Inverter device, motor, and vehicle

Abstract

Provided are an inverter device, a motor, and a vehicle that can efficiently cool a capacitor. An inverter device (20) has a capacitor module (14) having a capacitor (141), a flow path forming body (2) disposed adjacent to the capacitor module (14) and having a flow path (21) through which a refrigerant (Q) that cools the capacitor module (14) passes, and a frame body (3) that houses the capacitor module (14) and the flow path forming body (2). The capacitor module (14) has two main surfaces (S141, S142) that face each other and side surfaces (S143, S144) that connect the two main surfaces (S141, S142). The flow path forming body (2) has a first contact surface (S21) that contacts the main surface (S141), a second contact surface (S22) that contacts the side surface (S143), and a second contact surface (S23) that contacts the side surface (S144).

Description

Technical Field

[0001] This invention relates to inverter devices, motors, and vehicles. Background Technology

[0002] Inverter devices used in vehicles include, for example, inverters installed in electric vehicles (EVs) and inverters installed in hybrid vehicles. In the case of an inverter installed in an EV, the inverter generates heat due to the large current when energized. Furthermore, in the case of an inverter installed in a hybrid vehicle, heat generated by the engine is transferred to the inverter, causing it to heat up. Moreover, in both cases, cooling of the inverter, especially the capacitors built into the inverter, is required.

[0003] For example, in the device described in Patent Document 1, the capacitor is cooled by the cooling medium when the flow path forming body 12 through which the cooling medium passes is close to the upper surface of the capacitor covered by the filling material.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent No. 5978324

[0007] However, in a structure where only one side of the capacitor is in contact with the cooling medium or flow path forming body, there is a possibility that the cooling medium may not provide sufficient cooling for the capacitor. Summary of the Invention

[0008] The purpose of this invention is to provide an inverter device capable of efficiently cooling capacitors, a motor equipped with the inverter device, and a vehicle equipped with the motor.

[0009] An exemplary invention of this application is an inverter device, characterized by comprising: a capacitor module having a capacitor for smoothing voltage from a power source; a flow path forming body disposed adjacent to the capacitor module and having a flow path through which a refrigerant for cooling the capacitor module can pass; and a frame housing the capacitor module and the flow path forming body, the capacitor module having two opposing main surfaces and a side surface connecting the two main surfaces, the flow path forming body having a first contact surface contacting one of the main surfaces and a second contact surface contacting the side surface.

[0010] In addition, another exemplary invention of this application is a motor, characterized in that it is equipped with the above-mentioned inverter device.

[0011] In addition, another exemplary invention of this application is a vehicle, characterized in that it is equipped with the aforementioned motor.

[0012] According to the exemplary invention of this application, it is possible to provide an inverter device capable of efficiently cooling capacitors, a motor equipped with the inverter device, and a vehicle equipped with the motor. Attached Figure Description

[0013] Figure 1 This is a schematic structural diagram of a vehicle equipped with the inverter device (motor) of the present invention.

[0014] Figure 2 yes Figure 1 The vertical cross-sectional view of the inverter device shown.

[0015] Figure 3 It is shown Figure 1 A vertical cross-sectional view of the inverter unit during its assembly process.

[0016] Figure 4 It shows that Figure 1 A vertical cross-sectional view of the inverter unit after the small cover component has been removed.

[0017] Figure 5 yes Figure 2 Sectional view along line AA in the diagram. Detailed Implementation

[0018] The inverter device, motor, and vehicle of the present invention will now be described in detail based on the preferred embodiments shown in the accompanying drawings.

[0019] Additionally, for ease of explanation, the three mutually orthogonal axes will be designated as the X-axis, Y-axis, and Z-axis. As an example, the XY plane, which includes the X and Y axes, is horizontal, and the Z-axis is vertical. Furthermore, sometimes... Figures 2-5 The upper side is referred to as "upper" or "above", and the lower side is referred to as "lower" or "below". In addition, in this specification, the vertical direction, horizontal direction, upper side and lower side are just names used to describe the relative positional relationship of each part. The actual configuration relationship may be other than the configuration relationship indicated by these names.

[0020] exist Figure 1 In this vehicle 100, the motor (electric motor) 15, for example, is a three-phase AC motor and serves as the driving force source. The rotating shaft of the motor 15 is connected to the reducer 60 and the differential gear 70. Thus, the driving force (torque) of the motor 15 is transmitted to a pair of wheels 50a and 50b via the reducer 60, the differential gear 70, and the driving shaft 80.

