Electric power conversion device and rotary electric machine unit

Abstract

To provide an electric power conversion device which can realize a structure in which performance of an inverter can be easily achieved, and to provide a rotary electric machine unit.SOLUTION: An inverter device 30 has a first inverter module 100, a second inverter module 110, a first capacitor module 120, and a second capacitor module 130. The first inverter module 100 has a first inverter circuit. The second inverter module 110 has a second inverter circuit. The first capacitor module 120 has a first smoothing capacitor. The second capacitor module 130 has a second smoothing capacitor. An inverter housing 70 has an internal space that is partitioned into a first space 71a and a second space 75a by a water channel wall 81. The first space 71a is provided with the inverter modules 100, 110 and the capacitor modules 120, 130.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The disclosure in this specification relates to a power conversion device and a rotating electrical machine unit.

Background Art

[0002] Patent Document 1 describes a motor drive device for driving a motor. This motor drive device has a first inverter and a second inverter. The first inverter and the second inverter are formed including a plurality of switch elements. The first inverter and the second inverter are mounted on a single circuit board. Further, the motor drive device has a capacitor connected in parallel to the first inverter and the second inverter. The capacitor is mounted on a single capacitor board.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when the first inverter, the second inverter, and the capacitor are housed in a common housing, depending on the positional relationship between these inverters and the capacitor, it is conceivable that wiring such as the current-carrying path connecting the inverter and the capacitor becomes long. In this case, there is a concern that if the inductance increases as the wiring becomes long, it becomes difficult to exhibit the performance of the inverter.

[0005] One object of the present disclosure is to provide a power conversion device and a rotating electrical machine unit capable of realizing a configuration in which the performance of the inverter is easily exhibited.

Means for Solving the Problems

[0006] The multiple aspects disclosed in this specification adopt different technical means to achieve their respective purposes. Also, the claims and the reference signs in parentheses described in this section are an example showing the correspondence with the specific means described in the embodiments to be described later as one aspect, and do not limit the technical scope.

[0007] To achieve the above object, the disclosed aspect is a power conversion device (30) that converts the power supplied to a rotating electrical machine (20), having a first inverter (40) formed including a plurality of first switches (42, 43) and connected to a winding (22) of the rotating electrical machine, and a first inverter component (100) that converts the power supplied to the winding by the first inverter; having a second inverter (50) formed including a plurality of second switches (52, 53) and connected to the winding, and a second inverter component (110) that converts the power supplied to the winding by the second inverter; a first capacitor component (120) having a first smoothing capacitor (31) connected in parallel with the first inverter; a second capacitor component (130) having a second smoothing capacitor (32) connected in parallel with the second inverter; a housing (70) that houses the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component; a space partition portion (82) provided to partition the internal space of the housing into a first space (71a) and a second space (75a) and forming a refrigerant flow path (81) through which refrigerant flows; and the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space, and it is a power conversion device.

[0008] According to the above power conversion device, the space partition portion is provided to partition the first space and the second space, and forms a refrigerant flow path. In this configuration, the cooling effect of the refrigerant flowing through the refrigerant flow path can be imparted to the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component housed in the housing.

[0009] Moreover, the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space of the housing. In this configuration, it becomes possible to wire the wiring member that connects the inverter component and the capacitor component so as to be energizable without passing through the space partition portion. In other words, there is no need to wire the wiring member so as to penetrate the space partition portion at a position avoiding the refrigerant flow path and detour. Therefore, it is possible to suppress the increase in inductance due to the lengthening of the wiring member that connects the inverter component and the capacitor component so as to be energizable.

[0010] As described above, it is possible to suppress the decrease in the performance of the inverter due to the occurrence of temperature rise and inductance increase in the inverter component and the capacitor component. Therefore, it is possible to realize a configuration in which the performance of the inverter is easily exhibited in the power conversion device.

[0011] The disclosed aspect is a rotating electric machine (20) driven by power supply, a power conversion device (30) that converts the power supplied to the rotating electric machine, and a rotating electric machine unit (15) including a first inverter component (100) that includes a plurality of first switches (42, 43) and is formed to be connected to the winding (22) of the rotating electric machine, and converts the power supplied to the winding by the first inverter, a second inverter component (110) that includes a plurality of second switches (52, 53) and is formed to be connected to the winding, and converts the power supplied to the winding by the second inverter, A first capacitor component (120) having a first smoothing capacitor (31) connected in parallel to the first inverter, A second capacitor component (130) having a second smoothing capacitor (32) connected in parallel to the second inverter, A housing (70) that houses the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component, A space partition (82) that is provided so as to partition the internal space of the housing into a first space (71a) and a second space (75a) and forms a refrigerant flow path (81) through which refrigerant flows, and A rotating electrical machine unit in which the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space.

[0012] According to the rotating electrical machine unit, a configuration in which the performance of the inverter can be easily exhibited can be realized, similar to the power conversion device.

Brief Description of the Drawings

[0013]

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Modes for Carrying Out the Invention

[0014] Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each mode, parts corresponding to those described in the preceding mode may be denoted by the same reference numerals, and redundant descriptions may be omitted. When only a part of the configuration is described in each mode, other modes described previously can be applied to other parts of the configuration. Not only combinations of parts explicitly shown to be combinable in each embodiment, but also combinations of embodiments with each other are possible as long as there is no problem with the combination, even if not explicitly shown.

[0015] <First Embodiment> The drive system 10 shown in FIG. 1 is mounted on a moving body such as a vehicle or an aircraft. The drive system 10 is a system that drives to move the moving body. For example, the drive system 10 rotates a rotating body to move the moving body. Examples of the rotating body include vehicle wheels and aircraft propellers.

[0016] The drive system 10 has a battery 11, a power line 12, and a motor unit 15. The battery 11 is a power supply unit that supplies power to the motor unit 15. The battery 11 is a DC power source and supplies DC power to the motor unit 15. The battery 11 may be referred to as a power supply section. The battery 11 has a rechargeable secondary battery. Examples of the secondary battery include a lithium-ion battery and a nickel-metal hydride battery. The battery 11 is an energy storage device and can store power. The battery 11 has a positive electrode and a negative electrode. In the battery 11, the potential of the positive electrode is higher than that of the negative electrode. The positive electrode is the electrode on the high potential side. The negative electrode is the electrode on the low potential side. Note that as the power supply section, a fuel cell, a generator, or the like may be used.

[0017] The motor unit 15 is a device that drives to move a moving body. The motor unit 15 corresponds to a rotating electrical machine unit. The motor unit 15 has a motor 20 and an inverter device 30. The power line 12 electrically connects the battery 11 and the motor 20 via the inverter device 30 so that they can be energized. The power line 12 supplies the power of the battery 11 to the motor 20 via the inverter device 30. The inverter device 30 converts the power supplied to the motor 20. The inverter device 30 corresponds to a power conversion device.

[0018] The motor 20 is a multi-phase AC motor. For example, the motor 20 is a three-phase AC motor and has a U-phase, a V-phase, and a W-phase. The motor 20 is a drive source that drives for the moving body to move and functions as an electric motor. For example, the motor 20 is a brushless motor. The motor 20 is a motor generator. The motor 20 can function as a generator. The motor 20 corresponds to a rotating electrical machine.

[0019] The motor 20 has a motor coil 22. The motor coil 22 is a multi-phase coil. The motor coil 22 corresponds to a winding. For example, the motor coil 22 is a three-phase coil and is provided for each of the U-phase, V-phase, and W-phase. The motor 20 is an open-winding type motor. The multi-phase motor coils 22 are provided in the motor 20 in a mutually independent state. The motor coil 22 has a first coil end 22a and a second coil end 22b. Of the pair of ends that the motor coil 22 has, one is the first coil end 22a and the other is the second coil end 22b.

[0020] The inverter device 30 has a first inverter circuit 40 and a second inverter circuit 50. The inverter circuits 40 and 50 are power conversion circuits that convert power. The first inverter circuit 40 corresponds to the first inverter, and the second inverter circuit 50 corresponds to the second inverter. For example, the inverter circuits 40 and 50 are three-phase inverters and perform power conversion for each of the U-phase, V-phase, and W-phase. For example, the inverter circuits 40 and 50 are DC-AC conversion circuits that convert DC power into AC power.

[0021] The first inverter circuit 40 is connected to the first coil end 22a. The first inverter circuit 40 corresponds to the first inverter. The second inverter circuit 50 is connected to the second coil end 22b. The second inverter circuit 50 corresponds to the second inverter.

[0022] In the drive system 10, a plurality of power lines 12 are provided. The plurality of power lines 12 include a P line 12p, an N line 12n, and an output line 12o. The P line 12p, the N line 12n, and the output line 12o are energizable conduction paths. The P line 12p and the N line 12n electrically connect the battery 11 and the inverter circuits 40, 50 in an energizable manner. The P line 12p and the N line 12n are power supply paths that supply the power of the battery 11 to the inverter circuits 40, 50. The P line 12p is connected to the positive electrode of the battery 11. The P line 12p is the power line on the high potential side. The N line 12n is connected to the negative electrode of the battery 11. The N line 12n is the power line on the low potential side. A voltage lower than that of the P line 12p is applied to the N line 12n.

[0023] The P line 12p electrically connects the first inverter circuit 40 and the second inverter circuit 50 in an energizable manner without passing through the motor coil 22. The P line 12p has a first P line 12pa, a second P line 12pb, and a switching P line 12pc. The first P line 12pa is included in the first inverter circuit 40. The second P line 12pb is included in the second inverter circuit 50. The switching P line 12pc connects the first P line 12pa and the second P line 12pb without passing through the motor coil 22. The switching P line 12pc electrically connects the first inverter circuit 40 and the second inverter circuit 50 in an energizable manner without passing through the motor coil 22. The switching P line 12pc corresponds to a switching path and an up-switching path.

[0024] The N line 12n electrically connects the first inverter circuit 40 and the second inverter circuit 50 in an energizable manner without passing through the motor coil 22. The N line 12n has a first N line 12na, a second N line 12nb, and a switching N line 12nc. The first N line 12na is included in the first inverter circuit 40. The second N line 12nb is included in the second inverter circuit 50. The switching N line 12nc connects the first N line 12na and the second N line 12nb without passing through the motor coil 22.

[0025] Output line 12o electrically connects the inverter circuits 40, 50 and the motor 20. The output line 12o is a multi-phase power supply path. The output line 12o is provided for each of the multiple phases. The output line 12o connects the inverter circuits 40, 50 and the motor coil 22 in each of the multiple phases. The output line 12o is connected to the upper and lower arm circuits 41, 51 described later in each of the multiple phases.

[0026] The output line 12o connects the first inverter circuit 40 and the second inverter circuit 50 via the motor 20. The output line 12o has a first output line 12oa and a second output line 12ob. The first output line 12oa electrically connects the first inverter circuit 40 and the motor coil 22. The first output line 12oa is connected to the first coil end 22a. The first output line 12oa has a portion included in the first inverter circuit 40 and a portion included in the motor 20. The first output line 12oa corresponds to the first winding path.

[0027] The second output line 12ob electrically connects the second inverter circuit 50 and the motor coil 22. The second output line 12ob is connected to the second coil end 22b. The second output line 12ob has a portion included in the second inverter circuit 50 and a portion included in the motor 20. The second output line 12ob corresponds to the second winding path.

[0028] The first inverter circuit 40 has a first upper and lower arm circuit 41. The second inverter circuit 50 has a second upper and lower arm circuit 51. The upper and lower arm circuits 41, 51 are provided for each of the multiple phases. For example, the upper and lower arm circuits 41, 51 are provided for each of the U phase, V phase, and W phase. The upper and lower arm circuits 41, 51 may be referred to as legs or arm circuits. The upper and lower arm circuits 41, 51 are connected to the P line 12p, the N line 12n, and the output line 12o, respectively.

