight line along the X direction. The direction along the motor shaft 31 corresponds to the motor axial direction. The radial direction of the motor unit 30 coincides with the Y direction. Therefore, the radial direction and the motor axial direction are perpendicular to each other.

[0018] As shown in Figures 3, 6, etc., the motor section 30 has a substantially cylindrical shape. The motor section 30 is arranged alongside the first gear section 10 in the direction of its rotation axis. In other words, the first gear section 10 is arranged in the axial direction of the motor shaft 31. Symbol CL1 in Figure 3 is a center line passing through the center of the motor section 30. The center line CL1 coincides with the motor shaft 31. The center line CL1 also passes through the center of the first gear section 10. Note that the motor section 30 can be, for example, a brushless three-phase motor. The motor section 30 can also be referred to as a second rotating body section.

[0019] The first gear section 10 includes a helical gear, a planetary gear, or the like. The first gear section 10 is connected to the motor shaft 31. Therefore, it can be said that the first gear section 10 rotates together with the motor section 30. Furthermore, the rotational axis direction of the first gear section 10 coincides with the axial direction of the motor shaft 31. The first gear section 10 is a heat-generating component that generates heat when rotated. As shown in Figures 3 and 6, the outline of the first gear section 10 is substantially cylindrical. The rotation of the first gear section 10 refers to the rotation of a helical gear or a planetary gear. It can also be said that the first gear section 10 includes a helical gear as a rotating part connected to the rotational axis of the motor section 30. The helical gear of the first gear section 10 corresponds to the first gear. The first gear section 10 can also be said to be a first rotating body section.

[0020] The second gear section 20 includes a helical gear, a differential gear, etc. The drive shaft 70 rotates in conjunction with the rotation of the motor shaft 31 (motor section 30). That is, the second gear section 20 is fixed to the drive shaft 70. The drive shaft 70 rotates together with the second gear section 20 as the first gear section 10 and the second gear section 20 rotate in conjunction with the rotation of the motor section 30. The drive shaft 70 coincides with the rotation axis of the second gear section 20. The second gear section 20 is a heat-generating component that generates heat when rotated. The drive shaft 70 is provided along the motor axial direction. That is, the drive shaft 70 is provided parallel to the motor shaft 31. The drive shaft 70 has a smaller diameter (shorter) than the motor section 30.

[0021] 3 is a center line passing through the center of the second gear portion 20. The center line CL2 coincides with the drive shaft 70. As shown in FIG. 4, the second gear portion 20 can also be said to have a lubricant 71 and a drive shaft 70 disposed in the shaft hole 65 of the housing 60. The lubricant 71 is provided to prevent wear of the drive shaft 70 and the base 61.

[0022] The rotation axis of the second gear portion 20 is a straight line along the X direction. Therefore, the center lines CL1 and CL2 are parallel to each other. In other words, the rotation axis of the second gear portion 20 and the rotation axis of the motor portion 30 are arranged parallel to each other. However, the center lines CL1 and CL2 may be misaligned in the Z direction. In this way, the rotating body device 100 has a dual rotation axis configuration.

[0023] As shown in Figures 3, 6, etc., the second gear portion 20 is arranged side by side with the first gear portion 10 in an arrangement direction different from the rotation axis direction of the first gear portion 10. In this embodiment, an example is adopted in which the first gear portion 10 and the second gear portion 20 are arranged side by side in a direction perpendicular to the rotation axis direction of the first gear portion 10. The first gear portion 10 and the second gear portion 20 are arranged side by side in the Y direction. However, the present disclosure is not limited to this. The direction in which the first gear portion 10 and the second gear portion 20 are arranged side by side is also simply referred to as the arrangement direction.

[0024] The second gear portion 20 is arranged to mesh with the first gear portion 10. In other words, the cog gears of the second gear portion 20 and the first gear portion 10 mesh with each other. Therefore, the second gear portion 20 rotates together with the first gear portion 10. The second gear portion 20 has a substantially cylindrical shape. The rotation of the second gear portion 20 corresponds to the rotation of the cog gear, differential gear, and drive shaft 70. The second gear portion 20 includes a cog gear that is arranged adjacent to the cog gear of the first gear portion 10 and rotates in mesh with it. The second gear portion 20 can also be called a third rotating body portion. The second gear portion 20 rotates integrally with the drive shaft 70. Therefore, the drive shaft 70 can also be considered a part of the third rotating body.

[0025] As shown in FIG. 3 and the like, the first gear portion 10 and the second gear portion 20 have substantially the same length in the X direction. Further, the first gear portion 10 and the second gear portion 20 are arranged side by side in the Y direction. Therefore, the region adjacent to the second gear portion 20 and the motor portion 30 becomes a dead space. For example, the region indicated by DS1 in FIG. 6 is part of the dead space. Note that the region adjacent to the second gear portion 20 and the motor portion 30 is the region adjacent to the second gear portion 20 in the X direction and the region adjacent to the motor portion 30 in the Y direction (arrangement direction). The second gear portion 20 here is a portion including a spur gear and a differential gear except for the drive shaft 70.

[0026] As shown in FIGS. 3 and 6, the respective rotating mechanisms 10 to 30 have different diameters. The relationship between the diameter D1 of the first gear portion 10, the diameter D2 of the second gear portion 20, and the diameter D3 of the motor portion 30 is D1 < D2 < D3. That is, it can be said that the motor portion 30 has a larger physical size in the diameter direction than the first gear portion 10 and the second gear portion 20.

[0027] Note that D1 is the diameter of the portion that is the maximum diameter of the first gear portion 10. D2 is the diameter of the portion that is the maximum diameter of the second gear portion 20. D3 is the diameter of the portion that is the maximum diameter of the motor portion 30. The diameters of the respective rotating mechanisms 10 to 30 can also be regarded as the diameters of the portions in the housing 60 that accommodate the respective rotating mechanisms 10 to 30.

[0028] Thus, in the present embodiment, as an example, rotating mechanisms 10 to 30 having different diameters are employed. However, the present disclosure is not limited to this. That is, the rotating mechanisms 10 to 30 may have the same diameter.

[0029] Note that, as shown in FIG. 4, the second gear portion 20 includes portions having different diameters in the X direction. The second gear portion 20 has a smaller diameter in the direction from the first gear portion 10 toward the motor portion 30. Therefore, a dead space is formed between the second gear portion 20 and the power module portion 40 to be described later.

[0030] That is, the dead space here is the region in the Z direction between the small diameter portion of the second gear unit 20 and the power module unit 40. The dead space can also be said to be the region in the Z direction between the third rotating body and the power module unit 40. Furthermore, part of the dead space is also formed between the power module unit 40 and the drive shaft 70 in the Z direction.

[0031] The dead space here can also be called a dead space directly below the power module section 40 because it is formed directly below the power module section 40. The dead space directly below includes the opposing region of the power module section 40.

[0032] As shown in Figure 6, the second gear section 20 and the motor section 30 have vertices at different positions in the height direction. Therefore, an imaginary plane T2 passing through the vertex of the second gear section 20 is at a different position in the height direction from an imaginary plane T1 passing through the vertex of the motor section 30. The imaginary planes T1 and T2 are planes along the XY plane. The imaginary plane T1 can also be considered an imaginary plane parallel to the imaginary plane T2. The space between the imaginary planes T1 and T2 is a dead space DS2 in the height direction.