[0021] The inverter unit (inverter section) 20 of the inverter control device 10 is installed on the motor 15 for use. The inverter unit 20 includes: a power module unit 13 that provides drive power to the motor 15; a power module drive circuit (drive circuit) 12 that outputs a drive signal to the power module unit 13 to drive the motor 15; an inverter control circuit (control circuit) 11 that outputs a control signal to the power module drive circuit 12; and a capacitor module 14 that smooths the voltage from the battery (external power supply) BT.

[0022] The inverter unit 20 is controlled by control signals from the control unit 30, which manages the overall control of the vehicle 100, and drives the motor 15. That is, the inverter unit 20 can convert the power from the battery BT (from DC to AC) and supply it to the motor 15. The control unit 30 is, for example, a vehicle control unit (VCU).

[0023] In addition, the inverter device 20 can also convert the back electromotive force generated by the rotation of the motor 15 (from AC to DC) and supply it to the battery BT.

[0024] Furthermore, the inverter device 20 can be installed in any vehicle, such as a hybrid vehicle or an electric vehicle, that has a motor 15.

[0025] The power module unit 13 has a bridge circuit (power conversion circuit) consisting of six power switching elements connected in total, with each of the U-phase, V-phase, and W-phase connected to two power switching elements (power switching elements of the upper bridge arm and the lower bridge arm).

[0026] In addition, power switching components include IGBT (Insulated Gate Bipolar Transistor), MOSFET (Metal Oxide Semiconductor Field Effect Transistor), and SiC (Silicon Carbide) semiconductors.

[0027] The power module unit 13 switches the power switching elements on / off according to the drive signal (PWM control signal) from the power module drive circuit 12. Thus, the power module unit 13 converts the DC power supplied from the battery BT via the capacitor module 14 into AC power (three-phase AC power), which is then supplied to the motor 15 to drive the motor 15.

[0028] The battery BT is the source of electrical energy that powers the vehicle 100, and is composed of, for example, multiple secondary batteries.

[0029] In the inverter device 20, a capacitor module 14 is arranged at the connection point with the battery BT. The capacitor module 14 is connected between the high potential line (positive potential B+) and the low potential line (negative potential B- (GND)). This capacitor module 14 has the function of smoothing the input voltage from the battery BT and has a large capacity capacitor 141.

[0030] Here, refer to Figures 2-5 The structure of the inverter device 20 is described in detail.

[0031] like Figures 2-4 As shown, the inverter device 20 includes a circuit board 17, a power module unit 13, a flow path forming body 2, and a capacitor module 14 arranged sequentially from top to bottom. Therefore, in this embodiment, the circuit board 17, the power module unit 13, the flow path forming body 2, and the capacitor module 14 are arranged in the same direction as the Z-axis. This, compared to, for example, setting the arrangement direction of the circuit board 17, the power module unit 13, the flow path forming body 2, and the capacitor module 14 to the X-axis direction, can suppress the entire length of the inverter device 20 in the X-axis direction, contributing to the miniaturization of the inverter device 20.

[0032] In addition, the inverter device 20 includes: a frame 3 that houses the circuit board 17, power module unit 13, flow path forming body and capacitor module 14; and a cover member 5 fixed to the frame 3.

[0033] Moreover, such as Figure 5 As shown, the inverter device 20 includes: a power supply unit 40 that supplies power from a battery BT (not shown) to a power module unit 13; and a positive bus 90A and a negative bus 90B that connect the power module unit 13 and a capacitor 141.

[0034] The capacitor module 14 has a capacitor 141, a capacitor housing 4 for housing the capacitor 141, and a resin sealing material 142 filled inside the capacitor housing 4.

[0035] The capacitor housing 4 is composed of a box-shaped component. When viewed from the Y-axis direction, the capacitor housing 4 has main surfaces S141 and S142 facing each other in the Z-axis direction, and side surfaces S143 and S144 facing each other in the X-axis direction on its outer surface. Side surface S143 connects to main surfaces S141 and S142, and side surface S144 connects to main surfaces S141 and S142 on the side opposite to side surface S143.