[0029] The first upper and lower arm circuit 41 has a first upper arm switch 42 and a first lower arm switch 43. The first upper arm switch 42 and the first lower arm switch 43 are connected in series with each other. The first upper arm switch 42 is connected to the first P line 12pa and the first output line 12oa. The first lower arm switch 43 is connected to the first N line 12na and the first output line 12oa. The first upper arm switch 42 and the first lower arm switch 43 correspond to the first switch. Also, the first upper arm switch 42 corresponds to the first upper switch, and the first lower arm switch 43 corresponds to the first lower switch.

[0030] The second upper and lower arm circuit 51 has a second upper arm switch 52 and a second lower arm switch 53. The second upper arm switch 52 and the second lower arm switch 53 are connected in series with each other. The second upper arm switch 52 is connected to the second P line 12pb and the second output line 12ob. The second lower arm switch 53 is connected to the second N line 12nb and the second output line 12ob. The second upper arm switch 52 and the second lower arm switch 53 correspond to the second switch.

[0031] The arm switches 42, 43, 52, and 53 are formed by switching elements. The switching elements are semiconductor elements such as semiconductor switches. The switching elements are switches that do not have mechanical contacts. The switching elements are transistors such as MOSFETs and IGBTs. MOSFET is an abbreviation for Metal - Oxide - Semiconductor Field - Effect Transistor. IGBT is an abbreviation for Insulated Gate Bipolar Transistor. In the inverter circuits 40 and 50, power conversion is performed by switching the arm switches 42, 43, 52, and 53. The arm switches 42, 43, 52, and 53 can transition between a conducting state in which current flows and a blocking state in which current is cut off.

[0032] The upper and lower arm circuits 41 and 51 have arm diodes 42a, 43a, 52a, and 53a. The arm diodes 42a, 43a, 52a, and 53a are diodes for reflux. The arm diodes 42a, 43a, 52a, and 53a are connected in antiparallel to the arm switches 42, 43, 52, and 53. The arm diodes 42a, 43a, 52a, and 53a may be parasitic diodes of the arm switches 42, 43, 52, and 53, or may be diodes provided separately from the parasitic diodes.

[0033] The inverter device 30 has a switching circuit 60. The switching circuit 60 is a circuit capable of switching the energization state of the motor coil 22. The switching circuit 60 can switch the energization state of the output line 12o by switching the energization state of at least one of the P line 12p and the N line 12n. For example, the switching circuit 60 can switch the energization state of the P line 12p.

[0034] The switching circuit 60 has a P switch 61. The P switch 61 is provided on the switching P line 12pc. The P switch 61 is provided between the first inverter circuit 40 and the second inverter circuit 50. The P switch 61 can cut off the energization of the switching P line 12pc. The P switch 61 corresponds to a switching switch.

[0035] Similar to the arm switches 42, 43, 52, and 53, the P switch 61 is formed by a switching element. The P switch 61 can shift between an energization state in which current flows and a cutoff state in which current is cut off. The P switch 61 may be referred to as a switch. Note that the P switch 61 may be formed by a mechanical switch. A mechanical switch is a switch having a mechanical contact.

[0036] The inverter device 30 has a first smoothing capacitor 31 and a second smoothing capacitor 32. The smoothing capacitors 31 and 32 are capable of smoothing the DC voltage supplied from the battery 11. The smoothing capacitors 31 and 32 are formed of capacitor elements such as film capacitors. The smoothing capacitors 31 and 32 are connected to the P line 12p and the N line 12n.

[0037] The first smoothing capacitor 31 is connected in parallel to the first inverter circuit 40. For example, the first smoothing capacitor 31 is connected to the first P line 12pa and the first N line 12na between the battery 11 and the first inverter circuit 40. The second smoothing capacitor 32 is connected in parallel to the second inverter circuit 50. For example, the second smoothing capacitor 32 is connected to the second P line 12pb and the second N line 12nb on the side opposite to the battery 11 via the second inverter circuit 50.

[0038] The inverter device 30 has a filter circuit 33. The filter circuit 33 is a circuit for reducing noise such as electromagnetic noise. Examples of the filter circuit 33 include an EMI filter. The filter circuit 33 is connected in parallel to the inverter circuits 40 and 50 and the smoothing capacitors 31 and 32. The filter circuit 33 is provided between the battery 11 and the first smoothing capacitor 31. The filter circuit 33 has a filter coil, a filter capacitor, etc. The filter coil is formed of a coil element. Examples of the filter coil include a choke coil. The filter capacitor is formed of a capacitor element. Examples of the filter capacitor include an X capacitor and a Y capacitor.

[0039] The inverter device 30 has an inverter control unit 35. The inverter control unit 35 controls the motor 20 via the inverter circuits 40, 50 and the switching circuit 60. The inverter control unit 35 generates a command signal using the detection results of various sensors and controls the driving of the inverter circuits 40, 50 and the switching circuit 60 by outputting this command signal. The inverter control unit 35 is sometimes referred to as a motor control unit.

[0040] The inverter control unit 35 is a control device such as an ECU. ECU is an abbreviation for Electronic Control Unit. The inverter control unit 35 has a processor, a memory, and a program. The inverter control unit 35 is mainly composed of a computer. This computer has a processor, a memory, an input / output interface, a bus for connecting these, etc. A program is stored in the memory. The program is a program for performing flight control.

[0041] The processor is hardware for arithmetic processing coupled to the memory. The processor executes various processes such as flight control processing by accessing the memory. The memory is a storage medium that stores a control program and the like. For example, the memory is a non-transitory tangible storage medium that non-temporarily stores a computer-readable program and data. The non-transitory tangible storage medium is a non-transitory tangible storage medium and is realized by a semiconductor memory or a magnetic disk, etc. The program includes computer-readable instructions that cause the processor to execute various functions. The processor is a processing unit that executes a predetermined process by executing the instructions included in the program.

[0042] The inverter control unit 35 includes a control circuit 36, a first drive circuit 37a, a second drive circuit 37b, and a switching drive circuit 37c. The control circuit 36 controls the inverter circuits 40, 50 and the switching circuit 60. The control circuit 36 generates drive commands for driving the inverter circuits 40, 50 and the switching circuit 60. Examples of the drive commands include switching commands for switching the arm switches 42, 43, 52, 53 and the P switch 61. In FIG. 1, the inverter control unit 35 is illustrated as the ECU, the control circuit 36 as the MG ECU, the first drive circuit 37a as the GDB1, the second drive circuit 37b as the GDB2, and the switching drive circuit 37c as the GDB3.

[0043] The drive circuits 37a, 37b, 37c can independently switch a plurality of switches according to the drive commands. The drive circuits 37a, 37b, 37c generate drive signals according to the drive commands and output these drive signals to the inverter circuits 40, 50 and the switching circuit 60. The first drive circuit 37a generates a drive signal for driving the first upper arm switch 42 and the first lower arm switch 43, and outputs this drive signal to the first inverter circuit 40. The second drive circuit 37b generates a drive signal for driving the second upper arm switch 52 and the second lower arm switch 53, and outputs this drive signal to the second inverter circuit 50. The switching drive circuit 37c generates a drive signal for driving the P switch 61, and outputs this drive signal to the switching circuit 60. The drive circuits 37a, 37b, 37c may be referred to as drivers or driver circuits.

[0044] As drive modes of the motor 20, there are star connection drive and open connection drive. In the inverter control unit 35, as control modes for controlling the motor 20, there are a star connection drive mode and an open connection drive mode. As drive regions indicating the drive modes of the motor 20, there are a star connection drive region and an open connection drive region. For example, in the drive region, the horizontal axis represents the motor rotation speed and the vertical axis represents the motor torque. The star connection drive region is the normal operation region. The open connection drive region is a region where at least one of the motor rotation speed and the motor torque is higher than that in the star connection drive region. Star connection drive is sometimes referred to as Y drive. Open connection drive is sometimes referred to as H drive.

[0045] When the drive mode of the motor 20 is star connection drive, in the inverter device 30, the inverter circuits 40, 50 and the switching circuit 60 are driven so that the neutral point of the motor coil 22 is formed by the second inverter circuit 50. In this case, in the switching circuit 60, the P switch 61 is driven so as to cut off the energization of the switching P line 12pc. For example, the P switch 61 is in the cutoff state. Also, in the second inverter circuit 50, for all three phases, one of the second upper arm switch 52 and the second lower arm switch 53 is in the energized state and the other is in the cutoff state so that the three-phase motor coils 22 are star-connected. Then, the arm switches 42, 43 are switched by the first inverter circuit 40 so that the motor 20 is driven.

[0046] When the drive mode of the motor 20 is open connection drive, in the inverter device 30, the second inverter circuit 50 is driven so that the neutral point of the motor coil 22 is not formed. In this case, since the neutral point of the motor coil 22 is in an open state, an open connection circuit is formed in each of the plurality of phases by the first inverter circuit 40 and the second inverter circuit 50. Also, in this case, in the switching circuit 60, the P switch 61 is driven so that the switching P line 12pc can be energized. For example, the P switch 61 is in the energized state.

[0047] As shown in FIG. 2, the motor 20 has a motor unit 21 and a motor housing 24. The motor unit 21 has a stator, a rotor, and a shaft. The stator is a fixed element and is fixed to the motor housing 24. The rotor is a rotating element and rotates relative to the stator. The shaft rotates together with the rotor. The motor unit 21 has an armature and a field magnet. For example, the stator is the armature and the rotor is the field magnet. The motor coil 22 is included in the motor unit 21. The motor coil 22 is included in the armature. For example, the motor coil 22 is included in the stator.

[0048] The motor housing 24 houses the motor unit 21. The motor housing 24 is formed of a metal material or the like. The motor housing 24 is fixed to an inverter housing 70 described later. The internal space of the motor housing 24 is open toward the inverter housing 70.

[0049] The motor 20 has a motor connector 25. The motor connector 25 is housed in the motor housing 24. The motor connector 25 is a connector member for electrically connecting the motor coil 22 to an inverter circuit 40, 50, etc. so that electricity can be supplied. The motor connector 25 is detachably connected to an output connector 150 described later. Note that the motor connector 25 may be provided outside the motor housing 24.

[0050] The motor connector 25 has motor connector terminals 26. The motor connector terminals 26 are conductive members and are formed of a conductive material such as copper. The motor connector terminals 26 are terminal members for electrically connecting the motor coil 22 to the inverter circuits 40, 50, etc. so that electricity can flow. The motor connector terminals 26 form a part of the output line 12o in the motor 20. A plurality of motor connector terminals 26 are provided in the motor connector 25. The plurality of motor connector terminals 26 include a motor connector terminal 26 that forms a part of the first output line 12oa and a motor connector terminal 26 that forms a part of the second output line 12ob. Wiring members such as bus bars and cables extend from the motor connector 25. This wiring member is a member for electrically connecting the motor connector terminals 26 and the motor coil 22 so that electricity can flow.

[0051] As shown in FIGS. 3 to 5, the inverter device 30 has an inverter housing 70, a switching module 90, a first inverter module 100, a second inverter module 110, a first capacitor module 120, and a second capacitor module 130. The modules 90, 100, 110, 120, 130 are electrical components and electronic components. The modules 90, 100, 110, 120, 130 are independent components from each other. The modules 90, 100, 110, 120, 130 are housed in the inverter housing 70. The modules 90, 100, 110, 120, 130 are provided in the internal space of the inverter housing 70.

[0052] The inverter device 30 has a plurality of wiring members such as bus bars and cables. The plurality of wiring members include wiring members that connect the modules 90, 100, 110, 120, and 130 so that they can be energized with each other. Further, the plurality of wiring members include a wiring member that forms the P line 12p, a wiring member that forms the N line 12n, a wiring member that forms the output line 12o, and the like. For example, as the wiring member that forms the P line 12p, there are a wiring member that forms the first P line 12pa, a wiring member that forms the second P line 12pb, and the like. As the wiring member that forms the N line 12n, there are a wiring member that forms the first N line 12na, a wiring member that forms the second N line 12nb, and the like. As the wiring member that forms the output line 12o, there are a wiring member that forms the first output line 12oa, a wiring member that forms the second output line 12ob, and the like. Note that the fact that a wiring member connects a plurality of components so that they can be energized may simply be referred to as the wiring member connecting a plurality of members.