[0033] <Drive circuit> The drive circuit is a circuit that drives and rotates the motor unit 30, which is one of the rotation mechanisms. The drive circuit includes a power module unit 40 and a capacitor unit 50. Hereinafter, the power module unit 40 and the capacitor unit 50 will also be collectively referred to as the drive circuits 40-50. The drive circuits 40-50 may include a circuit board 1.

[0034] The power module unit 40 includes a semiconductor device 41 including a plurality of semiconductor switching elements. The semiconductor device 41 constitutes a three-phase inverter including a plurality of semiconductor switching elements. The semiconductor switching elements may be MOSFETs, IGBTs, or the like. As shown in FIG. 4 , the semiconductor device 41 is electrically connected to the circuit board 1 via terminals 44.

[0035] In the semiconductor device 41, the semiconductor switching elements are controlled to be turned on and off by control signals from the circuit board 1. The power module unit 40 is a heat-generating component that generates heat when rotated. That is, when the power module unit 40 is rotated, the semiconductor switching elements are turned on and off, causing the semiconductor device 41 to generate heat. The power module unit 40 is mounted on a heat sink 42 that is provided with fins 43 for heat dissipation in order to cool the semiconductor device 41.

[0036] As shown in Fig. 4, at least a portion of the power module unit 40 is disposed opposite the second gear unit 20 in the Z direction. The power module unit 40 is disposed in the direction of the motor shaft 31 relative to the motor unit 30 and the capacitor unit 50. The power module unit 40 is also disposed opposite the drive shaft in the Z direction. The Z direction corresponds to an orthogonal direction that is perpendicular to the motor axial direction and radial direction.

[0037] The power module section 40 is electrically connected to the capacitor section 50. Therefore, it is preferable that the power module section 40 is disposed in close proximity to the capacitor section 50. This allows the rotating body device 100 to reduce loss between the power module section 40 and the capacitor section 50. As a result, the rotating body device 100 can achieve higher output.

[0038] 6, the power module section 40 is disposed between the imaginary plane T1 and the imaginary plane T2. That is, the power module section 40 is disposed in the dead space DS2. However, the power module section 40 does not have to be disposed between the imaginary plane T1 and the imaginary plane T2.

[0039] The capacitor unit 50 is a smoothing capacitor connected to the input side of the three-phase inverter. As shown in FIG. 4 , the capacitor unit 50 includes a capacitor element 51, a capacitor case 52, a fixing member 53, and the like. The positive terminal of the capacitor element 51 is connected to the P bus bar 81a, and the negative terminal is connected to the N bus bar 81b. The capacitor element 51 is housed in the capacitor case 52. For example, the capacitor case 52 may be one in which the capacitor element 51 is sealed with resin while the P bus bar 81a and the N bus bar 81b are partially exposed. The capacitor case 52 is fixed to the housing 60 by the fixing member 53. The capacitor unit 50 is smaller than the motor unit 30.

[0040] As shown in Figures 3, 4, and 6, at least a portion of the capacitor unit 50 is disposed opposite the drive shaft 70 in the Z direction. Furthermore, at least a portion of the capacitor unit 50 is disposed opposite the motor unit 30 in the Y direction (the radial direction of the motor unit 30), and opposite the second gear unit 20 in the X direction. In other words, the capacitor unit 50 is disposed adjacent to the second gear unit 20 and the motor unit 30. Therefore, the capacitor unit 50 is disposed in the dead space DS1. This prevents the rotating body device 100 from becoming larger in size in the Z direction.

[0041] It can be said that at least a portion of the capacitor section 50 is disposed within the opposing region of the motor section 30 and within the opposing region of the second gear section 20. Furthermore, the capacitor section 50 is preferably disposed within the opposing region of the second gear section 20 in the X direction and within a range of the diameter of the second gear section 20 along the Y direction and within a range of the diameter of the second gear section 20 along the Z direction.

[0042] As described above, the power module unit 40 and the capacitor unit 50 are disposed opposite the drive shaft 70 in the Z direction. As shown in Fig. 4, the distance between the power module unit 40 and the drive shaft 70 is wider than the distance between the capacitor unit 50 and the drive shaft 70. That is, the dead space on the drive shaft 70 side of the base 61, relative to the power module unit 40, is wider than the dead space on the drive shaft 70 side relative to the capacitor unit 50. The distance here is the distance in the Z direction.

[0043] <Case> As shown in Figures 1, 2, 3, etc., the housing 60 includes a base 61, an upper cover 62, a side cover 63, etc. The housing 60 houses the rotation mechanisms 10 to 30 and the drive circuits 40 to 50. The base 61 is mainly composed of a metal such as aluminum. It can also be said that the base 61 is mainly composed of a metal that has a higher thermal conductivity than resin, etc. The base 61 corresponds to a metal member.

[0044] The base 61 has a storage space that houses the rotation mechanisms 10-30 and the drive circuits 40-50. The base 61 also has a storage space that is open in two directions, the X direction and the Z direction. The top cover 62 is a member that closes one of the openings when attached to the base 61. The side cover 63 is a member that closes the other opening when attached to the base 61. The housing 60 corresponds to a case.

[0045] In this embodiment, as an example, a housing 60 including a base 61, an upper cover 62, and a side cover 63 is used. However, the present disclosure is not limited to this. The housing 60 may also be a housing composed of two components, such as the base 61 and the upper cover 62.

[0046] As shown in Figures 3 and 4, the base 61 is provided with a mounting portion 64 on which the power module unit 40 is mounted. The power module unit 40 is mounted on the mounting portion 64 via a heat sink 42. The mounting portion 64 is provided with a module cooling path 92c, which is part of a refrigerant flow path. The module cooling path 92c is a portion that is recessed from the surrounding area. The power module unit 40 is mounted on the mounting portion 64 with the fins 43 of the heat sink 42 positioned in the module cooling path 92c. The refrigerant flow path will be described in detail later.

[0047] As shown in Figure 4, the base 61 is provided with a shaft hole 65 in which the drive shaft 70 is disposed. In addition, a lubricant 71 is disposed in the shaft hole 65 between the drive shaft 70 and the base 61. The lubricant 71 is provided to reduce the frictional force and frictional heat generated between the drive shaft 70 and the base 61 when the drive shaft 70 rotates. The lubricant 71 is also provided to prevent wear of the drive shaft 70 and the base 61. The shaft hole 65 corresponds to an axle hole.

[0048] The base 61 is provided with a rotating body accommodating portion for accommodating the rotation mechanisms 10 to 30. The rotating body accommodating portion is a curved hole that follows the outer shape of each of the rotation mechanisms 10 to 30. Lubricating oil may be placed in the rotating body accommodating portion in the area that accommodates the first gear portion 10 and the second gear portion 20.

[0049] 3, 4, and 5, the base 61 (housing 60) is provided with a refrigerant flow path through which a refrigerant such as cooling water flows. The refrigerant flow path is formed, for example, by cutting the base 61 with a cutting tool.

[0050] The refrigerant flow path is provided to cool the motor section 30, the power module section 40, the condenser section 50, etc. The base 61 is also provided with two refrigerant ports 91 for allowing the refrigerant to flow in and out of the refrigerant flow path. The refrigerant is supplied from one refrigerant port 91, passes through the refrigerant flow path, and is discharged from the other refrigerant port 91. Note that in this embodiment, only one refrigerant port 91 is shown. The refrigerant port 91 can be considered to be part of the refrigerant flow path.

[0051] The refrigerant flow path includes a refrigerant port 91, an inlet path 92a, a supply hole 92b, a module cooling path 92c, an outlet hole 92d, an outlet path 92e, a first opposing cooling path 93, a second opposing cooling path 94, and a motor cooling path 95. The refrigerant flow paths are interconnected to allow a continuous flow of refrigerant. The supply hole 92b corresponds to a supply hole. The outlet hole 92d corresponds to a discharge hole.