[0036] Main surfaces S141 and S142 are planes parallel to the XY plane, and side surfaces S143 and S144 are planes parallel to the YZ plane. Therefore, the capacitor housing 4 is a rectangle in which main surface S141 is orthogonal to side surfaces S143 and S144, and main surface S142 is orthogonal to side surfaces S143 and S144. Thus, the outer shape of the capacitor housing 4 can be made into a simple shape that is easy to form. Furthermore, through this forming process, main surfaces S141, S142, side surfaces S143, and S144 can be easily formed into smooth planes.

[0037] like Figure 5 As shown, the capacitor housing 4 has an opening 41 in the Y-axis direction. The opening 41 is surrounded by a main surface S141, a main surface S142, a side surface S143, and a side surface S144. The capacitor 141 can be housed in the capacitor housing 4 through the opening 41. Furthermore, the side of the capacitor housing 4 opposite to the opening 41 is closed by a side surface (bottom surface).

[0038] Capacitor 141 is a film capacitor that smooths the voltage from battery BT. For example... Figure 2 As shown, in this embodiment, four capacitors 141 are housed in the capacitor housing 4. Two of the four capacitors 141 are arranged in the Z-axis direction and two are arranged in the X-axis direction (hereinafter referred to as the "2×2 configuration").

[0039] Compared to, for example, arranging four capacitors 141 in a row along the X-axis, the 2×2 configuration facilitates miniaturization of the inverter device 20 when viewed from the Z-axis, and the capacitor module 14 can more fully enclose the area surrounded by the flow path forming body 2 (described later). Furthermore, by ensuring a larger area surrounded by the flow path forming body 2, the capacitors 141 can be rapidly cooled using the flow path forming body 2.

[0040] In addition, the number of capacitors 141 configured in this embodiment is four, but it is not limited to this; for example, it can also be one, two, three, or more than five.

[0041] In addition, the configuration of the four capacitors 141 is not limited to a 2×2 configuration.

[0042] A resin sealant 142 is filled inside the capacitor housing 4. The resin sealant 142 is, for example, epoxy resin, which fixes and seals the capacitors 141. This restricts the position of each capacitor 141 inside the capacitor housing 4 and prevents moisture (water vapor) from entering the capacitors 141.

[0043] In addition, such as Figure 5As shown, the resin sealing material 142 is exposed from the opening 41. The positive bus 90A and the negative bus 90B can pass through the opening 41. Furthermore, the resin sealing material 142 can be used to fix the positive bus 90A and the negative bus 90B. Therefore, the connection between the power module unit 13 and the capacitor 141 via the positive bus 90A and the negative bus 90B is stable.

[0044] like Figure 2 As shown, a flow path forming body 2 is disposed adjacent to the upper side of the capacitor module 14. The flow path forming body 2 is composed of a curved, elongated plate-like component. The flow path forming body 2 has a flow path 21 formed along its length. The refrigerant Q for cooling the capacitor module 14 can pass through the flow path 21.

[0045] The flow path 21 has a first portion 211, a second portion 212, and a third portion 213 sequentially from the upstream side. The first portion 211 is formed by a through hole extending along the Z-axis direction. The second portion 212 is formed by a groove extending along the X-axis direction. The third portion 213 is formed by a through hole extending along the Z-axis direction. In addition, the first portion 211 and the third portion 213 are connected via the second portion 212.

[0046] As a refrigerant Q, LLC (Long Life Coolant) such as aqueous ethylene glycol solution is preferred, but it is not limited to this.

[0047] The flow path forming body 2 has the following on its lower (inner) side: a first contact surface S21 that is in overall contact with the main surface S141 of the capacitor module 14 (capacitor housing 4); a second contact surface S22 that is in contact with a portion of the main surface S141 side of the side S143; and a second contact surface S23 that is in contact with a portion of the main surface S141 side of the side S144.

[0048] Furthermore, in the flow path forming body 2, the first contact surface S21 and the second portion 212 are parallel to each other and as close as possible. Similarly, the second contact surface S22 and the first portion 211 are also parallel to each other and as close as possible. In addition, the second contact surface S23 and the third portion 213 are also parallel to each other and as close as possible.

[0049] As described above, in the inverter device 20, the flow path forming body 2 and the capacitor module 14 are in contact with each other on multiple (three in this embodiment) surfaces. Therefore, when the refrigerant Q passes through the flow path 21 of the flow path forming body 2, the refrigerant Q can quickly capture (absorb) the heat from each capacitor 141. Thus, the inverter device 20 can effectively cool each capacitor 141, exhibiting excellent cooling performance.