[0053] In the inverter device 30, the modules 90, 100, 110, 120, and 130 may generate heat as the inverter device 30 is driven. The modules 90, 100, 110, 120, and 130 may be referred to as heat-generating components. For example, the switching module 90 is likely to generate heat as the switching circuit 60 is energized or driven. The first inverter module 100 is likely to generate heat as the first inverter circuit 40 is energized or driven. The second inverter module 110 is likely to generate heat as the second inverter circuit 50 is energized or driven. The first capacitor module 120 is likely to generate heat as the first smoothing capacitor 31 is energized. The second capacitor module 130 is likely to generate heat as the second smoothing capacitor 32 is energized.

[0054] In the inverter device 30, the driving states of the inverter circuits 40 and 50 are different according to the driving mode of the motor 20. For example, when the driving mode of the motor 20 is star connection driving, in the second inverter circuit 50, switching of the arm switches 52 and 53 hardly occurs. On the other hand, in the first inverter circuit 40, switching of the arm switches 42 and 43 is repeatedly performed. In this case, in the first inverter module 100, heat is more likely to be generated than in the second inverter module 110. When the driving mode of the motor 20 is open connection driving, switching is performed in the same manner in the first inverter circuit 40 and the second inverter circuit 50. In this case, the first inverter module 100 and the second inverter module 110 are equally likely to generate heat.

[0055] In the inverter device 30, the heat generation states in the capacitor modules 120 and 130 are different according to the driving mode of the motor 20. When heat is likely to be generated in the inverter modules 100 and 110, heat may also be likely to be generated in the capacitor modules 120 and 130. For example, when the first inverter module 100 is more likely to generate heat than the second inverter module 110, the first capacitor module 120 is more likely to generate heat than the second capacitor module 130.

[0056] The inverter housing 70 is formed of a metal material or the like. The inverter housing 70 has heat conductivity. For example, the inverter housing 70 is formed in a rectangular shape in plan view as a whole. The inverter housing 70 corresponds to the housing. The internal space of the inverter housing 70 has a first space 71a and a second space 75a. The internal space of the inverter housing 70 is partitioned into two spaces. One of the two spaces is the first space 71a, and the other is the second space 75a. The modules 90, 100, 110, 120, and 130 are housed in one of the first space 71a and the second space 75a.

[0057] The inverter housing 70 has an inverter case portion 701 and an inverter lid portion 702. The inverter case portion 701 has a case outer wall 701a and a case partition wall 701b. The case outer wall 701a and the inverter lid portion 702 form the outer surface of the inverter housing 70. The case partition wall 701b is provided on the inner peripheral side of the case outer wall 701a.

[0058] The case partition wall 701b divides the internal space of the inverter housing 70 into a first space 71a and a second space 75a. The first space 71a and the second space 75a are arranged in the height direction Z. For the motor unit 15, the width direction X, the depth direction Y, and the height direction Z are orthogonal to each other. In the motor unit 15, the motor housing 24 and the inverter housing 70 are arranged in the height direction Z. In the height direction Z, the first space 71a is between the motor housing 24 and the second space 75a. The first space 71a is in a state of being covered by the motor housing 24. The inverter housing 70 is in a state of covering the internal space of the motor housing 24. For example, the first space 71a and the internal space of the motor housing 24 are continuous spaces with each other.

[0059] The inverter housing 70 has a shape in which a part of the case outer wall 701a is recessed inward. Due to the recessed portion, a stepped portion is formed on the outer surface of the inverter housing 70. In the inverter housing 70, in the width direction X, the width dimension of the second space 75a is smaller than the width dimension of the second space 75a. In the depth direction Y, the width dimension of the second space 75a and the width dimension of the first space 71a are substantially the same.

[0060] The inverter lid portion 702 is provided on the side opposite to the motor housing 24 via the inverter case portion 701. The inverter lid portion 702 is in a state of covering the second space 75a from the side opposite to the first space 71a.

[0061] The inverter housing 70 has a first housing portion 71 and a second housing portion 75. The first housing portion 71 is a portion that forms a first space 71a in the inverter housing 70. The second housing portion 75 is a portion that forms a second space 75a in the inverter housing 70. The first housing portion 71 and the second housing portion 75 are arranged side by side in the height direction Z. The case partition wall 701b includes the boundary between the first housing portion 71 and the second housing portion 75.

[0062] The first housing portion 71 has a first outer peripheral wall 72 and a first bottom portion 73. The first outer peripheral wall 72 forms the outer peripheral surface of the inverter housing 70. The first space 71a is the inner space of the first outer peripheral wall 72. The first bottom portion 73 extends in a direction orthogonal to the height direction Z. The first outer peripheral wall 72 extends in the height direction Z from the first bottom portion 73. The first outer peripheral wall 72 has a first width wall 72x and a first depth wall 72y. The first width walls 72x are arranged in a pair in the depth direction Y with the first space 71a therebetween. The first width walls 72x extend in the width direction X as a whole. The first depth walls 72y are arranged in a pair in the width direction X with the first space 71a therebetween. The first depth walls 72y extend in the depth direction Y as a whole.

[0063] The second housing portion 75 has a second outer peripheral wall 76, a second bottom portion 77, and a second ceiling portion 78. The second outer peripheral wall 76 forms the outer peripheral surface of the inverter housing 70. The second space 75a is the inner space of the second outer peripheral wall 76. The second bottom portion 77 and the second ceiling portion 78 extend in a direction orthogonal to the height direction Z. The second bottom portion 77 and the second ceiling portion 78 are arranged side by side in the height direction Z with the second space 75a therebetween. The second outer peripheral wall 76 extends in the height direction Z so as to span between the second bottom portion 77 and the second ceiling portion 78. The second outer peripheral wall 76 has a second width wall 76x and a second depth wall 76y. The second width wall 76x extends in the width direction X as a whole. The second depth walls 76y are arranged in a pair in the width direction X with the second space 75a therebetween. The second depth walls 76y extend in the depth direction Y as a whole.

[0064] In the inverter housing 70, one second width wall 76x extends in the height direction Z from one first width wall 72x, and the other second width wall 76x extends in the height direction Z from the other first width wall 72x. Also, while one second depth wall 76y extends in the height direction Z from one first depth wall 72y, the other second depth wall 76y is provided at a position separated from the other first depth wall 72y toward the one second depth wall 76y side. The other second depth wall 76y is provided between the pair of first depth walls 72y.

[0065] The inverter case part 701 is formed including a part of the first housing part 71 and a part of the second housing part 75. In the second housing part 75, a part of the second outer peripheral wall 76 and the second bottom part 77 are included in the inverter case part 701. The inverter lid part 702 is formed including a part of the second housing part 75. In the second housing part 75, a part of the second outer peripheral wall 76 and the second ceiling part 78 are included in the inverter lid part 702.

[0066] In FIG. 3, the first inverter module 100 has a first inverter circuit 40. The first inverter module 100 is a component that converts the power supplied to the motor coil 22 by the first inverter circuit 40. The first inverter module 100 corresponds to the first inverter component.

[0067] The first inverter module 100 has a first upper switch part 101, a first lower switch part 102, and a first switch protection part 103. The first upper switch part 101 is a component having a first upper arm switch 42. The first lower switch part 102 is a component having a first lower arm switch 43. The switch parts 101 and 102 form the arm switches 42 and 43. The switch parts 101 and 102 are formed of a semiconductor chip or the like. The first switch protection part 103 protects the switch parts 101 and 102. The first switch protection part 103 is formed including a circuit board, a sealing resin, and the like. For example, in the first inverter module 100, the switch parts 101 and 102 mounted on the circuit board are sealed with a sealing resin.

[0068] The first inverter module 100 has switch units 101 and 102 for each of a plurality of phases. The first inverter module 100 is formed in a rectangular plate shape as a whole. The switch units 101 and 102 are arranged in plural along the plate surface of the first inverter module 100. For example, the switch units 101 and 102 are arranged in plural in the long side direction of the first inverter module 100.

[0069] The first inverter module 100 has a first P terminal 104, a first N terminal 105, and a first output terminal 106. The terminals 104 to 106 are conductive members and are formed of a conductive material such as copper. A wiring member is connected to each of the terminals 104 to 106 so as to be energizable. The first P terminal 104 is a terminal member for connecting the first upper arm switch 42 to the first P line 12pa. For example, the first P terminal 104 forms a part of the first P line 12pa. The first N terminal 105 is a terminal member for connecting the first lower arm switch 43 to the first N line 12na. For example, the first N terminal 105 forms a part of the first N line 12na.

[0070] The first output terminal 106 is a terminal member for connecting the first upper arm switch 42 and the first lower arm switch 43 to the motor coil 22. For example, the first output terminal 106 forms a part of the first output line 12oa. The first output terminal 106 corresponds to the first path terminal.

[0071] The terminals 104 to 106 are arranged along the outer peripheral end of the first inverter module 100. The terminals 104 to 106 are provided so as to protrude outward from the first switch protection part 103. For example, the terminals 104 to 106 are arranged in plural along the long side of the first inverter module 100. The first output terminal 106 is provided on the side opposite to the first P terminal 104 and the first N terminal 105 via the first switch protection part 103.

[0072] The second inverter module 110 has a second inverter circuit 50. The second inverter module 110 is a component that converts the power supplied to the motor coil 22 by the second inverter circuit 50. The second inverter module 110 corresponds to the second inverter component.

[0073] The second inverter module 110 has a second upper switch section 111, a second lower switch section 112, and a second switch protection section 113. The second upper switch section 111 is a component having a second upper arm switch 52. The second lower switch section 112 is a component having a second lower arm switch 53. The switch sections 111, 112 are formed of a semiconductor chip or the like. The second switch protection section 113 protects the switch sections 111, 112. The second switch protection section 113 is formed including a circuit board, a sealing resin, and the like. For example, in the second inverter module 110, the switch sections 111, 112 mounted on the circuit board are sealed with a sealing resin.

[0074] The second inverter module 110 has switch sections 111, 112 for each of a plurality of phases. The second inverter module 110 is formed in a rectangular plate shape as a whole. The plate surface of the second inverter module 110 extends in a direction orthogonal to the height direction Z. A plurality of the switch sections 111, 112 are arranged along the plate surface of the second inverter module 110. For example, a plurality of the switch sections 111, 112 are arranged in the long side direction of the second inverter module 110.

[0075] The second inverter module 110 has a second P terminal 114, a second N terminal 115, and a second output terminal 116. Terminals 204 to 206 are conductive members and are formed of a conductive material such as copper. Wiring members are electrically connected to each of terminals 204 to 206. The second P terminal 114 is a terminal member for connecting the second upper arm switch 52 to the second P line 12pb. For example, the second P terminal 114 forms a part of the second P line 12pb. The second N terminal 115 is a terminal member for connecting the second lower arm switch 53 to the second N line 12nb. For example, the second N terminal 115 forms a part of the second N line 12nb.

[0076] The second output terminal 116 is a terminal member for connecting the second upper arm switch 52 and the second lower arm switch 53 to the motor coil 22. For example, the second output terminal 116 forms a part of the second output line 12ob. The second output terminal 116 corresponds to the second path terminal.

[0077] Terminals 204 to 206 are arranged along the outer peripheral edge of the second inverter module 110. Terminals 204 to 206 are provided so as to protrude outward from the second switch protection portion 113. For example, a plurality of terminals 204 to 206 are arranged along the long side of the second inverter module 110. The second output terminal 116 is provided on the side opposite to the second P terminal 114 and the second N terminal 115 via the second switch protection portion 113.