[0052] The refrigerant flow path includes a module cooling path 92c for mainly cooling the power module section 40, counter cooling paths 93 and 94 for mainly cooling the condenser section 50, and a motor cooling path 95 for mainly cooling the motor section 30. The inlet path 92a and the supply hole 92b are flow paths connecting the refrigerant port 91 and the module cooling path 92c. The outlet hole 92d and the outlet path 92e are flow paths connecting the module cooling path 92c and the counter cooling paths 93 and 94. The counter cooling paths 93 and 94 can also be referred to as condenser refrigerant flow paths. The counter cooling paths 93 and 94 correspond to condenser refrigerant paths.

[0053] The coolant supplied to the module cooling path 92c and the coolant discharged from the module cooling path 92c flow through the inlet path 92a, the supply holes 92b, the discharge holes 92d, and the outlet path 92e. The inlet path 92a, the supply holes 92b, the module cooling path 92c, the discharge holes 92d, and the outlet path 92e can also be referred to as a module coolant flow path. The module coolant flow path corresponds to the module coolant path.

[0054] As shown in FIG. 3, the inlet passage 92a is provided along the Y direction. One end of the inlet passage 92a is connected to a refrigerant port 91 for allowing the refrigerant to flow in, and the other end is connected to a supply hole 92b. In other words, the inlet passage 92a is connected to the outside via the refrigerant port 91. The inlet passage 92a is provided from the refrigerant port 91 to the end of the module cooling passage 92c on the Y direction side. The outside is the outside of the rotating body device 100. The outside is also the outside of the housing 60. The inlet passage 92a corresponds to an external connection passage.

[0055] The inlet passage 92a is provided in an area facing the module cooling passage 92c in the Z direction. In the present embodiment, as an example, the inlet passage 92a is provided at a position biased toward the condenser section 50 in the facing area. In other words, the inlet passage 92a is provided at the end of the facing area that is closer to the condenser section 50. The inlet passage 92a is also provided closer to the condenser section 50 than to the motor section 30 in the Y direction, based on the center of the module cooling passage 92c.

[0056] Therefore, the rotating body device 100 can be provided with the inlet channel 92a by utilizing the dead space directly below it. This prevents the size of the rotating body device 100 from increasing in the X and Y directions. Furthermore, the rotating body device 100 can be provided with the refrigerant port 91 on the opposite side to the motor unit 30.

[0057] 4, the inflow passage 92a is provided between the power module section 40 and the second gear section 20 in the Z direction. It can also be said that the inflow passage 92a is provided between the module cooling passage 92c and the second gear section 20 in the Z direction. In other words, the inflow passage 92a is provided in the dead space directly below. Note that in the present disclosure, the second gear section 20 does not necessarily have to be provided between the inflow passage 92a and the drive shaft 70.

[0058] Furthermore, the position of the inlet passage 92a in the Z direction is different from that of the outlet passage 92e, which will be described later. The inlet passage 92a is provided so as to intersect with the outlet passage 92e at an elevated level. The position of the inlet passage 92a in the Z direction is also different from that of a first opposed cooling passage 93, which will be described later. This makes it possible to prevent the rotating body device 100 from becoming larger in size in the X and Y directions.

[0059] As shown in FIG. 5, the supply hole 92b is provided along the Z direction. One end of the supply hole 92b opens to the module cooling path 92c, and the other end is connected to the inlet path 92a. One end of the supply hole 92b is an inlet for the refrigerant to the module cooling path 92c. One end of the supply hole 92b can also be considered a supply port for the refrigerant. The supply hole 92b can also be considered to open to the lower surface of the module cooling path 92c. The lower surface of the module cooling path 92c is the surface opposite the power module section 40. In other words, the power module section 40, the module cooling path 92c, and the supply hole 92b are provided in this order in the Z direction. The supply hole 92b corresponds to the hole portion and the second hole portion.

[0060] In this embodiment, as a preferred example, the supply holes 92b are arranged perpendicular to the XY plane. However, the present disclosure is not limited to this. The supply holes 92b may be inclined with respect to the XY plane.

[0061] The supply holes 92b are provided in an area facing the module cooling paths 92c in the Z direction. The supply holes 92b may also be provided in a position facing the power module section 40. In other words, the supply holes 92b are provided in the dead space directly below.

[0062] 3 and 4, the module cooling path 92c is a portion recessed from the surrounding area of ​​the module cooling path 92c. The module cooling path 92c is provided in an area facing the power module section 40 in the Z direction. The supply holes 92b are provided in an area facing the motor section 30 in the X direction. The module cooling path 92c corresponds to the module facing portion.

[0063] The module cooling path 92c is a larger space than the inlet path 92a and the first opposing cooling path 93 (described later) in order to cool the entire area of ​​the power module section 40. The module cooling path 92c is large enough to accommodate the entire power module section 40 in the area opposing the module cooling path 92c in the Z direction. The module cooling path 92c can be said to be provided in the dead space directly below. The module cooling path 92c can also be said to be a cooling chamber through which a refrigerant flows. The size here corresponds to the area in the XY plane.

[0064] 3, the module cooling path 92c is in communication with the supply hole 92b and the discharge hole 92d. The supply hole 92b and the discharge hole 92d are holes or flow paths extending in the Z direction. The supply hole 92b can also be referred to as a supply path. The discharge hole 92d can also be referred to as a discharge path.

[0065] As shown in FIG. 4, the discharge hole 92d is provided along the Z direction. The discharge hole 92d is provided in a positional relationship in which it intersects with the inlet path 92a in the X direction. One end of the discharge hole 92d opens to the module cooling path 92c, and the other end is connected to the outlet path 92e. One end of the discharge hole 92d is an outlet for the refrigerant for the module cooling path 92c. The one end of the discharge hole 92d can also be considered as a discharge port for the refrigerant. The discharge hole 92d can also be considered as opening to the bottom surface of the module cooling path 92c. In other words, the power module unit 40, the module cooling path 92c, and the discharge hole 92d are provided in this order in the Z direction. The discharge hole 92d corresponds to a hole portion and a first hole portion.

[0066] In this embodiment, as a preferred example, the discharge holes 92d are arranged perpendicular to the XY plane. However, the present disclosure is not limited to this. The discharge holes 92d may be inclined with respect to the XY plane.

[0067] The discharge hole 92d is provided in an area facing the module cooling path 92c in the Z direction. The discharge hole 92d may also be provided in a position facing the power module section 40. That is, the discharge hole 92d is provided in the dead space directly below the power module section 40. The discharge hole 92d is also provided in an area facing the condenser section 50 in the X direction.

[0068] In this way, the rotating body device 100 has a configuration in which the discharge hole 92d is provided in the dead space directly below in addition to the supply hole 92b and the module cooling path 92c, which prevents the rotating body device 100 from becoming larger in size in the X and Y directions.

[0069] The refrigerant flows through the refrigerant port 91, inlet path 92a, supply hole 92b, module cooling path 92c, and outlet hole 92d in this order. That is, the refrigerant is supplied from the supply hole 92b to the module cooling path 92c. As shown by the dotted white arrow in Figure 3, the refrigerant flows from the supply hole 92b to the outlet hole 92d within the module cooling path 92c. The refrigerant is then discharged from the module cooling path 92c to the outlet hole 92d.