[0050] Furthermore, as described above, the motor 15 is equipped with an inverter device 20. Therefore, the motor 15 is equipped with an inverter device 20 with excellent cooling performance, thus enabling high durability and long lifespan when providing high current.

[0051] In addition, the vehicle 100 is equipped with a motor 15 that achieves high durability and long lifespan under high current, thus enabling it to drive and stop smoothly and quickly for extended periods.

[0052] In the capacitor module 14, the capacitor housing 4, as a molded body, is easier to form a smooth surface than the resin sealing material 142. This allows the main surface S141, side surface S143, and side surface S144 of the capacitor housing 4 to be smooth surfaces, ensuring close contact with the flow path forming body 2. Furthermore, by increasing the degree of contact, the cooling efficiency of the capacitor module 14 is improved. Moreover, the degree of contact between the flow path forming body 2 and the capacitor housing 4 can be further improved by applying (coating) heat-dissipating grease or a compound between them.

[0053] On the upper side of the flow path forming body 2 (the side opposite to the capacitor module 14), a power module unit 13 that provides drive current to the motor 15 is disposed adjacent to it.

[0054] The power module unit 13 covers the second part 212 of the flow path 21. Therefore, when the refrigerant Q passes through the second part 212 (flow path 21), the refrigerant Q comes into contact with the power module unit 13, directly cooling the power module unit 13. This allows for rapid cooling of the power module unit 13.

[0055] Furthermore, by utilizing the refrigerant Q passing through the flow path forming body 2, both the capacitor module 14 and the power module unit 13 can be cooled simultaneously. Therefore, the structure for cooling the capacitor module 14, which is separate from the flow path forming body 2, can be omitted, thus reducing the number of components in the inverter device 20.

[0056] In addition, a gasket 16 is disposed between the power module unit 13 and the flow path forming body 2. This prevents refrigerant Q from leaking out between the power module unit 13 and the flow path forming body 2.

[0057] like Figure 2 As shown, the flow path forming body 2 has: a capacitor fastening part 23 fastened to the capacitor module 14 by a screw 91; and a power module fastening part 24 fastened to the power module unit 13 by a screw 92. The capacitor fastening part 23 and the power module fastening part 24 are respectively made of female threads.

[0058] When securing the capacitor module 14 to the flow path forming body 2, with the capacitor module 14 positioned on the lower (inner) side of the flow path forming body 2, screws 91 are screwed into the capacitor fastening portion 23 from the capacitor module 14 side. At this time, the screws 91 pass through the through hole 42 of the capacitor housing 4 provided in the capacitor module 14. Thus, the capacitor module 14 is secured to the flow path forming body 2.

[0059] When securing the power module unit 13 to the flow path forming body 2, with the power module unit 13 positioned on the upper (surface) side of the flow path forming body 2, screws 92 are screwed into the capacitor fastening portion 23 from the power module unit 13 side. Furthermore, at this time, the screws 92 pass through the through hole 131 provided on the power module unit 13. Thus, the power module unit 13 is secured to the flow path forming body 2.

[0060] With the above-described fastening, the flow path forming body 2, capacitor module 14, and power module unit 13 become an assembly 1 pre-assembled by threaded fastening before being housed in the frame 3.

[0061] And, as Figure 3 As shown, the assembly 1 can be directly housed in the housing 3. Therefore, compared to the case where the capacitor module 14, flow path forming body 2, and power module unit 13 are housed in the housing 3 in this order, the housing operation in the housing 3 can be performed quickly. This improves the ease of assembly of the inverter device 20.

[0062] Furthermore, in this embodiment, four capacitor fasteners 23 are provided. With four capacitor fasteners 23, two are arranged in the X-axis direction and two in the Y-axis direction. Thus, the capacitor module 14 is stably and securely fastened to the flow path forming body 2.

[0063] Furthermore, in this embodiment, four power module fasteners 24 are provided. With four power module fasteners 24, two are arranged in the X-axis direction and two in the Y-axis direction. Thus, the power module unit 13 is stably and securely fastened to the flow path forming body 2.

[0064] However, the number of capacitor fasteners 23 and power module fasteners 24 is not limited to four each; any number is acceptable as long as they can be stably fixed.