[0078] The first inverter module 100 and the second inverter module 110 are the same inverter components. Two inverter components, which are the same components, are housed in the inverter housing 70. And, of the two inverter components, one is used as the first inverter module 100 and the other is used as the second inverter module 110. For example, in the first inverter module 100 and the second inverter module 110, the positional relationship between the first upper switch portion 101 and the first lower switch portion 102 is the same as the positional relationship between the second upper switch portion 111 and the second lower switch portion 112.

[0079] When the first inverter module 100 and the second inverter module 110 are the same inverter component, for example, the model numbers assigned to the products may be the same for the first inverter module 100 and the second inverter module 110. If the first inverter module 100 and the second inverter module 110 have the same model number, etc., they are the same component even if the shapes and sizes of the switch parts 101, 102, 111, 112 and the switch protection parts 103, 113 are slightly different.

[0080] The inverter component has an inverter circuit formed by including a plurality of switching elements. In the inverter component used as the first inverter module 100, one of the plurality of switching elements is used as the first upper arm switch 42, and the other one is used as the first lower arm switch 43. Further, the inverter component has a plurality of switch parts and switch protection parts. In the inverter component used as the first inverter module 100, some of the switch parts are used as the first upper switch part 101, and some of the other switch parts are used as the first lower switch part 102. Also, in this inverter component, the switch protection part is used as the first switch protection part 103.

[0081] In the inverter component used as the second inverter module 110, one of the plurality of switching elements is used as the second upper arm switch 52, and the other one is used as the second lower arm switch 53. Also, in the inverter component used as the second inverter module 110, some of the switch parts are used as the second upper switch part 111, and some of the other switch parts are used as the second lower switch part 112. Also, in this inverter component, the switch protection part is used as the second switch protection part 113.

[0082] The first capacitor module 120 forms the first smoothing capacitor 31. The first capacitor module 120 is formed in a rectangular parallelepiped shape as a whole. The first capacitor module 120 corresponds to the first capacitor component and the capacitor component. The first capacitor module 120 has a first capacitor section 121 and a first capacitor protection section 122. The first capacitor section 121 is a component having the first smoothing capacitor 31. The first capacitor protection section 122 protects the first capacitor section 121. The first capacitor protection section 122 is formed including a case, a sealing resin, and the like.

[0083] The second capacitor module 130 forms the second smoothing capacitor 32. The second capacitor module 130 is formed in a rectangular parallelepiped shape as a whole. The second capacitor module 130 corresponds to the second capacitor component and the capacitor component. The second capacitor module 130 has a second capacitor section 131 and a second capacitor protection section 132. The second capacitor section 131 is a component having the second smoothing capacitor 32. The second capacitor protection section 132 protects the second capacitor section 131. The second capacitor protection section 132 is formed including a case, a sealing resin, and the like.

[0084] The inverter device 30 has a first capacitor wiring 145 and a second capacitor wiring 146. The capacitor wirings 145 and 146 extend from the capacitor modules 120 and 130. The capacitor wirings 145 and 146 are electrically connected to the inverter modules 100 and 110 and a filter component 180 described later. As the first capacitor wiring 145, there are a wiring member forming at least a part of the P line 12p and a wiring member forming at least a part of the N line 12n. The first capacitor wiring 145 is energizably connected to the first capacitor section 121. As the second capacitor wiring 146, there are a wiring member forming at least a part of the P line 12p and a wiring member forming at least a part of the N line 12n. The second capacitor wiring 146 is energizably connected to the second capacitor section 131.

[0085] The switching module 90 forms a switching circuit 60. The switching module 90 is a component that can cut off the energization of the switching P line 12pc by the P switch 61. The switching module 90 corresponds to a switching component. The switching module 90 has a P switch part 91 and a switching switch protection part 93. The P switch part 91 is a component having the P switch 61. The P switch part 91 forms the P switch 61. The P switch part 91 is formed by a semiconductor chip or the like. The switching switch protection part 93 protects the P switch part 91. The switching switch protection part 93 is formed including a circuit board, a sealing resin, and the like. For example, in the switching module 90, the P switch part 91 mounted on the circuit board is sealed by a sealing resin.

[0086] The switching module 90 has a first switching P terminal 94 and a second switching P terminal 95. The switching P terminals 94, 95 are conductive members and are formed of a conductive material such as copper. Wiring members are connected to each of the switching P terminals 94, 95 so as to be energizable. The first switching P terminal 94 is a terminal member for connecting the P switch 61 to the first P line 12pa. For example, the first switching P terminal 94 forms a part of the switching P line 12pc. The second switching P terminal 95 is a terminal member for connecting the P switch 61 to the second P line 12pb. For example, the second switching P terminal 95 forms a part of the switching P line 12p.

[0087] The switching P terminals 94, 95 are arranged along the outer peripheral end of the switching module 90. The switching P terminals 94, 95 are provided so as to protrude outward from the switching switch protection part 93. For example, the first switching P terminal 94 is provided on the side opposite to the second switching P terminal 95 via the switching switch protection part 93.

[0088] The inverter device 30 has an output connector 150. The output connector 150 is housed in the inverter housing 70. The output connector 150 is a connector member for electrically connecting the inverter circuits 40, 50 to the motor coil 22 or the like. The output connector 150 is detachably connected to the motor connector 25. The output connector 150 is detachably connected to the motor coil 22 side. The output connector 150 corresponds to the inverter connector. Note that at least a part of the output connector 150 may be provided outside the inverter housing 70.

[0089] The output connector 150 has an output connector case 151 and output connector terminals 152. The output connector terminals 152 are conductive members formed of a conductive material such as copper. The output connector terminals 152 are terminal members for electrically connecting the inverter circuits 40, 50 to the motor coil 22 or the like. The output connector terminals 152 form a part of the output line 12o in the inverter device 30.

[0090] When the output connector 150 and the motor connector 25 are connected to each other, the output connector terminals 152 and the motor connector terminals 26 are electrically connected. In the motor unit 15, the inverter housing 70 is assembled to the motor housing 24 so that the output connector 150 is connected to the motor connector 25.

[0091] A plurality of output connector terminals 152 are provided on the output connector 150. The plurality of output connector terminals 152 include a first connector terminal 152a and a second connector terminal 152b. The first connector terminal 152a forms a part of the first output line 12oa. The first connector terminal 152a is provided for each of the plurality of phases. The second connector terminal 152b forms a part of the second output line 12ob. The second connector terminal 152b is provided for each of the plurality of phases.

[0092] The output connector case 151 houses the output connector terminals 152. The output connector case 151 is formed in a plate shape as a whole. The output connector case 151 has an output plate surface 151a and an output opposing surface 151b. The output plate surface 151a is the plate surface of the output connector case 151 and is arranged in a pair in the thickness direction of the output connector case 151. The output plate surface 151a corresponds to the connector plate surface. The output opposing surface 151b is one of the pair of end surfaces of the output connector case 151. The output opposing surface 151b is the surface that faces the motor connector 25 when the output connector 150 and the motor connector 25 are connected. The output opposing surface 151b is in a state where at least a part of the output connector terminals 152 is exposed. In the output connector terminals 152, the part exposed at the output opposing surface 151b is electrically connected to the motor connector terminals 26.

[0093] A plurality of output connector terminals 152 are arranged along the output plate surface 151a and the output opposing surface 151b in the output connector case 151. For example, the output connector terminals 152 extend in a direction orthogonal to the output opposing surface 151b. The first connector terminal 152a and the second connector terminal 152b are arranged along the output opposing surface 151b. The first connector terminal 152a and the second connector terminal 152b are arranged in plural along the output opposing surface 151b.

[0094] The inverter device 30 has a first output wiring 143 and a second output wiring 144. The output wirings 143 and 144 extend from the output connector 150. The output wirings 143 and 144 are electrically connected to the inverter modules 100, 110, etc. The first output wiring 143 is a wiring member that forms at least a part of the first output line 12oa. The first output wiring 143 is wired so as to span between the first connector terminal 152a and the first output terminal 106. The first output wiring 143 is energizably connected to each of the first connector terminal 152a and the first output terminal 106. The second output wiring 144 is a wiring member that forms at least a part of the second output line 12ob. The second output wiring 144 is wired so as to span between the second connector terminal 152b and the second output terminal 116. The second output wiring 144 is energizably connected to each of the second connector terminal 152b and the second output terminal 116.

[0095] The inverter device 30 has a first drive board 171, a second drive board 172, a switching drive board 173, and a control board 174. The drive boards 171 to 173 and the control board 174 are formed of a circuit board such as a printed circuit board. The drive boards 171 to 173 and the control board 174 are formed in a rectangular plate shape as a whole. The first drive board 171 forms at least a part of the first drive circuit 37a. The second drive board 172 forms at least a part of the second drive circuit 37b. The switching drive board 173 forms at least a part of the switching drive circuit 37c. The control board 174 forms at least a part of the control circuit 36. The boards 171 to 174 are communicably connected to each other by a wiring member such as a communication line. For example, the control board 174 is communicably connected to each of the first drive board 171, the second drive board 172, and the switching drive board 173.

[0096] As shown in FIG. 4, the inverter device 30 has a filter component 180. The filter component 180 is housed in the inverter housing 70. The filter component 180 is an electrical component or an electronic component. The filter component 180 forms at least a part of the filter circuit 33. The filter component 180 is a component for forming the filter circuit 33. A plurality of filter components 180 are provided in the internal space of the inverter housing 70. The plurality of filter components 180 include a filter coil component 181 and a filter capacitor component 182. The filter coil component 181 forms a coil element such as a filter coil. The coil element may be referred to as a reactor element. The filter capacitor component 182 forms a capacitor element such as a filter capacitor.

[0097] The inverter device 30 has a filter component group 180G. The filter component group 180G is housed in the inverter housing 70. The filter component group 180G is formed by at least two filter components 180. In the filter component group 180G, a plurality of filter components 180 are arranged together so as to be assembled. In the filter component group 180G, two adjacent filter components 180 are in a state of approaching each other. In the filter component group 180G, wiring 141 to 146 of a current sensor described later may be provided between two adjacent filter components 180. In the filter component group 180G, modules 90, 100, 110, 120, 130, etc. are not provided between two adjacent filter components 180.

[0098] Note that the filter component group 180G does not necessarily include all the filter components 180 housed in the inverter housing 70. For example, among the plurality of filter components 180 housed in the inverter housing 70, it is sufficient that at least two filter components 180 are included in the filter component group 180G.

[0099] The inverter device 30 has an input connector 160. The input connector 160 is housed in the inverter housing 70. The input connector 160 is a connector member for electrically connecting the inverter circuits 40, 50, etc. to the battery 11. A power supply connector on the battery 11 side is detachably connected to the input connector 160. The power supply connector is a connector member for supplying power from the battery 11 to the motor unit 15. Note that at least a part of the input connector 160 may be provided outside the inverter housing 70.

[0100] The input connector 160 has an input connector case 161 and input connector terminals 162. The input connector terminals 162 are conductive members formed of a conductive material such as copper. The input connector terminals 162 are terminal members for electrically connecting the inverter circuits 40, 50, etc. to the battery 11. The input connector terminals 162 form part of the P line 12p and part of the N line 12n.

[0101] A plurality of input connector terminals 162 are provided in the input connector 160. The plurality of input connector terminals 162 include P connector terminals 162a and N connector terminals 162b. The P connector terminals 162a form part of the P line 12p. The N connector terminals 162b form part of the N line 12n.

[0102] The input connector case 161 houses the input connector terminals 162. The input connector case 161 is formed in a plate shape as a whole. The input connector case 161 has an input plate surface 161a and an input opposing surface 161b. The input plate surface 161a is the plate surface of the input connector case 161 and is arranged in a pair in the thickness direction of the input connector case 161. The input opposing surface 161b is one of the pair of end surfaces of the input connector case 161. The input opposing surface 161b is the surface that faces the power supply connector when the input connector 160 and the power supply connector are connected. The input opposing surface 161b is in a state where at least a part of the input connector terminals 162 is exposed.