[0070] In the supply hole 92b, the refrigerant flows in the Z direction from the drive shaft 70 side to the power module unit 40 side. On the other hand, in the discharge hole 92d, the refrigerant flows in the Z direction from the power module unit 40 side to the drive shaft 70 side.

[0071] Therefore, it is preferable that the supply hole 92b and the discharge hole 92d be located at positions where the refrigerant flows throughout the entire module cooling path 92c. The supply hole 92b and the discharge hole 92d are located so as to communicate with different ends of the module cooling path 92c in the XY plane. The different ends are the two ends in the Y direction. It can also be said that the discharge hole 92d is located on the opposite side of the supply hole 92b in the Y direction with respect to the center of the power module section 40. It can also be said that the supply hole 92b is located closer to the motor section 30 than to the condenser section 50 in the Y direction with respect to the center of the module cooling path 92c.

[0072] The center of the power module unit 40 may coincide with the center of the module cooling path 92c. The center of the power module unit 40 is the center of the power module unit 40 in the XY plane. Similarly, the center of the module cooling path 92c is the center of the module cooling path 92c in the XY plane.

[0073] As a result, the refrigerant passes through inlet path 92a, is supplied from supply hole 92b to module cooling path 92c, makes a U-turn, and flows to outlet hole 92d. In other words, the refrigerant flows in a direction from condenser unit 50 to motor unit 30, changes direction, and flows in a direction from motor unit 30 to condenser unit 50.

[0074] In this embodiment, as an example, the supply hole 92b and the discharge hole 92d are provided diagonally. That is, the supply hole 92b and the discharge hole 92d are provided at different positions in the X direction and at one end and the other end in the Y direction. However, the present disclosure is not limited to this. For example, the supply hole 92b and the discharge hole 92d may be provided at the same position in the X direction but at positions separated in the Y direction.

[0075] 3 and 4, the outflow path 92e is provided along the X direction. The outflow path 92e is provided in a positional relationship in which it intersects with the inflow path 92a in the Z direction. One end of the outflow path 92e communicates with the discharge hole 92d, and the other end communicates with the first opposed cooling path 93. In other words, the outflow path 92e is a flow path that connects the module cooling path 92c and the first opposed cooling path 93. In other words, the outflow path 92e is provided closer to the condenser section 50 than the center of the module cooling path 92c in the Y direction. The outflow path 92e corresponds to a connecting path.

[0076] The outflow path 92e is provided in an area facing the module cooling path 92c in the Z direction. In the present embodiment, as an example, the outflow path 92e is provided at a position biased toward the coolant port 91 in the facing area. In other words, the outflow path 92e can be said to be provided at the end of the facing area on the coolant port 91 side.

[0077] As shown in FIG. 4, the outflow path 92e is provided between the power module unit 40 and the second gear unit 20 in the Z direction. It can also be said that the outflow path 92e is provided between the module cooling path 92c and the second gear unit 20 in the Z direction. It can also be said that the outflow path 92e is located closer to the drive shaft 70 than the condenser unit 50 in the Z direction. In other words, the outflow path 92e is provided in the dead space directly below. This facilitates the machining of the outflow path 92e in the rotating body device 100. In the present disclosure, the second gear unit 20 does not necessarily need to be provided between the outflow path 92e and the drive shaft 70.

[0078] Outlet passage 92e is provided continuously with first opposed cooling passage 93. In other words, there is no gap between outlet passage 92e and first opposed cooling passage 93. Therefore, first opposed cooling passage 93 can be said to be an extension of outlet passage 92e.

[0079] As will be explained later, the first opposed cooling paths 93 are provided in the opposing region of the condenser section 50. Therefore, the continuous outflow paths 92e and first opposed cooling paths 93 are provided from the opposing region of the power module section 40 to the opposing region of the condenser section 50. The outflow paths 92e and the first opposed cooling paths 93 can be collectively referred to as a continuous opposed flow path.

[0080] The present disclosure can also employ a configuration in which the refrigerant flows in the following order: outflow path 92e, discharge hole 92d, module cooling path 92c, supply hole 92b, and inflow path 92a. In this case, the refrigerant flows through outflow path 92e and is supplied to module cooling path 92c from discharge hole 92d. After flowing through module cooling path 92c, the refrigerant is discharged through supply hole 92b and flows into inflow path 92a.

[0081] 3 and 4, first opposed cooling paths 93 are provided along the X direction. One end of first opposed cooling paths 93 communicates with outlet paths 92e, and the other end communicates with second opposed cooling paths 94. First opposed cooling paths 93 are provided in an area opposing condenser section 50 in the Z direction. In other words, first opposed cooling paths 93 are provided closer to condenser section 50 than the center of module cooling path 92c in the Y direction.

[0082] 4, first opposed cooling paths 93 are provided between condenser section 50 and drive shaft 70 in the Z direction. Furthermore, first opposed cooling paths 93 can be said to be disposed closer to drive shaft 70 than condenser section 50 in the Z direction. In other words, first opposed cooling paths 93 are provided in the dead space between condenser section 50 and drive shaft 70. This dead space is part of dead space DS1. Similarly, second opposed cooling paths 94, which will be described later, are provided in the dead space between condenser section 50 and drive shaft 70.

[0083] Therefore, the rotating body device 100 can easily cool the capacitor section 50. As a result, the rotating body device 100 can increase the current value at which the capacitor section 50 reaches its heat-resistant temperature, thereby achieving higher output. Furthermore, the rotating body device 100 allows the first opposed cooling paths 93 to be easily processed.

[0084] 3, the second opposed cooling passage 94 is provided along the Y direction. One end of the second opposed cooling passage 94 is connected to the first opposed cooling passage 93, and the other end is connected to the motor cooling passage 95. The motor cooling passage 95 is provided in the circumferential direction around the rotation axis of the motor section 30. The motor cooling passage 95 is provided opposite almost the entire circumference of the motor section 30, with a part of the base 61 interposed therebetween.

[0085] Second opposed cooling passage 94 is provided between condenser unit 50 and drive shaft 70 in the Z direction. In other words, second opposed cooling passage 94 is provided in the dead space between condenser unit 50 and drive shaft 70. This dead space is part of dead space DS1.

[0086] 3, the opposing cooling paths 93, 94 can be said to be provided in an L-shape on the XY plane. In this embodiment, as an example, an example is adopted in which the angle between the first opposing cooling path 93 and the second opposing cooling path 94 is 90 degrees. However, the present disclosure is not limited to this.

[0087] It is sufficient that at least a portion of first opposed cooling path 93 and second opposed cooling path 94 is provided facing condenser section 50. In other words, first opposed cooling path 93 and second opposed cooling path 94 may be provided facing the entire area of ​​the bottom surface of condenser section 50 along the XY plane.

[0088] The condenser unit 50 is disposed opposite the drive shaft 70 with the opposed cooling paths 93, 94 disposed therebetween. That is, the opposed cooling paths 93, 94 are disposed between the condenser unit 50 and the drive shaft 70. The drive shaft 70 is provided with the lubricating oil 71 between it and the shaft hole 65. The lubricating oil 71 generates heat as the drive shaft 70 rotates. Therefore, the lubricating oil 71 can be considered a heat-generating component. However, since the opposed cooling paths 93, 94 are disposed in the rotating body device 100, the transfer of heat from the lubricating oil 71 to the condenser unit 50 can be suppressed.