[0065] A circuit board 17 is disposed and fixed on the upper side of the power module unit 13. The circuit board 17 is a single board on which the inverter control circuit 11 and the power module drive circuit 12 are mounted. The inverter control circuit 11 is a circuit that outputs control signals to the power module drive circuit 12. The power module drive circuit 12 is a circuit that outputs drive signals to the power module unit 13, which provides drive current to the motor 15.

[0066] By concentrating the inverter control circuit 11 and the power module drive circuit 12 on a single substrate, the number of components constituting the inverter device 20 can be reduced. This allows for, for example, a reduction in the assembly time of the inverter device 20 and miniaturization of the inverter device 20.

[0067] In addition, the circuit board 17 is fixed on the power module unit 13 and is therefore included in the assembly 1.

[0068] As described above, assembly 1 is housed within frame 3. Figure 2 As shown, the frame 3 is composed of a box-shaped component having a bottom 33 and sidewalls 34.

[0069] In addition, the frame 3 has an inflow section 31 connected to the first portion 211 (upstream side) of the flow path 21 of the flow path forming body 2; and an outflow section 32 connected to the third portion 213 (downstream side) of the flow path 21 of the flow path forming body 2. The inflow section 31 and the outflow section 32 are provided as blocks of the same height on the bottom 33, and also function as a support platform for supporting the flow path forming body 2 (assembly 1).

[0070] The inlet portion 31 has a flow path 311 extending from the side wall portion 34 to the first portion 211 of the flow path 21 of the flow path forming body 2. The flow path 311 is formed by a through hole, through which the refrigerant Q can pass. Thus, the refrigerant Q can flow into the flow path 21.

[0071] The outlet 32 ​​has a flow path 321 extending from the third portion 213 of the flow path 21 of the flow path forming body 2 to the bottom 33. The flow path 321 is formed by a through hole, through which the refrigerant Q can pass. Thus, the refrigerant Q can flow out from the flow path 21.

[0072] Furthermore, a capacitor module 14 is disposed between the inflow section 31 and the outflow section 32. The inflow section 31 contacts the side surface S143 of the capacitor module 14, and the outflow section 32 contacts the side surface S144 of the capacitor module 14. This increases the contact area (contact area) between the capacitor module 14 and the components through which the refrigerant Q passes, in addition to the flow path forming body 2. This further improves the cooling efficiency of the capacitor module 14.

[0073] The inverter device 20 includes: a first pipe 18 connected to the inlet section 31; and a second pipe 19 connected to the outlet section 32.

[0074] The first piping 18 is a tubular component that allows refrigerant Q to flow into the flow path 21 via the inlet 31, for example having a straight section, a bend, or a curve.

[0075] The second piping 19 is a tubular component that allows refrigerant Q to flow out of the flow path 21 via the outlet 32. Like the first piping 18, it may have, for example, a straight section, a bent or curved section.

[0076] The first conduit 18 and the second conduit 19 of this shape lead to the motor housing 151 (see reference) where the motor 15 is housed. Figure 1 The piping extends to the side. This shortens the piping paths of the first piping 18 and the second piping 19, which helps to quickly cool the capacitor module 14.

[0077] In addition, the flow path forming body 2 has a frame fastening part 22 that is fastened to the inflow part 31 and the outflow part 32 of the frame body 3 by screws 93. The frame fastening part 22 has a through hole 221 through which the screw 93 passes along the Z-axis direction (the normal direction of the main surface S141).

[0078] On the other hand, female threads 35 are provided on the inflow portion 31 and the outflow portion 32 respectively.

[0079] When fastening the flow path forming body 2 to the frame 3, with the flow path forming body 2 placed on the inlet portion 31 and the outlet portion 32, screw 93 is screwed into the female thread 35 from above. At this time, screw 93 passes through the through hole 221 of the frame fastening portion 22. Thus, the flow path forming body 2 is fastened to the frame 3.

[0080] Furthermore, the number of frame fasteners 22 is preferably at least four. When the number of frame fasteners 22 is four, two are arranged in the X-axis direction and two in the Y-axis direction. Thus, the flow path forming body 2 is stably and securely fastened to the frame 3.

[0081] In addition, the screws 93 in the through holes 221 of the four frame fasteners 22 are in the same direction. As a result, the workability is improved when the flow path forming body 2 is threadedly fastened to the frame 3.