[0103] The input connector terminals 162 are arranged in plurality along the input board surface 161a and the input facing surface 161b in the input connector case 161. For example, the input connector terminals 162 extend in a direction orthogonal to the input facing surface 161b. The P connector terminal 162a and the N connector terminal 162b are arranged along the input facing surface 161b. For example, the P connector terminal 162a and the N connector terminal 162b are each included in a plurality of input connector terminals 162.

[0104] The inverter device 30 has a P input wiring 141 and an N input wiring 142. The input wirings 141 and 142 extend from the input connector 160. The input wirings 141 and 142 are electrically connected to a filter component 180 or the like. The P input wiring 141 is a wiring member that forms at least a part of the P line 12p. The P input wiring 141 is energizably connected to the P connector terminal 162a. The N input wiring 142 is a wiring member that forms at least a part of the N line 12n. The N input wiring 142 is energizably connected to the N connector terminal 162b.

[0105] As shown in FIGS. 3 to 5, the inverter device 30 has a cooler 80. The cooler 80 is capable of cooling the inverter device 30. The cooler 80 cools the inverter device 30 using a refrigerant. The refrigerant is a liquid such as water. The refrigerant may also be a gas such as air. The refrigerant may be any fluid. In the cooler 80, the refrigerant flows inside the cooler 80. The cooler 80 is included in a cooling device. The cooling device is mounted on a moving body together with the drive system 10. The cooling device has a pump for flowing the refrigerant to the cooler 80. In the cooling device, the refrigerant flows through the cooler 80 by driving the pump. The cooling device has a connection pipe for connecting the pump and the cooler 80. In the cooling device, the refrigerant flows through both the cooler 80 and the connection pipe.

[0106] The cooler 80 has a water passage 81, a water passage wall 82, a first water passage connector 83, and a second water passage connector 84. The water passage 81 is a refrigerant flow path for flowing refrigerant. The inverter housing 70 forms at least a part of the water passage 81. The cooler 80 has a water passage forming portion that forms the water passage 81. The water passage forming portion includes the water passage wall 82 and the water passage connectors 83 and 84. The water passage wall 82 and the water passage connectors 83 and 84 form at least a part of the water passage 81. The water passage wall 82 corresponds to a flow path forming portion. Note that the water passage forming portion may include piping members and the like.

[0107] The water passage 81 and the water passage wall 82 are provided at least between the first space 71a and the second space 75a. The water passage 81 and the water passage wall 82 extend along the first bottom portion 73. The water passage wall 82 includes a part of the first outer peripheral wall 72, the first bottom portion 73, a part of the second outer peripheral wall 76, and the second bottom portion 77. The water passage wall 82 includes a part of the case outer wall 701a and the case partition wall 701b. At the stepped portion of the inverter housing 70, the water passage 81 and the water passage wall 82 extend along the outer surface of the inverter housing 70.

[0108] The water passage wall 82 is a wall portion that extends in a direction orthogonal to the height direction Z. The water passage wall 82 has a first water passage wall surface 82a and a second water passage wall surface 82b. Of the pair of wall surfaces that the water passage wall 82 has, one is the first water passage wall surface 82a and the other is the second water passage wall surface 82b. The first water passage wall surface 82a and the second water passage wall surface 82b extend in a direction orthogonal to the height direction Z. At least a part of the water passage wall 82 partitions the first space 71a and the second space 75a. The water passage wall 82 corresponds to a space partitioning portion. The water passage wall 82 may be referred to as a space partition wall. The first water passage wall surface 82a partitions the first space 71a. The second water passage wall surface 82b partitions the second space 75a.

[0109] The water passage 81 is provided inside the water passage wall 82. The water passage 81 is provided between a first water passage wall surface 82a and a second water passage wall surface 82b in the water passage wall 82. The water passage 81 extends along the water passage wall surfaces 82a, 82b. The water passage 81 has a first water passage opening 811 and a second water passage opening 812. Of the pair of end portions that the water passage 81 has, one is the first water passage opening 811 and the other is the second water passage opening 812. The water passage 81 is a single flow path that extends along the water passage wall surfaces 82a, 82b. In the water passage 81, refrigerant flows in from one of the first water passage opening 811 and the second water passage opening 812 and flows out from the other. That is, of the first water passage opening 811 and the second water passage opening 812, one is an inlet and the other is an outlet.

[0110] The water passage connectors 83, 84 are connector members for connecting the connection piping of the cooling device to the water passage 81. The water passage connectors 83, 84 are provided on the outer surface of the inverter housing 70. The water passage connectors 83, 84 extend outward from the case outer wall 701a. For example, the water passage connectors 83, 84 are provided at a position straddling the boundary portion between the first outer peripheral wall 72 and the second outer peripheral wall 76 in the height direction Z. The first water passage connector 83 forms the first water passage opening 811. The second water passage connector 84 forms the second water passage opening 812.

[0111] The water passage wall 82 is provided with a water passage wall hole 85. The water passage wall hole 85 is a hole that penetrates the water passage wall 82 in the height direction Z. At least one water passage wall hole 85 is provided in the water passage wall 82. The water passage wall hole 85 and the water passage 81 are arranged in a direction orthogonal to the height direction Z. The water passage wall hole 85 is provided at a position away from the water passage 81 in the direction orthogonal to the height direction Z. The water passage wall hole 85 is in a state of communicating the first space 71a and the second space 75a.

[0112] The inverter device 30 has a current sensor. The current sensor has a sensor element such as a Hall element. The current sensor is a current detection unit and detects the current flowing through the output line 12o. The current sensor may also detect the current flowing through the P line 12p or the N line 12n.

[0113] In this embodiment, the modules 90, 100, 110, 120, and 130 are housed in one of the first space 71a and the second space 75a. As shown in FIGS. 3 and 5, the modules 90, 100, 110, 120, and 130 are housed only in the first space 71a among the first space 71a and the second space 75a. The modules 90, 100, 110, 120, and 130 are arranged along the first water channel wall surface 82a. The modules 90, 100, 110, 120, and 130 are arranged in a direction orthogonal to the height direction Z.

[0114] The first inverter module 100 is provided at a position adjacent to each of the first capacitor module 120 and the second inverter module 110. The second capacitor module 130 is provided at a position adjacent to each of the first capacitor module 120 and the second inverter module 110. For example, the first inverter module 100 and the second inverter module 110 are arranged side by side in the width direction X so as to be adjacent to each other. The first capacitor module 120 and the second capacitor module 130 are arranged side by side in the width direction X so as to be adjacent to each other. The first inverter module 100 and the first capacitor module 120 are arranged side by side in the depth direction Y so as to be adjacent to each other. The second inverter module 110 and the second capacitor module 130 are arranged side by side in the depth direction Y so as to be adjacent to each other.

[0115] The switching module 90 is provided at a position adjacent to at least one of the first capacitor module 120 and the second capacitor module 130. For example, one of the first capacitor module 120 and the second capacitor module 130 and the switching module 90 are arranged side by side in the depth direction Y so as to be adjacent to each other. In the present embodiment, the switching module 90 and the second capacitor module 130 are provided at adjacent positions. The switching module 90 is provided on the side opposite to the inverter modules 100 and 110 via the capacitor modules 120 and 130. For example, the switching module 90 is provided on the side opposite to the second inverter module 110 with the second capacitor module 130 interposed therebetween.

[0116] Note that between two modules provided at adjacent positions among the modules 90, 100, 110, 120, and 130, there may be a current sensor, wirings 141 to 146, and the like.

[0117] The output connector 150 is housed in the first space 71a. The output connector 150 is provided at a position adjacent to the inverter modules 100 and 110. At least a part of the output connector 150 is provided at a position aligned with at least one of the first inverter module 100 and the second inverter module 110 in the orthogonal direction orthogonal to the alignment direction of the inverter modules 100 and 110. For example, the output connector 150 is arranged side by side in the depth direction Y with respect to both the first inverter module 100 and the second inverter module 110. The output connector 150 is provided so as to span between the first inverter module 100 and the second inverter module 110 in the width direction X. The output connector 150 is provided at a position adjacent to each of the first inverter module 100 and the second inverter module 110. Note that a wiring member, a current sensor, and the like may be provided between the output connector 150 and the inverter modules 100 and 110. In the present embodiment, the width direction X corresponds to the alignment direction of the inverter modules 100 and 110, and the depth direction Y corresponds to the orthogonal direction.

[0118] The output connector 150 is provided on the side opposite to the capacitor modules 120 and 130 via the inverter modules 100 and 110. In the depth direction Y, a switching module 90 is provided between one of the pair of first width walls 72x and the capacitor modules 120 and 130. An output connector 150 is provided between the other and the inverter modules 100 and 110. In the depth direction Y, output terminals 106 and 116 are provided between the output connector 150 and the switch protection parts 103 and 113.

[0119] The output connector 150 is provided in a direction extending in the height direction Z. In the output connector 150, an output plate surface 151a extends in a direction orthogonal to the depth direction Y. In the output connector 150, an output opposing surface 151b extends in a direction orthogonal to the height direction Z. The output opposing surface 151b faces the side of the motor connector 25 in the height direction Z. The output connector 150 is in a state of being overlapped with one of the first width walls 72x. In the output connector 150, a plurality of connector terminals 26 are arranged in the width direction X along the first width wall 72x.

[0120] The inverter modules 100 and 110 extend in a direction orthogonal to the height direction Z. The drive substrates 171 and 172 extend in a direction orthogonal to the height direction Z. The first inverter module 100 and the first drive substrate 171 are arranged in the height direction Z. The first drive substrate 171 is in a state of being overlapped with the first inverter module 100. The first inverter module 100 is provided between the water channel wall 82 and the first drive substrate 171 in the height direction Z. The second inverter module 110 and the second drive substrate 172 are arranged in the height direction Z. The second drive substrate 172 is in a state of being overlapped with the second inverter module 110. The second inverter module 110 is provided between the water channel wall 82 and the second drive substrate 172 in the height direction Z.

[0121] The inverter modules 100 and 110 are provided such that the P terminals 104 and 114, and the N terminals 105 and 115 are arranged in a depth direction Y in parallel with the output terminals 106 and 116. In the inverter modules 100 and 110, the P terminals 104 and 114, and the N terminals 105 and 115 are on the side of the capacitor modules 120 and 130. The P terminals 104 and 114, and the N terminals 105 and 115 are between the switch protection parts 103 and 113 and the capacitor modules 120 and 130 in the depth direction Y. In the inverter modules 100 and 110, the output terminals 106 and 116 are on the side of the output connector 150. The output terminals 106 and 116 are between the switch protection parts 103 and 113 and the output connector 150 in the depth direction Y.

[0122] The control board 174 extends in a direction orthogonal to the height direction Z. At least a part of the control board 174 is provided at a position arranged in the height direction Z with respect to at least one of the first drive board 171 and the second drive board 172. The control board 174 is in a state of being overlapped on one of the first drive board 171 and the second drive board 172. For example, the control board 174 and the second drive board 172 are arranged in the height direction Z. The control board 174 is provided on the side opposite to the water channel wall 82 via the second inverter module 110 and the second drive board 172 in the height direction Z.

[0123] The switching module 90 extends in a direction orthogonal to the height direction Z. The switching drive board 173 extends in a direction orthogonal to the height direction Z. The switching module 90 and the switching drive board 173 are arranged in the height direction Z. The switching drive board 173 is in a state of being overlapped on the switching module 90. The switching module 90 is provided between the water channel wall 82 and the switching drive board 173 in the height direction Z. The switching module 90 is provided such that the first switching P terminal 94 and the second switching P terminal 95 are arranged in a width direction X in parallel.