[0089] The condenser unit 50 is cooled primarily by the refrigerant flowing through the opposing cooling paths 93 and 94. However, the condenser unit 50 is also arranged opposite the inlet path 92a, the outlet hole 92d, and the motor cooling path 95. Therefore, the condenser unit 50 is cooled not only by the refrigerant flowing through the opposing cooling paths 93 and 94, but also by the refrigerant flowing through the inlet path 92a, the outlet hole 92d, and the motor cooling path 95. Therefore, the condenser unit 50 can be said to have three cooling surfaces. Note that the present disclosure can also be applied to a condenser unit 50 having two cooling surfaces. Naturally, a condenser unit 50 having three cooling surfaces can achieve better cooling efficiency than a condenser unit 50 having two cooling surfaces.

[0090] The three cooling surfaces are the wall surface along the YZ plane, the wall surface along the ZY plane, and the wall surface along the XZ plane in the condenser section 50. The wall surface along the XY plane is the opposing surface facing the opposing cooling paths 93 and 94. The wall surface along the YZ plane is the opposing surface facing the inlet path 92a and the outlet hole 92d. The XZ plane is the opposing surface facing the motor cooling path 95.

[0091] It can be said that the rotating body device 100 is provided with a motor cooling path 95 as a heat-shielding layer in the region where the capacitor unit 50 faces the motor unit 30 as a heat-generating component. It can also be said that the rotating body device 100 is provided with opposing cooling paths 93, 94 as a heat-shielding layer in the region where the capacitor unit 50 faces the lubricating oil 71 as a heat-generating component. In this embodiment, as described above, it can be said that heat-shielding layers are arranged opposite two or more surfaces of the capacitor unit 50 that face the heat-generating component.

[0092] The heat-shielding layer is a portion for suppressing heat transfer from the heat-generating components to the capacitor section 50. In this embodiment, a refrigerant flow path is used as an example of the heat-shielding layer. However, the present disclosure is not limited to this. The heat-shielding layer may be made of rubber (polymer member) or plate material with low thermal conductivity.

[0093] Furthermore, the capacitor section 50 may be mounted on the base 61 via rubber as a heat-shielding layer. In this case, the capacitor section 50 is supported by the heat-shielding layer. The heat-shielding layer provides a cushioning effect to the capacitor section 50. Therefore, the rotating body device 100 can improve the earthquake resistance of the capacitor section 50 compared to a configuration without a heat-shielding layer.

[0094] The refrigerant flow path can cool the surrounding space as the refrigerant flows through it. In other words, a cooling space is formed around the refrigerant flow path in the rotating body device 100. The condenser unit 50 is disposed in this cooling space. Therefore, the rotating body device 100 can efficiently cool the condenser unit 50.

[0095] As shown in FIGS. 1 and 2, the rotating body device 100 includes a PN connector 81 and a communication connector 82. The PN connector 81 and the communication connector 82 are provided in the housing 60. The PN connector 81 is a portion where the tips of the P bus bar 81a and the N bus bar 81b are disposed. A power source such as a battery is connected to the PN connector 81. When a power source is connected to the PN connector 81, the P bus bar 81a and the N bus bar 81b are connected to the power source.

[0096] The PN connector 81 is provided at a position different from the refrigerant flow path in the housing 60. More specifically, the PN connector 81 is provided at a position different from the refrigerant port 91 in the housing 60. Furthermore, the tips of the P bus bar 81a and the N bus bar 81b are arranged at the PN connector 81 on one of the six faces of the capacitor unit 50 on which the refrigerant water paths are not arranged opposite each other. This allows the rotating body device 100 to suppress leakage even if the refrigerant leaks from the refrigerant flow path such as the refrigerant port 91. The PN connector 81 corresponds to an external connection terminal of the drive circuit.

[0097] The communication connector 82 is a communication interface between the circuit board 1 and an electronic control device or the like provided outside the rotating body device 100. For the same reason as the PN connector 81, the communication connector 82 is provided at a position different from the refrigerant flow path in the housing 60. However, the rotating body device 100 does not necessarily have to be provided with the communication connector 82.

[0098] <Effects> As described above, in the rotating body device 100, the capacitor section 50 is smaller than the motor section 30. Therefore, in the rotating body device 100, the dead space in the opposing area of ​​the power module section is more likely to be larger on the capacitor section side than on the motor section side, based on the center of the module opposing section.

[0099] The outflow passage 92e, a portion of the first opposed cooling passage 93, and the discharge hole 92d are provided radially closer to the condenser section than to the motor section, i.e., in an area with a relatively large dead space. Therefore, the outflow passage 92e, a portion of the first opposed cooling passage 93, and the discharge hole 92d can be easily processed in the rotating body device 100. Therefore, the outflow passage 92e, a portion of the first opposed cooling passage 93, and the discharge hole 92d in the rotating body device 100 can be prevented from having a shape that obstructs the flow of refrigerant.

[0100] Furthermore, in the rotating body device 100, the capacitor section 50 is disposed adjacent to the second gear section 20 and the motor section 30. This allows the rotating body device 100 to effectively utilize the dead space DS1. This allows the rotating body device 100 to be made smaller in size.

[0101] There is a demand for a smaller rotating body device 100. To achieve this, the rotating body device 100 needs to have the rotation mechanisms 10-30 and the drive circuits 40-50 located closer to each other. In this case, the rotating body device 100 also has a closer distance between the capacitor unit 50 and the heat-generating components. This makes it easier for heat to be transferred from the heat-generating components to the capacitor unit 50. In other words, the capacitor unit 50 is susceptible to heat damage. The output of the capacitor unit 50 is limited by the heat damage. However, by providing a refrigerant flow path in the dead space between the rotors of the base 61, the rotating body device 100 can suppress heat damage to the condenser unit 50 while preventing the size from increasing.

[0102] Furthermore, in the rotating body device 100, the power module section 40 is disposed in the dead space DS2 between the imaginary plane T1 and the imaginary plane T2. This allows the rotating body device 100 to effectively utilize the dead space DS2. This allows the rotating body device 100 to be made smaller in size in the height direction. In other words, the rotating body device 100 can be made low-profile.

[0103] The rotating body device 100 is provided with a module cooling path 92c between the second gear portion 20 and the power module portion 40. Therefore, the rotating body device 100 can suppress heat transfer between the second gear portion 20 and the power module portion 40.

[0104] In the rotating body device 100, the size relationship between the first gear portion 10 and the second gear portion 20 may be reversed. In other words, the relationship between the diameter D1 of the first gear portion 10, the diameter D2 of the second gear portion 20, and the diameter D3 of the motor portion 30 is D2 <D1<D3であってもよい。

[0105] The preferred embodiments of the present disclosure have been described above. However, the present disclosure is not limited to the above embodiments, and various modifications are possible within the scope of the present disclosure. Below, Modifications 1 and 2 will be described as other embodiments of the present disclosure. The above embodiments and Modifications 1 and 2 can be implemented independently, or can be implemented in appropriate combinations. The present disclosure is not limited to the combinations shown in the embodiments, and can be implemented in various combinations.

[0106] (Variation 1) As shown in Fig. 7, second opposed cooling paths 94 may extend in a direction away from motor section 30. In other words, second opposed cooling paths 94 may be provided as a discharge flow path for the refrigerant. Fig. 7 is a plan view corresponding to Fig. 3.

[0107] (Variation 2) As shown in FIG. 8, the rotating body device 100 has a heat dissipation member 96 disposed between the condenser section 50 and the opposing cooling paths 93, 94. FIG. 8 is a cross-sectional view corresponding to FIG. 4. The heat dissipation member 96 may be in a sheet or gel form. The heat dissipation member 96 is provided in at least a portion of the opposing area between the condenser section 50 and the opposing cooling paths 93, 94. In addition, in this embodiment, as an example, the heat dissipation member 96 is disposed in a recess in the base 61. However, the present disclosure is not limited to this. The heat dissipation member 96 may also be provided on a flat, non-recessed surface of the base 61. The heat dissipation member 96 can also be considered a heat shielding member.