[0082] The cover component 5 is fixed to the frame 3 by a plurality of screws 94. This can block the opening 36 on the upper side of the frame 3, for example, protecting the assembly 1 inside the frame 3.

[0083] Furthermore, it is preferable that there are at least four fixing points based on the screw 94. When there are four fixing points, two screws 94 are arranged in the X-axis direction and two are arranged in the Y-axis direction.

[0084] The cover component 5 has a plate-shaped cover body 51 and a plate-shaped small cover component 52.

[0085] The main body 51 has a through window 511.

[0086] The small cover component 52 is detachably mounted to the window portion 511 of the cover body 51 by screws 95. Thus, the window portion 511 can be in a closed state covered by the small cover component 52 (see reference). Figure 2 , Figure 3 ) and the open state of the small cover component 52 (refer to Figure 4 Therefore, even with the cover component 5 (cover body 51) fixed to the frame 3, by simply removing the small cover component 52 from the cover body 51, it is possible to perform operations such as connecting the capacitor module 14 inside the frame 3 and replacing the cables of the terminal block 6, thus improving work efficiency. The terminal block 6 supports the busbar (a curved strip plate component with a power supply section 40) that supplies power from the battery BT to components of the inverter device 20 (such as the power module unit 13).

[0087] As described above, the inverter device 20 includes a power supply unit 40, a positive bus 90A, and a negative bus 90B.

[0088] The power supply unit 40 is the part that supplies power from the battery BT to the power module unit 13, and is, for example, composed of the upper end (end) of a curved strip plate component.

[0089] The positive busbar 90A and the negative busbar 90B are the buses that connect the power module unit 13 and the capacitor 141, respectively, and are, for example, composed of a curved strip plate component.

[0090] like Figure 5 As shown, the power supply unit 40 is adjacent to the circuit board 17 and is disposed on the same plane as the circuit board 17. Therefore, for example, compared to the case where the power supply unit 40 is located above the circuit board 17, the height of the inverter device 20 can be suppressed, which helps to miniaturize the inverter device 20.

[0091] Positive bus 90A and negative bus 90B are configured to span between power module unit 13 and capacitor 141. Furthermore, when viewed from the X-axis direction (the normal direction of side surfaces S143 and S144), a portion of positive bus 90A and negative bus 90B are configured to overlap. This reduces the equivalent series inductance (ESL).

[0092] The inverter device, motor, and vehicle of the present invention have been described above with reference to the illustrated embodiments. However, the present invention is not limited thereto, and the various parts constituting the inverter device, motor, and vehicle can be replaced with components of any structure capable of performing the same function. In addition, any additional components may be added.

[0093] 1 Assembly

[0094] 2 Flow path forming body

[0095] 21 flow path

[0096] 211 Part 1

[0097] 212 Part Two

[0098] 213 Part Three

[0099] 22. Frame fastening parts

[0100] 221 Through hole

[0101] 23 Capacitor fastening part

[0102] 24 Power module fastening parts

[0103] 3. Frame

[0104] 31. Inflow section

[0105] 311 flow path

[0106] 32 Outflow part

[0107] 321 flow path

[0108] 33 Bottom

[0109] 34 Side wall portion

[0110] 35 Female thread

[0111] 36 Opening

[0112] 4. Capacitor casing

[0113] 41 Opening

[0114] 42 Through holes

[0115] 5. Cover components

[0116] 51. Cover body

[0117] 511 Window

[0118] 52 Small cover components

[0119] 6-terminal block

[0120] 91 screws

[0121] 92 screws

[0122] 93 screws

[0123] 94 screws

[0124] 95 screws

[0125] 10 Inverter Control Unit

[0126] 11. Inverter control circuit (control circuit)

[0127] 12 Power Module Drive Circuit (Drive Circuit)

[0128] 13 Power Module Unit

[0129] 131 Through hole

[0130] 14 Capacitor Module

[0131] 141 Capacitor

[0132] 142 Resin Sealing Material

[0133] 15. Motor (Electric Motor)

[0134] 151 Motor housing

[0135] 16 Padding

[0136] 17 Circuit board

[0137] 18 First Pipeline

[0138] 19 Second Piping

[0139] 20. Inverter Unit (Inverter Section)

[0140] 30 Control Department

[0141] 40 Power Supply Department

[0142] 50a and 50b wheels

[0143] 60 reducer

[0144] 70 Differential Gear

[0145] 80. Driving shaft

[0146] 90A Positive Busbar

[0147] 90B Negative Busbar

[0148] 100 vehicles

[0149] BT battery (external power source)

[0150] S141, S142 Main face

[0151] S143, S144 Side View

[0152] S21 First Contact Surface

[0153] S22, S23 Second contact surfaces

[0154] Q. Refrigerant.