[0124] The water channel wall 82 is provided with a first wiring hole 85a as a water channel wall hole 85. The first wiring hole 85a is a hole for inserting a wiring member. A wiring member for forming the P line 12p, a wiring member for forming the N line 12n, etc. are inserted into the first wiring hole 85a. The wiring member inserted into the first wiring hole 85a is connected to the switching module 90 and the capacitor module 120. The first wiring hole 85a is provided at a position close to the first switching P terminal 94 among the first switching P terminal 94 and the second switching P terminal 95.

[0125] The water channel 81 imparts a cooling effect by the refrigerant to the first space 71a. In the first space 71a, the cooling effect by the refrigerant is imparted to the modules 90, 100, 110, 120, 130, the output connector 150, the wirings 143 to 146, etc. At least one of the modules 90, 100, 110, 120, 130 is provided at a position aligned in the height direction Z with respect to the water channel 81. For example, the switching module 90 and the inverter modules 100, 110 are at positions overlapping in the height direction Z with respect to the water channel 81.

[0126] The water channel 81 has a first inverter path 81a, a second inverter path 81b, and a switching path 81c. The first inverter path 81a is a portion of the water channel 81 that overlaps the first inverter module 100. The first inverter path 81a is at a position overlapping at least the first upper switch portion 101 and the first lower switch portion 102. The second inverter path 81b is a portion of the water channel 81 that overlaps the second inverter module 110. The second inverter path 81b is at a position overlapping at least the second upper switch portion 111 and the second lower switch portion 112. The switching path 81c is a portion of the water channel 81 that overlaps the switching module 90. The switching path 81c is at a position overlapping at least the P switch 61. In the water channel 81, the first inverter path 81a, the second inverter path 81b, and the switching path 81c are arranged in the flow direction of the refrigerant. The flow direction of the refrigerant is the direction in which the first water channel opening 811 and the second water channel opening 812 are arranged in the water channel 81.

[0127] The refrigerant flowing through the water passage 81 passes through one of the first inverter passage 81a and the second inverter passage 81b and then passes through the other. That is, the refrigerant flowing through the water passage 81 reaches one of the first inverter module 100 and the second inverter module 110 and then reaches the other. For example, in a configuration where the refrigerant flows through the water passage 81 such that the first water passage port 811 is the inlet, the refrigerant reaches the second inverter module 110 in the water passage 81 and then reaches the first inverter module 100. Also, in a configuration where the refrigerant flows through the water passage 81 such that the second water passage port 812 is the inlet, the refrigerant reaches the first inverter module 100 in the water passage 81 and then reaches the second inverter module 110.

[0128] Further, the refrigerant flowing through the water passage 81 passes through the first inverter passage 81a, the second inverter passage 81b, and the switching passage 81c in order, one by one. That is, the refrigerant flowing through the water passage 81 reaches the first inverter module 100, the second inverter module 110, and the switching module 90 in order, one by one. For example, in a configuration where the refrigerant flows through the water passage 81 such that the first water passage port 811 is the inlet, the refrigerant reaches the switching module 90 in the water passage 81, then reaches the second inverter module 110, and then reaches the first inverter module 100. Also, in a configuration where the refrigerant flows through the water passage 81 such that the second water passage port 812 is the inlet, the refrigerant reaches the first inverter module 100 in the water passage 81, then reaches the second inverter module 110, and then reaches the switching module 90.

[0129] As shown in FIGS. 4 and 5, the filter component 180 is housed in the second space 75a. A plurality of filter components 180 are arranged along the second water passage wall surface 82b. For example, the plurality of filter components 180 are arranged in the depth direction Y along the second depth wall 76y as a whole.

[0130] The input connector 160 is housed in the second space 75a. The input connector 160 is provided in a direction orthogonal to the height direction Z. In the input connector 160, the input connector case 161 penetrates the second outer peripheral wall 76 so that the input facing surface 161b is exposed to the outside of the inverter housing 70. For example, the input connector case 161 penetrates the second width wall 76x in the depth direction Y. The input facing surface 161b extends in a direction orthogonal to the depth direction Y. The input connector 160 is provided on the side opposite to the first wiring hole 85a via the filter component group 180G. The input connector 160 is provided between one of the pair of second width walls 76x and the filter component group 180G in the depth direction Y.

[0131] At least a part of the filter component group 180G is provided at a position aligned with the switching module 90, the second inverter module 110, and the second capacitor module 130 in the height direction Z. The plurality of filter components 180 include filter components 180 aligned with the switching module 90 in the height direction Z, filter components 180 aligned with the second inverter module 110, and filter components 180 aligned with the second capacitor module 130. As the filter component 180 aligned with the switching module 90 in the height direction Z, there is a filter coil component 181. As the filter component 180 aligned with the second inverter module 110 in the height direction Z, there is a filter capacitor component 182.

[0132] The water channel 81 imparts a cooling effect by the refrigerant to the second space 75a. In the second space 75a, the cooling effect by the refrigerant is imparted to the filter component 180 and the like. At least one of the plurality of filter components 180 is provided at a position aligned with the water channel 81 in the height direction Z. For example, the filter coil component 181 and the filter capacitor component 182 are at positions overlapping the water channel 81 in the height direction Z.

[0133] The water passage 81 has a filter passage 81e. The filter passage 81e is the part of the water passage 81 that overlaps the filter component 180. For example, the water passage 81 has a plurality of filter passages 81e. The plurality of filter passages 81e include a filter coil passage 81e1 and a filter capacitor passage 81e2. The filter coil passage 81e1 is the part that overlaps the filter coil component 181. The filter capacitor passage 81e2 is the part that overlaps the filter capacitor component 182. In the water passage 81, the plurality of filter passages 81e are arranged in the refrigerant flow direction. For example, the filter coil passage 81e1 and the filter capacitor passage 81e2 are arranged in the refrigerant flow direction in the water passage 81.

[0134] The refrigerant flowing through the water passage 81 passes through one of the filter coil passage 81e1 and the filter capacitor passage 81e2 and then passes through the other. That is, the refrigerant reaches one of the filter coil component 181 and the filter capacitor component 182 in the water passage 81 and then reaches the other.

[0135] In the water passage 81, a first water passage port 811 and a second water passage port 812 are arranged in the depth direction Y. The first water passage port 811 is provided on one side of one of the pair of first width walls 72x, and the second water passage port 812 is provided on the other side. For example, the first water passage connector 83 is provided on one of the pair of width walls 72x, 76x, and the second water passage connector 84 is provided on the other. Note that in the water passage 81, the first water passage port 811 and the second water passage port 812 may be arranged in the width direction X. Also, the first water passage connector 83 may be provided on one of the pair of depth walls 72y, 76y, and the second water passage connector 84 may be provided on the other. Further, the first water passage connector 83 may be provided on one of the width walls 72x, 76x and the depth walls 72y, 76y, and the second water passage connector 84 may be provided on the other.

[0136] As shown in FIGS. 3 to 5, among the plurality of components housed in the inverter housing 70, there are two components arranged in the height direction Z via the water channel 81. For example, at least a part of the filter coil component 181 is provided at a position aligned with the switching module 90 via the water channel 81. In the water channel 81, at least a part of the filter coil path 81e1 overlaps with the switching path 81c. At least a part of the filter capacitor component 182 is provided at a position aligned with the second inverter module 110 via the water channel 81. In the water channel 81, at least a part of the filter capacitor path 81e2 overlaps with the second inverter module 110.

[0137] <Component group A> According to the present embodiment described so far, the first inverter module 100, the second inverter module 110, and the switching module 90 are housed in the inverter housing 70 as independent components respectively. In this configuration, the degree of freedom regarding the relative positional relationship among the first inverter module 100, the second inverter module 110, and the switching module 90 can be increased inside the inverter housing 70. Therefore, it is less likely to be necessary to use a dedicated housing as the inverter housing 70 according to the specifications of the first inverter module 100, the second inverter module 110, the switching module 90, etc. Thus, the versatility of the inverter housing 70 can be enhanced in the motor unit 15 and the inverter device 30.

[0138] Assume that in one of the first inverter circuit 40 and the second inverter circuit 50, one of the multiple phases becomes a short-circuited phase. The short-circuited phase is a phase in which both the upper-arm switch and the lower-arm switch among the multiple phases are in an energized state. For example, assume that a short-circuited phase occurs in the second inverter circuit 50. In this case, on the second inverter circuit 50 side, a second circulating current Ic2 (see FIG. 1) may flow due to the power stored in the second smoothing capacitor 32. The second circulating current Ic2 circulates and flows from the second smoothing capacitor 32 through the second upper and lower arm circuits 51 of the short-circuited phase and back to the second smoothing capacitor 32. Note that FIG. 1 illustrates the case where the leftmost second upper and lower arm circuit 51 becomes a short-circuited phase.

[0139] In the inverter device 30, the longer the second circulating path through which the second circulating current Ic2 flows, the more likely the second circulating inductance is to increase. The second circulating inductance is an inductance such as parasitic inductance parasitic in the second circulating path. In the second circulating path, the larger the second circulating inductance, the more likely the surge voltage generated due to the short circuit of the short-circuited phase is to increase. And when a large surge voltage due to the second circulating current Ic2 is applied to the arm switches 52, 53 of the short-circuited phase, there is a concern that an abnormality may occur in the arm switches 52, 53.

[0140] When a short-circuited phase occurs in the second inverter circuit 50, on the first inverter circuit 40 side as well, a first circulating current Ic1 (see FIG. 1) may flow due to the power stored in the first smoothing capacitor 31. The first circulating current Ic1 circulates and flows from the first smoothing capacitor 31 through the second upper and lower arm circuits 51 of the short-circuited phase and back to the first smoothing capacitor 31. The first circulating current Ic1 occurs when the P switch 61 is in an energized state, such as during open-wire driving.

[0141] In the inverter device 30, the longer the first circulation path through which the first circulation current Ic1 flows, the more likely the first circulation inductance is to increase. The first circulation inductance is the inductance such as parasitic inductance parasitic on the first circulation path. In the first circulation path, the larger the first circulation inductance, the more likely the surge voltage generated along with the short circuit of the short - circuit phase is to increase. And when a large surge voltage due to the first circulation current Ic1 is applied to the arm switches 52 and 53 of the short - circuit phase, there is a concern that an abnormality may occur in those arm switches 52 and 53.

[0142] The first circulation path through which the first circulation current Ic1 flows includes the switching P - line 12pc and the switching N - line 12nc. For this reason, the longer the switching P - line 12pc or the switching N - line 12nc, the more likely the first circulation inductance is to increase, and there is a concern that an abnormality in the second upper arm switch 52 and the second lower arm switch 53 due to the surge voltage is more likely to occur.

[0143] Also, when a short - circuit phase occurs in the first inverter circuit 40, the switching P - line 12pc and the switching N - line 12nc are included in the second circulation path through which the second circulation current Ic2 flows. For this reason, the longer the switching P - line 12pc or the switching N - line 12nc, the more likely the second circulation inductance is to increase, and there is a concern that an abnormality in the first upper arm switch 42 and the first lower arm switch 43 due to the surge voltage is more likely to occur.

[0144] In response to these concerns, according to the present embodiment, at least a part of the switching module 90 is arranged beside at least one of the inverter modules 100 and 110 in the depth direction Y orthogonal to the width direction X in which the inverter modules 100 and 110 are arranged. In this configuration, the three modules, namely the first inverter module 100, the second inverter module 110, and the switching module 90, are arranged in a state where they are gathered together. Therefore, it is possible to wire the wiring member so that the path for electrically connecting the first inverter module 100, the second inverter module 110, and the switching module 90 becomes as short as possible. That is, in the inverter housing 70, it is easy to wire the switching P line 12pc and the switching N line 12nc so that they become as short as possible.