[0108] By providing the heat dissipation member 96, the rotating body device 100 can reduce the thermal resistance between the condenser section 50 and the second opposed cooling path 94. Therefore, the rotating body device 100 can improve the cooling effect compared to a configuration that does not include the heat dissipation member 96. The configuration of Modification 1 can be implemented in combination with the above-described embodiment.

[0109] (Variation 3) 9, 10, and 11, the rotating body device 100 may include a temperature detection device 200. Note that Fig. 11 is simplified to show the positional relationship between the power module unit 40, the temperature detection device 200, and the capacitor unit 50.

[0110] The temperature detecting device 200 is a device that detects the temperature (refrigerant temperature) of the refrigerant flowing through a refrigerant flow path. In particular, the temperature detecting device 200 is a device that detects the temperature of the refrigerant before heat exchange. The temperature detecting device 200 includes a detecting unit 201 and a wiring unit 202 electrically connected to the detecting unit 201. The wiring unit 202 is electrically connected to the circuit board 1. The detecting unit 201 outputs an electric signal (sensor signal) corresponding to the temperature of the refrigerant. Furthermore, the detecting unit 201 outputs the sensor signal to the circuit board 1 via the wiring unit 202.

[0111] The temperature detecting device 200 is disposed in the X direction relative to the inflow channel 92a. The temperature detecting device 200 is disposed immediately adjacent to the inflow channel 92a in the X direction. In other words, the temperature detecting device 200 is disposed closer to the inflow channel 92a than any other portion of the refrigerant flow path other than the inflow channel 92a. In other words, the temperature detecting device 200 is disposed adjacent to the inflow channel 92a in the X direction.

[0112] The module cooling path 92c is a refrigerant flow path mainly for cooling the power module section 40. In other words, the refrigerant flowing through the module cooling path 92c includes refrigerant after heat exchange. On the other hand, the inflow path 92a is a refrigerant flow path for introducing refrigerant into the module cooling path 92c. Therefore, the refrigerant flowing through the inflow path 92a is refrigerant before heat exchange. Furthermore, the module cooling path 92c and the inflow path 92a are provided with a gap in the Z direction. For example, the gap between the module cooling path 92c and the inflow path 92a is such that heat from the refrigerant after heat exchange is not easily transferred to the refrigerant before heat exchange.

[0113] One end of inlet path 92a communicates with refrigerant port 91, and the other end communicates with supply hole 92b, which is located closer to motor unit 30 than to condenser unit 50 in the Y direction with respect to the center of module cooling path 92c.

[0114] In this way, the rotating body device 100 has a longer refrigerant flow path through which the refrigerant flows before heat exchange because it is provided with the inlet path 92a. In other words, the rotating body device 100 has a longer refrigerant flow path through which the refrigerant flows before heat exchange than a configuration in which the refrigerant port 91 is directly provided in the module cooling path 92c. It can be said that the rotating body device 100 has an increased number of refrigerant flow paths through which the refrigerant flows before heat exchange.

[0115] Therefore, by arranging the temperature detection device 200 as described above, the temperature detection device 200 is less affected by the refrigerant temperature after heat exchange. In other words, the temperature detection device 200 can more easily detect the refrigerant temperature before heat exchange. It can also be said that the temperature detection device 200 can output a sensor signal indicating a temperature similar to the refrigerant temperature before heat exchange. It can also be said that the temperature detection device 200 can achieve detection accuracy equivalent to that of directly detecting the refrigerant temperature before heat exchange. Therefore, the rotating body device 100 can improve the detection accuracy of the temperature detection device 200.

[0116] Furthermore, the rotating body device 100 has a long refrigerant flow path through which the refrigerant flows before heat exchange. It can also be said that the rotating body device 100 has many areas where it is easy to detect the refrigerant temperature before heat exchange. Therefore, the rotating body device 100 has many placement areas where the detection accuracy of the temperature detection device 200 can be improved, and the degree of freedom in placement of the temperature detection device 200 can be improved.

[0117] In this embodiment, the temperature detecting device 200 is arranged closer to the condenser unit 50 than the inflow path 92a in the X direction. That is, as shown in Fig. 9, the rotating body device 100 is arranged in the order of the inflow path 92a, the temperature detecting device 200, and the condenser unit 50 in the X direction. Also, the rotating body device 100 is arranged in the order of the discharge hole 92d, the inflow path 92a, the temperature detecting device 200, and the condenser unit 50 in the X direction.

[0118] 10 and 11, the temperature detecting device 200 is disposed between the bus bars 81a and 81b and the base 61 in the Z direction. The temperature detecting device 200 has a configuration in which at least the detecting unit 201 is disposed between the bus bars 81a and 81b and the base 61. It can also be said that the temperature detecting device 200 is disposed opposite the bus bars 81a and 81b in the Z direction.

[0119] As a result, the rotating body device 100 can place the temperature detecting device 200 by utilizing the dead space between the bus bars 81a, 81b and the base 61. Therefore, the rotating body device 100 can suppress an increase in the size in the X direction while providing the temperature detecting device 200. Furthermore, since the temperature detecting device 200 is placed in the dead space, the rotating body device 100 can easily assemble the temperature detecting device 200. Furthermore, the rotating body device 100 can easily assemble the power module unit 40, the capacitor unit 50, the bus bars 81a, 81b, and the like that are placed around the temperature detecting device 200.

[0120] Furthermore, a portion of the wiring portion 202 is provided in a direction perpendicular to the current-carrying direction of the bus bars 81a and 81b. That is, a portion of the wiring portion 202 is provided along the Y direction. This allows the temperature detecting device 200 to reduce noise in the wiring portion 202. Note that the wiring portion 202 may be extended to the outside of the circuit board 1 and connected to the circuit board 1, for example. However, the wiring portion 202 may be extended in the Z direction relative to the detecting portion 201 and connected to the circuit board 1.

[0121] 9 and 10 , the temperature detection device 200 is disposed on a sensor mounting portion 66. The sensor mounting portion 66 is a part of the base 61. The base 61 is provided with the sensor mounting portion 66 that protrudes toward the capacitor portion 50 side with respect to the mounting portion 64. In other words, the sensor mounting portion 66 is provided between the mounting portion 64 and the capacitor portion 50.

[0122] The temperature detection device 200 detects the temperature of the refrigerant flowing through the inflow passage 92a mainly by heat transfer from the refrigerant in the inflow passage 92a via the sensor attachment portion 66. For this reason, the sensor attachment portion 66 is preferably made primarily of metal, which has a higher thermal conductivity than resin or the like.

[0123] More specifically, the temperature detecting device 200 is attached to the uppermost part of the sensor attachment part 66 (FIG. 10). The uppermost part is a surface along the XY plane and is the attachment surface of the temperature detecting device 200. The uppermost part is the part on the side of the bus bars 81a, 81b and the circuit board 1. The attachment surface is located closer to the drive shaft 70 than the power module part 40 in the Z direction. Therefore, it can be said that the base 61 has a step between the mounting part 64 and the sensor attachment part 66.