Claims

1. An inverter device, characterized in that, have: A capacitor module having a capacitor that smooths the voltage from a power source; A flow path forming body is disposed adjacent to the capacitor module and has a flow path through which a refrigerant for cooling the capacitor module can pass. as well as The frame houses the capacitor module and the flow path forming body. The capacitor module has two main surfaces that are opposite each other and a side surface that connects the two main surfaces. The flow path forming body has a first contact surface that contacts one of the main surfaces and a second contact surface that contacts the side surface. Also includes: A power module unit that provides drive current to the motor; A single circuit board, the circuit board being equipped with a drive circuit that outputs drive signals to the power module unit and a control circuit that outputs control signals to the drive circuit; as well as The power supply unit supplies power to the power module unit from an external power source. The circuit board, the power module unit, the flow path forming body, and the capacitor module are arranged in this order. The power supply unit and the circuit board are arranged on the same plane.

2. The inverter device according to claim 1, characterized in that, The capacitor module and the flow path forming body are configured as an assembly assembled by threaded fastening. The flow path forming body has a frame fastening part that is fastened to the frame body by screws.

3. The inverter device according to claim 2, characterized in that, The flow path forming body contacts the entire main surface of the one side and a portion of the side surface closest to the main surface of the one side.

4. The inverter device according to claim 2, characterized in that, The principal surface of one of them is a plane. The frame fastening part has at least four parts, and has through holes through which the screws pass along the normal direction of the main surface of one side.

5. The inverter device according to claim 2, characterized in that, The power module unit is arranged adjacent to the capacitor module of the flow path forming body on the opposite side. The flow path forming body has at least four capacitor fastening portions fastened to the capacitor module via screws; and at least four power module fastening portions fastened to the power module unit via screws.

6. The inverter device according to any one of claims 1 to 5, characterized in that, The capacitor module has: A capacitor housing, the capacitor housing including an opening surrounded by two main surfaces and the side surfaces, and through which the capacitor is housed; as well as A resin sealing material is filled inside the capacitor housing to seal the capacitor and expose it from the opening.

7. The inverter device according to claim 6, characterized in that, The capacitor casing is a rectangle with two main faces orthogonal to the side faces.

8. The inverter device according to any one of claims 1 to 5, characterized in that, The frame further includes: an inlet portion connected to the upstream side of the flow path of the flow path forming body, for which the refrigerant flows into the flow path; and an outlet portion connected to the downstream side of the flow path of the flow path forming body, for which the refrigerant flows out of the flow path. Both the inflow portion and the outflow portion are in contact with the side of the capacitor module.

9. The inverter device according to claim 8, characterized in that, The inverter device is installed on the motor for use and further includes: A first piping, connected to the inlet section, allows the refrigerant to flow into the flow path via the inlet section; and A second piping is connected to the outlet section, and the refrigerant flows out of the flow path via the outlet section. Both the first conduit and the second conduit extend toward the motor housing where the motor is housed.

10. The inverter device according to any one of claims 1 to 5, characterized in that, The flow path form cools the power module unit in such a way that the refrigerant comes into contact with the power module unit as the refrigerant passes through the flow path.

11. The inverter device according to any one of claims 1 to 5, characterized in that, It also includes a cover component fixed to the frame. The cover component includes: The cover body has a through-type window section; and A small cover component that can be freely installed and removed from the window.

12. The inverter device according to any one of claims 1 to 5, characterized in that, The capacitor module has four capacitors. Two of the four capacitors are arranged in the configuration direction of the circuit board, the power module unit, the flow path forming body, and the capacitor module, and two are arranged in a direction orthogonal to the configuration direction.

13. The inverter device according to any one of claims 1 to 5, characterized in that, It also includes a positive bus and a negative bus that connect the power module unit to the capacitor. When viewed along the normal direction of the side, the positive and negative busbars are configured such that they partially overlap each other.

14. A motor, characterized in that, An inverter device equipped with any one of claims 1 to 13.

15. A vehicle characterized in that, It is equipped with the motor as described in claim 14.

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