[0145] If the switching P line 12pc and the switching N line 12nc are made as short as possible in this way, even if a short-circuit phase occurs in the first inverter circuit 40 or the second inverter circuit 50, the first circulation path and the second circulation path can be made as short as possible. As a result, the first circulation inductance and the second circulation inductance can be made as small as possible, and it is possible to suppress the occurrence of abnormalities in the arm switches 42, 43, 52, and 53 of the short-circuit phase due to the surge voltage. Therefore, by increasing the degree of freedom regarding the relative positional relationship among the first inverter module 100, the second inverter module 110, and the switching module 90, it is possible to suppress the occurrence of abnormalities in the inverter device 30.

[0146] According to this embodiment, the switching module 90 is provided so as to span in the width direction X between the first inverter module 100 and the second inverter module 110. In this configuration, the switching module 90 can be arranged at a position as close as possible to both the first inverter module 100 and the second inverter module 110. Further, in the inverter modules 100 and 110, P terminals 104 and 114 and N terminals 105 and 115 are provided on the side of the switching module 90. The P terminals 104 and 114 and the N terminals 105 and 115 are terminals to which wiring members forming the switching P line 12pc and the switching N line 12nc are connected. Therefore, depending on the positions of the P terminals 104 and 114 and the N terminals 105 and 115, it is possible to make the switching P line 12pc and the switching N line 12nc as short as possible.

[0147] According to this embodiment, the water channel wall 82 is provided so as to partition the first space 71a and the second space 75a and forms the water channel 81. In this configuration, the refrigerant flowing through the water channel 81 can cool or dissipate heat from the first space 71a and the second space 75a. That is, the cooling effect of the refrigerant can be imparted to the inverter modules 100 and 110 and the switching module 90.

[0148] Further, the inverter modules 100 and 110 and the switching module 90 are all provided in the first space 71a. In this configuration, it is possible to wire the wiring members connecting the first inverter module 100, the second inverter module 110, and the switching module 90 only in the first space 71a. Therefore, it is possible to wire the wiring members forming the switching P line 12pc and the switching N line 12nc so as not to penetrate the water channel wall 82. For example, it is not necessary to route this wiring member to penetrate the water channel wall 82 at a position avoiding the water channel 81. Therefore, in the first space 71a, the wiring members can be wired so that the switching P line 12pc and the switching N line 12nc are as short as possible.

[0149] According to this embodiment, two inverter components, which are identical parts, are accommodated in the inverter housing 70. One of the two inverter components is used as the first inverter module 100, and the other is used as the second inverter module 110. In this configuration, it is not necessary to individually set the specifications, size, and shape for each of the first inverter module 100 and the second inverter module 110. By enhancing the versatility of the inverter modules 100 and 110 in this way, the versatility of the inverter device 30 can be enhanced.

[0150] According to this embodiment, in the filter component group 180G accommodated in the inverter housing 70, a plurality of filter components 180 are provided so as to be assembled. In this configuration, the wiring members for connecting the plurality of filter components 180 so as to be energizable can be made as short as possible. Therefore, it is possible to suppress the reduction of the filter effect of the filter circuit 33 due to the lengthening of the P line 12p and the N line 12n connected to the filter circuit 33. Further, in this configuration, the lengths of the P line 12p and the N line 12n with respect to the filter circuit 33 are less likely to vary. Therefore, it is possible to suppress the deterioration of noise such as electromagnetic noise in the filter circuit 33 due to the variation in the lengths of the P line 12p and the N line 12n with respect to the filter circuit 33.

[0151] According to this embodiment, the inverter modules 100 and 110 are provided in the first space 71a, while the filter component group 180G is provided in the second space 75a. With this configuration, it is possible to avoid the situation where the degree of freedom regarding the arrangement of the plurality of filter components 180 in the second space 75a is reduced due to the presence of the inverter modules 100 and 110. For example, in the filter component group 180G, it is possible to suppress the situation where the inverter modules 100 and 110 exist at the positions where the filter components 180 should be arranged and the filter components 180 cannot be arranged at those positions. Therefore, in the filter component group 180G, the plurality of filter components 180 can be arranged so that the filter function of the filter circuit 33 is easily exerted. That is, the filter function of the filter circuit 33 can be enhanced by the arrangement of the filter components 180.

[0152] According to this embodiment, the first inverter circuit 40 is connected to the first coil end 22a, and the second inverter circuit 50 is connected to the second coil end 22b. With this configuration, the motor 20 can be driven in a plurality of driving modes by driving the inverter circuits 40 and 50 and the switching circuit 60. By making it possible to select a plurality of driving modes of the motor 20 in this way, the performance that the multi-phase motor coils 22 can exhibit can be enhanced.

[0153] <Component group B> According to the present embodiment, the refrigerant flowing through the water passage 81 can cool the inverter modules 100 and 110 and the switching module 90. Further, the inverter modules 100 and 110 and the capacitor modules 120 and 130 are provided in the first space 71a. In this configuration, wiring members such as the capacitor wirings 145 and 146 that connect the inverter modules 100 and 110 and the capacitor modules 120 and 130 in an energizable manner can be wired so as not to penetrate the water passage wall 82. In other words, there is no need to wire such that this wiring member penetrates the water passage wall 82 at a position avoiding the water passage 81 and detours. For this reason, it is possible to suppress the increase in inductance due to the lengthening of the wiring member that connects the inverter modules 100 and 110 and the capacitor modules 120 and 130.

[0154] As described above, it is possible to suppress the performance of the inverter circuits 40 and 50 from deteriorating due to temperature rise and increase in inductance in the inverter modules 100 and 110 and the capacitor modules 120 and 130. Therefore, in the motor unit 15 and the inverter device 30, a configuration in which the performance of the inverter circuits 40 and 50 can be easily exhibited can be realized.

[0155] According to the present embodiment, the first inverter module 100 and the first capacitor module 120 are arranged side by side in the depth direction Y along the water passage wall 82 so as to be adjacent to each other. In this configuration, the first inverter module 100 and the first capacitor module 120 are arranged as close as possible without passing through the water passage wall 82. For this reason, wiring members such as the first capacitor wiring 145 that connect the first inverter module 100 and the first capacitor module 120 in an energizable manner can be made as short as possible. Therefore, even if a short-circuited phase occurs in the inverter circuits 40 and 50, it is possible to make the first circulation path as short as possible and reduce the first circulation inductance.

[0156] Further, the second inverter module 110 and the second capacitor module 130 are arranged side by side along the water channel wall 82 so as to be adjacent to each other. In this configuration, the second inverter module 110 and the second capacitor module 130 are arranged at positions as close as possible without passing through the water channel wall 82. For this reason, wiring members such as the second capacitor wiring 146 for connecting the second inverter module 110 and the second capacitor module 130 in an energizable manner can be made as short as possible. Therefore, even if a short-circuit phase occurs in the inverter circuits 40 and 50, it is possible to make the second circulation path as short as possible and reduce the second circulation inductance.

[0157] In the inverter device 30, even if a surge voltage is generated by the switching in the first inverter circuit 40, this surge voltage is reduced by the first smoothing capacitor 31. However, if the energization path connecting the first inverter circuit 40 and the first smoothing capacitor 31 is long, the inductance of this energization path increases, and the effect of the first smoothing capacitor 31 in reducing the surge voltage tends to decrease. On the other hand, according to the present embodiment, since the first inverter module 100 and the first capacitor module 120 are adjacent to each other, the energization path connecting the first inverter circuit 40 and the first smoothing capacitor 31 can be made as short as possible. Then, since the inductance of the energization path is reduced, the effect of reducing the surge voltage by the first smoothing capacitor 31 tends to be enhanced. Therefore, it is possible to suppress the performance of the first inverter circuit 40 from being degraded by the surge voltage.

[0158] Further, in the inverter device 30, even if a surge voltage is generated due to switching in the second inverter circuit 50, this surge voltage is reduced by the second smoothing capacitor 32. However, if the current-carrying path connecting the second inverter circuit 50 and the second smoothing capacitor 32 is long, the inductance of this current-carrying path increases, and the effect of the second smoothing capacitor 32 in reducing the surge voltage tends to decrease. On the other hand, according to the present embodiment, since the second inverter module 110 and the second capacitor module 130 are adjacent to each other, the current-carrying path connecting the second inverter circuit 50 and the second smoothing capacitor 32 can be made as short as possible. Then, since the inductance of the current-carrying path is reduced, the effect of reducing the surge voltage by the second smoothing capacitor 32 is likely to be enhanced. Therefore, it is possible to suppress the performance of the second inverter circuit 50 from being degraded by the surge voltage.

[0159] In the inverter device 30, if the lengths of the current-carrying path connecting the first inverter circuit 40 and the first smoothing capacitor 31 and the current-carrying path connecting the second inverter circuit 50 and the second smoothing capacitor 32 are different, a difference in inductance is likely to occur in these current-carrying paths. When a difference in inductance occurs, a difference in the effect of reducing the surge voltage occurs, and a difference is likely to occur between the performance that the first inverter circuit 40 can exhibit and the performance that the second inverter circuit 50 can exhibit. In this case, the inverter circuit with the lower performance among the first inverter circuit 40 and the second inverter circuit 50 may be in a state where it reduces the performance of the motor 20. For example, when the performance that the first inverter circuit 40 can exhibit is lower than the performance that the second inverter circuit 50 can exhibit, the motor 20 may be in a state of being driven in accordance with the performance of the first inverter circuit 40.

[0160] In contrast, according to the present embodiment, the first inverter module 100 and the first capacitor module 120 are provided adjacent to each other, and the second inverter module 110 and the second capacitor module 130 are provided adjacent to each other. In this configuration, the wiring member can be wired so that the difference in the length of the energization path connecting the first inverter circuit 40 and the first smoothing capacitor 31 and the length of the energization path connecting the second inverter circuit 50 and the second smoothing capacitor 32 becomes as small as possible. Therefore, it is possible to suppress a situation where a difference occurs in the surge voltage reduction effect between the first inverter circuit 40 and the second inverter circuit 50, and the performance of the motor 20 is lowered by the inverter circuit with the lower performance that can be exhibited.

[0161] According to the present embodiment, the first inverter module 100 and the second inverter module 110 are arranged side by side along the water channel wall 82 so as to be adjacent to each other. In this configuration, the first inverter module 100 and the second inverter module 110 are arranged at positions as close as possible without passing through the water channel wall 82. Therefore, the wiring member connecting the first inverter module 100 and the second inverter module 110 can be made as short as possible. That is, the wiring member forming the switching P line 12pc and the switching N line 12nc can be made as short as possible. Therefore, even if a short-circuit phase occurs in the inverter circuits 40 and 50, the first circulating inductance and the second circulating inductance can be reduced because the switching P line 12pc and the switching N line 12nc are short.

[0162] In the drive system 10, the first smoothing capacitor 31 and the second smoothing capacitor 32 are connected so as to be energizable via the inverter circuits 40 and 50. In this configuration, the current flowing through each of the first smoothing capacitor 31 and the second smoothing capacitor 32 may pulsate due to a ripple current or the like. When the current flowing through the first smoothing capacitor 31 and the current flowing through the second smoothing capacitor 32 resonate, there is a concern that the current flowing through the smoothing capacitors 31 and 32 may become too large. As a case where the current flowing through the smoothing capacitors 31 and 32 becomes too large, there is a case where this current exceeds the rated current value of the smoothing capacitors 31 and 32. When the current flowing through the smoothing capacitors 31 and 32 becomes too large, it is considered that abnormalities are likely to occur in the smoothing capacitors 31 and 32.

[0163] And in the drive system 10, when the capacitor path connecting the first smoothing capacitor 31 and the second smoothing capacitor 32 is long, the inductance of the capacitor path tends to increase. The inductance of the capacitor path is parasitic inductance or the like parasitic on the capacitor path. And when the inductance of the capacitor path is large, the current flowing through the first smoothing capacitor 31 and the current flowing through the second smoothing capacitor 32 are likely to resonate.