[0124] The mounting surface is provided at a position facing the inflow path 92a in the X direction. In other words, the mounting surface is provided at a position closer to the inflow path 92a in the Z direction than the module cooling path 92c. As a result, the temperature detecting device 200 is provided at a position facing the inflow path 92a in the X direction. Furthermore, the temperature detecting device 200 is disposed at a position closer to the inflow path 92a than the module cooling path 92c. Therefore, the temperature detecting device 200 can more easily detect the temperature of the refrigerant flowing through the inflow path 92a than the refrigerant flowing through the module cooling path 92c.

[0125] However, the mounting surface does not have to be located at a position facing the inflow passage 92a in the X direction. The mounting surface only needs to be located at a position closer to the inflow passage 92a in the Z direction than the module cooling passage 92c. Therefore, the mounting surface may be located closer to the drive shaft 70 than the facing area of ​​the inflow passage 92a in the X direction, or closer to the bus bars 81a, 81b than the facing area. The position of the facing surface can also be considered as the position of the detection unit 201.

[0126] The base 61 may also be provided with a sensor mounting portion 66 whose part in the Z direction protrudes in the X direction. That is, the base 61 may have a gap in the Z direction between the sensor mounting portion 66 and the portion of the base 61 where the capacitor unit 50 is mounted.

[0127] 9, the temperature detecting device 200 is preferably disposed between the center of the power module unit 40 and the outflow path 92e in the Y direction. In a plan view, the space between the center of the power module unit 40 and the outflow path 92e is between the outflow path 92e and a virtual line that passes through the center of the power module unit 40 and extends in the X direction. The center of the power module unit 40 is located on, for example, the center line CL2. In this case, the temperature detecting device 200 is disposed between the center line CL2 and the outflow path 92e in the Y direction.

[0128] Therefore, the temperature detection device 200 is less affected by the external temperature of the rotating body device 100 and the motor temperature of the motor section 30. Therefore, the temperature detection device 200 can easily output an electrical signal corresponding to the refrigerant temperature before heat exchange without being affected by the external temperature or the motor temperature. This allows the temperature detection device 200 to improve its detection accuracy. The external temperature refers to the temperature of the environment in which the rotating body device 100 is placed and the temperature around the base 61.

[0129] 9 and 10, the temperature detecting device 200 is fastened to the sensor mounting portion 66 with a bolt 300. In other words, the temperature detecting device 200 is screwed and fixed with the bolt 300. Therefore, the rotating body device 100 can be provided with the temperature detecting device 200 at low cost.

[0130] The bolt 300 is mainly made of metal and includes a bolt head 301 and a threaded portion 302. The bolt head 301 presses the temperature detecting device 200 against the sensor mounting portion 66.

[0131] The threaded portion 302 protrudes in the Z direction relative to the threaded portion 302. The threaded portion 302 is provided with a male thread. The threaded portion 302 is screwed into a female thread provided in the sensor attachment portion 66. The threaded portion 302 is preferably provided so as to reach a region facing the inflow channel 92a in the X direction (FIG. 10). The threaded portion 302 is disposed in a position closer to the inflow channel 92a than any other portion of the refrigerant flow path other than the inflow channel 92a. In addition, a part of the sensor attachment portion 66, which is mainly composed of a metal with high thermal conductivity, is disposed between the threaded portion 302 and the inflow channel 92a.

[0132] In this way, the temperature detecting device 200 is fixed with a portion of the bolt 300 positioned in a region facing the inflow channel 92a in the X direction. Therefore, the temperature detecting device 200 detects the temperature of the refrigerant flowing through the inflow channel 92a mainly by heat transfer from the refrigerant in the inflow channel 92a via the sensor mounting portion 66 and the bolt 300. For this reason, it is preferable that the bolt 300 be made of a metal with high thermal conductivity.

[0133] In this case, temperature detecting device 200 can easily detect the refrigerant temperature before heat exchange via bolt 300. Therefore, rotating body device 100 can suppress the influence of the refrigerant temperature after heat exchange, and the detection accuracy of temperature detecting device 200 can be further improved.

[0134] As described above, the threaded portion 302 of the bolt 300 can be disposed in a region facing the inflow passage 92a in the X direction. Therefore, even if the temperature detecting device 200 has a mounting surface located above the inflow passage 92a in the Z direction, heat is transferred from the refrigerant in the inflow passage 92a via the bolt 300. Therefore, the temperature detecting device 200 can suppress a decrease in detection accuracy.

[0135] However, the fixing structure of the temperature detecting device 200 is not limited to screwing with the bolt 300. For example, the temperature detecting device 200 may include a threaded portion provided with a male thread in addition to the detecting unit 201 and the wiring unit 202. The detecting unit 201 is provided on the threaded portion. The temperature detecting device 200 may then be fixed by screwing the threaded portion into the female thread of the sensor mounting unit 66. In this case, the detecting unit 201 is disposed inside the sensor mounting unit 66. Therefore, the detecting unit 201 is less susceptible to the influence of external temperatures. This allows the temperature detecting device 200 to further improve its detection accuracy.

[0136] Furthermore, the temperature detecting device 200 may be fixed to the sensor mounting portion 66 by a spring member. The temperature detecting device 200 may be fixed to the sensor mounting portion 66 by an adhesive. The temperature detecting device 200 may be fixed to the sensor mounting portion 66 by press-fitting into a hole provided in the sensor mounting portion 66.

[0137] The portion of the base 61 between the inlet channel 92a and a part of the bolt may be made of a metal having a higher thermal conductivity than the surrounding area. In other words, the base 61 may be made of a plurality of members.

[0138] Furthermore, as shown in FIGS. 12 and 13 , the rotating body device 100 may have a different positional relationship in the X direction between the discharge hole 92d and the supply hole 92b. In this case, the temperature detecting device 200 is disposed on the opposite side of the capacitor unit 50 in the X direction. That is, the rotating body device 100 may be arranged in the following order in the X direction: temperature detecting device 200, inflow path 92a, and capacitor unit 50. This allows the rotating body device 100 to have a wider gap between the temperature detecting device 200 and the capacitor unit 50. As a result, the temperature detecting device 200 is less affected by the temperature of the capacitor unit 50. Therefore, the rotating body device 100 can further improve the detection accuracy of the temperature detecting device 200.

[0139] Although the present disclosure has been described with reference to the embodiments, it is understood that the present disclosure is not limited to the embodiments or structures. The present disclosure also encompasses various modifications and modifications within the scope of equivalents. In addition, although various combinations and forms are shown in the present disclosure, other combinations and forms including only one element, more, or less than one element are also within the scope and spirit of the present disclosure.

[0140] (Disclosure of technical ideas) This specification discloses multiple technical ideas described in the following multiple clauses. Some clauses may be written in a multiple dependent form, with the subsequent clause referring to the preceding clause as an alternative. Furthermore, some clauses may be written in a multiple dependent form, referring to another multiple dependent clause. These multiple dependent clauses define multiple technical ideas.

[0141] (Technical thought 1) a motor unit (30); a capacitor section (50) that is part of a drive circuit that drives the motor section to rotate, that is disposed radially of the motor section and is smaller than the motor section; a power module section (40) that is part of the drive circuit and is arranged on the motor section's axial side relative to the motor section and the capacitor section; a module refrigerant passage (92a to 92e) through which a refrigerant flows, which is a portion that mainly cools the power module portion; a condenser refrigerant passage (93, 94) through which the refrigerant flows, the condenser refrigerant passage (93, 94) being a portion that mainly cools the condenser portion, The module refrigerant path is a module facing portion (92c) disposed opposite the power module portion; two holes (92b, 92d) for supplying and discharging the refrigerant to the module facing portion; a connecting passage (92e) connecting the module facing portion and the condenser refrigerant passage, A rotating body device in which the connecting path, a portion of the condenser refrigerant path, and a first hole portion, which is one of the two hole portions, are arranged on the condenser portion side rather than the motor portion side in the radial direction with respect to the center of the module opposing portion.

[0142] (Technical thought 2) A rotating body device described in Technical Idea 1, in which the second hole portion, which is the other of the two hole portions, is located on the motor portion side of the capacitor portion in the radial direction, with the center of the module opposing portion as the reference.

[0143] (Technical Thought 3) the first hole and the second hole are provided at positions facing the power module, The rotating body device according to Technical Concept 2, wherein the refrigerant flows between the first hole portion and the second hole portion in the module opposing portion.

[0144] (Technical Thought 4) a drive shaft (70) that rotates in accordance with the rotation of the motor shaft of the motor unit and is provided along the motor shaft direction; The rotating body device according to Technical Idea 2 or 3, wherein the capacitor portion is disposed opposite the drive shaft in a direction perpendicular to the motor axial direction and the radial direction.

[0145] (Technical Thought 5) the power module unit is disposed opposite the drive shaft in the orthogonal direction, In the orthogonal direction, the distance between the power module unit and the drive shaft is wider than the distance between the capacitor unit and the drive shaft, The rotating body device according to Technical Idea 4, wherein the connecting passage and the condenser refrigerant passage are arranged closer to the drive shaft than the condenser unit in the perpendicular direction.

[0146] (Technical Thought 6) the module refrigerant passage includes an external connection passage (92a) that communicates with the outside and the second hole portion, The rotating body device according to Technical Concept 4 or 5, wherein the external connection path is provided in an area facing the power module unit in the orthogonal direction.

[0147] (Technical Thought 7) The rotating body device according to Technical Idea 6, wherein the external connection passage is positioned at a different position in the orthogonal direction from the connection passage and the condenser refrigerant passage.

[0148] (Technical Thought 8) The rotating body device according to Technical Concept 6, further comprising a temperature detection device (200) arranged on the motor shaft side relative to the external connection path.

[0149] (Technical Thought 9) The temperature detection device is fastened with a bolt (300) to a metal member (61) in which the module refrigerant path is formed. The rotating body device according to Technical Idea 8, wherein a portion of the bolt is arranged in an area facing the external connection path in the motor axial direction.

[0150] (Technical Thought 10) A rotating body device according to Technical Idea 9, wherein the portion of the metal member between the part of the bolt and the external connection passage is made of a metal having a higher thermal conductivity than the surrounding area.

[0151] (Technical Thought 11) A rotating body device according to any one of Technical Ideas 8 to 10, in which a discharge hole (92d), which is one of the hole portions, the external connection path, the temperature detection device, and the capacitor portion are arranged in this order in the motor axial direction.

[0152] (Technical Thought 12) bus bars (81a, 81b) electrically connecting the capacitor section and the power module section; The rotating body device according to Technical Idea 9, wherein the temperature detection device is disposed between the bus bar and the metal member.

[0153] (Technical Thought 13) 13. The rotating body device according to any one of Technical Ideas 8 to 12, wherein the temperature detection device is disposed between the center of the power module unit and the connecting path in the radial direction. [Explanation of symbols]

[0154] 1...circuit board, 10...first gear portion, 20...second gear portion, 30...motor portion, 31...motor shaft, 40...power module portion, 41...semiconductor device, 42...heat sink, 43...fin, 44...terminal, 50...capacitor portion, 51...capacitor element, 52...capacitor case, 53...fixing member, 60...housing, 61...base, 62...upper cover, 63...side cover, 64...mounting portion, 65...shaft hole, 70...drive shaft, 71...lubricating oil, 81...PN connector, 81a...P bus bar, 81b...N bus bar, 82...communication connector, 91...refrigerant port, 92a...inlet path, 92b...supply hole, 92c...module cooling path, 92d...discharge hole, 92e...outlet path, 93...first opposed cooling path, 94...second opposed cooling path, 95...motor cooling path, 96...heat dissipation member (heat shield), 97...extension path, 100...rotating body device

Claims

1. A motor unit (30); a capacitor section (50) that is part of a drive circuit that drives the motor section to rotate, that is arranged radially of the motor section and is smaller than the motor section; a power module section (40) that is part of the drive circuit and is arranged on the motor section's axial side relative to the motor section and the capacitor section; a module refrigerant passage (92a to 92e) through which a refrigerant flows, which is a portion that mainly cools the power module portion; a condenser refrigerant passage (93, 94) which is a portion that mainly cools the condenser portion and through which the refrigerant flows, The module refrigerant path is a module opposing portion (92c) disposed opposite the power module portion; two holes (92b, 92d) for supplying and discharging the coolant to and from the module facing portion; a connecting path (92e) connecting the module facing portion and the condenser refrigerant path, A rotating body device in which the connecting path, a portion of the condenser refrigerant path, and a first hole portion, which is one of the two hole portions, are arranged on the condenser portion side rather than the motor portion side in the radial direction with respect to the center of the module opposing portion.

2. 2. The rotating body device according to claim 1, wherein the second hole portion, which is the other of the two holes, is provided closer to the motor portion than the capacitor portion in the radial direction with respect to the center of the module opposing portion.

3. the first hole and the second hole are provided at positions facing the power module, The rotating body device according to claim 2 , wherein the refrigerant flows between the first hole and the second hole in the module facing portion.

4. a drive shaft (70) that rotates in accordance with the rotation of the motor shaft of the motor unit and is provided along the motor shaft direction; 4. The rotating body device according to claim 2, wherein the capacitor portion is disposed opposite the drive shaft in a direction perpendicular to the motor axial direction and the radial direction.

5. the power module unit is disposed opposite the drive shaft in the orthogonal direction, In the orthogonal direction, the distance between the power module unit and the drive shaft is wider than the distance between the capacitor unit and the drive shaft, 5. The rotating body device according to claim 4, wherein the connecting passage and the condenser refrigerant passage are disposed closer to the drive shaft than the condenser section in the orthogonal direction.

6. The module refrigerant passage includes an external connection passage (92a) that communicates with the outside and the second hole portion, The rotating body device according to claim 4 , wherein the external connection path is provided in an area facing the power module unit in the orthogonal direction.

7. 7. The rotating body device according to claim 6, wherein the external connection passage is located at a position different from that of the connection passage and the condenser refrigerant passage in the orthogonal direction.

8. 7. The rotating body device according to claim 6, further comprising a temperature detection device (200) arranged on the motor axial side with respect to the external connection path.

9. The temperature detection device is fastened with a bolt (300) to a metal member (61) in which the module refrigerant path is formed, 9. The rotating body device according to claim 8, wherein a portion of the bolt is disposed in an area facing the external connection passage in the motor axial direction.

10. 10. The rotating body device according to claim 9, wherein the portion of the metal member between the part of the bolt and the external connection passage is made of a metal having a higher thermal conductivity than the surrounding area.

11. 9. The rotating body device according to claim 8, wherein the discharge hole (92d), which is one of the holes, the external connection path, the temperature detection device, and the capacitor portion are arranged in this order in the motor axial direction.

12. bus bars (81a, 81b) electrically connecting the capacitor section and the power module section; The rotating body device according to claim 9 , wherein the temperature detection device is disposed between the bus bar and the metal member.

13. 9. The rotating body device according to claim 8, wherein the temperature detection device is disposed between the center of the power module unit and the connecting path in the radial direction.

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