[0164] On the other hand, according to the present embodiment, the first capacitor module 120 and the second capacitor module 130 are arranged side by side along the water channel wall 82 so as to be adjacent to each other. In this configuration, the first capacitor module 120 and the second capacitor module 130 are arranged at positions as close as possible without passing through the water channel wall 82. For this reason, the wiring member connecting the first capacitor module 120 and the second capacitor module 130 can be made as short as possible. That is, the capacitor path can be made as short as possible. By making the capacitor path as short as possible in this way, the inductance of the capacitor path is reduced, so that it is possible to suppress the resonance between the current flowing through the first smoothing capacitor 31 and the current flowing through the second smoothing capacitor 32. Therefore, it is possible to suppress the current flowing through the smoothing capacitors 31 and 32 from becoming too large due to the resonance of the current.

[0165] In addition, since the wiring members connecting the inverter modules 100 and 110 and the wiring members connecting the capacitor modules 120 and 130 are shortened, heat generated by these wiring members can be reduced. Therefore, it is possible to suppress the performance of the inverter circuits 40 and 50 from deteriorating due to heat generated by the wiring members.

[0166] According to the present embodiment, the water channel 81 is provided such that the refrigerant reaches one of the first inverter module 100 and the second inverter module 110 and then reaches the other. In this configuration, when cooling the inverter modules 100 and 110 with the refrigerant, it is not necessary to form a branch portion where the refrigerant branches or a confluence portion where the refrigerant merges in the water channel 81. Therefore, it is possible to suppress the refrigerant from flowing less easily through the water channel 81 and the cooling effect of the inverter modules 100 and 110 by the refrigerant from deteriorating.

[0167] According to the present embodiment, the switching module 90 is provided in the first space 71a together with the inverter modules 100 and 110 and the capacitor modules 120 and 130. In this configuration, the positional relationship between the switching module 90 and the inverter modules 100 and 110 can be set so that the switching P line 12pc becomes as short as possible. Therefore, the wiring members connecting the inverter modules 100 and 110 and the wiring members connecting the capacitor modules 120 and 130 can be made as short as possible. Therefore, it is possible to reduce the circulating inductance when a short-circuit phase occurs and suppress the current resonance of the smoothing capacitors 31 and 32.

[0168] In addition, in this configuration, it is possible to wire the wiring members connecting the switching module 90 to the inverter modules 100 and 110 and the capacitor modules 120 and 130 so as not to penetrate the water channel wall 82. For example, it is not necessary to detour the wiring members extending from the switching module 90 to penetrate the water channel wall 82 at a position avoiding the water channel 81. Therefore, the wiring members connecting the switching module 90 to the inverter modules 100 and 110 and the capacitor modules 120 and 130 can be made as short as possible.

[0169] According to the present embodiment, the water passage 81 is provided such that the refrigerant reaches each of the first inverter module 100, the second inverter module 110, and the switching module 90 in order. In this configuration, when cooling the inverter modules 100 and 110 and the switching module 90 with the refrigerant, it is not necessary to form a branch portion where the refrigerant branches or a confluence portion where the refrigerant converges in the water passage 81. Therefore, it is possible to suppress the situation where the refrigerant becomes difficult to flow through the water passage 81 and the cooling effect of the inverter modules 100 and 110 and the switching module 90 by the refrigerant decreases.

[0170] According to the present embodiment, the inverter modules 100 and 110 and the capacitor modules 120 and 130 are provided in the first space 71a, while the filter component group 180G is provided in the second space 75a. In this configuration, it is possible to avoid the situation where the degree of freedom regarding the arrangement of the plurality of filter components 180 in the second space 75a is reduced due to the presence of the inverter modules 100 and 110 and the capacitor modules 120 and 130. For example, in the filter component group 180G, it is possible to suppress the situation where the capacitor modules 120 and 130 exist at the position where the filter component 180 should be arranged and the filter component 180 cannot be arranged at that position.

[0171] According to the present embodiment, at least one of the filter coil component 181 and the filter capacitor component 182 is provided at a position overlapping the water passage 81. In this configuration, the cooling effect by the refrigerant can be imparted to the filter coil component 181 and the filter capacitor component 182. Therefore, it is possible to suppress the situation where the temperature of the filter coil component 181 and the filter capacitor component 182 rises and the filter function of the filter circuit 33 deteriorates.

[0172] <Component group D> According to the present embodiment, at least a part of the output connector 150 is provided at a position aligned with at least one of the first inverter module 100 and the second inverter module 110 in the depth direction Y. With this configuration, it is possible to arrange the output connector 150 so that the difference between the length of the first output line 12oa and the length of the second output line 12ob is minimized. For example, the difference between the length of the wiring member connecting the output connector 150 and the first inverter module 100 and the length of the wiring member connecting the output connector 150 and the second inverter module 110 can be minimized. Therefore, it is possible to suppress the situation where the difference between the length of the first output line 12oa and the length of the second output line 12ob becomes large, and the difference between the inductance with respect to the first inverter circuit 40 and the inductance with respect to the second inverter circuit 50 becomes large. Accordingly, it is possible to suppress the situation where the performance of the inverter circuit with the larger inductance among the first inverter circuit 40 and the second inverter circuit 50 is not properly exhibited. Thereby, a configuration in which the respective performances of the first inverter circuit 40 and the second inverter circuit 50 are easily exhibited can be realized.

[0173] The inductance with respect to the first inverter circuit 40 includes the inductance of the first output line 12oa. The inductance of the first output line 12oa includes parasitic inductance parasitic on the first output line 12oa. In the inverter device 30, the larger the inductance of the first output line 12oa, the more likely the performance that the first inverter circuit 40 can exhibit is to decrease. That is, the longer the wiring member forming the first output line 12oa, the more likely the performance that the first inverter circuit 40 can exhibit is to decrease. The inductance of the second output line 12ob includes parasitic inductance parasitic on the second output line 12ob. In the inverter device 30, the larger the inductance of the second output line 12ob, the more likely the performance that the second inverter circuit 50 can exhibit is to decrease. That is, the longer the wiring member forming the second output line 12ob, the more likely the performance that the second inverter circuit 50 can exhibit is to decrease.

[0174] In this embodiment, at least a part of the output connector 150 is arranged at a position aligned with at least one of the inverter modules 100 and 110 in the depth direction Y, so that the wiring member can be wired so that the output lines 12oa and 12ob are as short as possible. With this configuration, since the inductance with respect to the inverter circuits 40 and 50 is likely to be reduced, the performance that the inverter circuits 40 and 50 can exhibit can be enhanced.

[0175] According to this embodiment, the output connector 150 is provided at a position adjacent to each of the first inverter module 100 and the second inverter module 110. With this configuration, the output connector 150 can be arranged at a position as close as possible to both the first inverter module 100 and the second inverter module 110. For this reason, the lengths of the wiring members connecting the output connector 150 and the first inverter module 100 and the output connector 150 and the second inverter module 110 can be made as short as possible, respectively. Therefore, each of the first output line 12oa and the second output line 12ob can be made as short as possible.

[0176] According to this embodiment, the first inverter module 100 and the second inverter module 110 are arranged side by side along the output board surface 151a. With this configuration, the plurality of output connector terminals 152 of the output connector 150 are arranged along the output board surface 151a, so that they are arranged in the width direction X, which is the arrangement direction of the inverter modules 100 and 110. For this reason, it is possible to suppress the distance between the output connector terminal 152 and the inverter modules 100 and 110 from being significantly different for each of the plurality of output connector terminals 152. Therefore, the difference between the length of the wiring member connecting the output connector 150 and the first inverter module 100 and the length of the wiring member connecting the output connector 150 and the second inverter module 110 can be made as small as possible.

[0177] According to this embodiment, the first connector terminal 152a and the second connector terminal 152b are arranged in the width direction X in which the first inverter module 100 and the second inverter module 110 are aligned. In this configuration, in the output connector 150, it is easy to arrange the first connector terminal 152a connected to the first inverter module 100 at a position close to the first inverter module 100. Also, it is easy to arrange the second connector terminal 152b connected to the second inverter module 110 at a position close to the second inverter module 110. Therefore, the difference between the length of the wiring member connecting the first connector terminal 152a and the first inverter module 100 and the length of the wiring member connecting the second connector terminal 152b and the second inverter module 110 can be minimized as much as possible. Thus, due to the positional relationship between the first connector terminal 152a and the second connector terminal 152b, the difference between the length of the first output line 12oa and the length of the second output line 12ob can be minimized as much as possible.

[0178] According to this embodiment, in the inverter modules 100 and 110, the output terminals 106 and 116 are provided between the switch protection portions 103 and 113 and the output connector 150 in the depth direction Y. In this configuration, the output terminals 106 and 116 can be arranged at positions as close as possible to the output connector 150. Therefore, the wiring member connecting the output terminals 106 and 116 and the output connector 150 can be made as short as possible. Also, in this configuration, both the first output terminal 106 and the second output terminal 116 can be arranged at positions as close as possible to the output connector 150. Therefore, the difference between the length of the wiring member connecting the first output terminal 106 and the output connector 150 and the length of the wiring member connecting the second output terminal 116 and the output connector 150 can be minimized as much as possible.

[0179] According to this embodiment, the output connector 150 is provided so as to span in the width direction X between the first inverter module 100 and the second inverter module 110. In this configuration, it is possible to achieve both arranging the first connector terminal 152a as close as possible to the first inverter module 100 and arranging the second connector terminal 152b as close as possible to the second inverter module 110.

[0180] According to this embodiment, the output connector 150 and the inverter modules 100 and 110 are arranged along the water channel wall 82. In this configuration, it is possible to realize a configuration in which the cooling effect of the refrigerant flowing through the water channel 81 is easily applied to the output connector 150 and the inverter modules 100 and 110. Further, in this configuration, it is possible to realize a configuration in which the cooling effect of the refrigerant is easily applied to the wiring member connecting the output connector 150 and the inverter modules 100 and 110.

[0181] According to this embodiment, the output connector 150 is provided in the first space 71a together with the inverter modules 100 and 110. In this configuration, it is possible to wire the wiring member connecting the output connector 150 and the inverter modules 100 and 110 so as not to penetrate the water channel wall 82. Therefore, the wiring member can be wired so that the first output line 12oa and the second output line 12ob are as short as possible.

[0182] According to this embodiment, the output connector 150 is provided on the side opposite to the capacitor modules 120 and 130 via the inverter modules 100 and 110 in the depth direction Y. In this configuration, it is not necessary to wire the wiring member connecting the output connector 150 and the inverter modules 100 and 110 to bypass the capacitor modules 120 and 130. For this reason, due to the positional relationship between the output connector 150 and the capacitor modules 120 and 130, the wiring member can be wired so that the first output line 12oa and the second output line 12ob are as short as possible.

[0183] <Second Embodiment> In the first embodiment described above, the first inverter module 100 and the second inverter module 110 are arranged side by side in the width direction X. In contrast, in the second embodiment, the first inverter module 100 and the second inverter module 110 are arranged side by side in the depth direction Y. Regarding the configurations, operations, and effects not particularly described in the second embodiment, they are the same as those in the first embodiment. In the second embodiment, the description will focus on the differences from the first embodiment.

[0184] As shown in FIGS. 6 and 8, the first inverter module 100 and the second inverter module 110 are arranged side by side in the depth direction Y so as to be adjacent to each other. The first capacitor module 120 and the second capacitor module 130 are arranged side by side in the depth direction Y so as to be adjacent to each other. The first inverter module 100 and the first capacitor module 120 are arranged side by side in the width direction X so as to be adjacent to each other. The second inverter module 110 and the second capacitor module 130 are arranged side by side in the width direction X so as to be adjacent to each other.

[0185] The switching module 90 and the first capacitor module 120 are arranged side by side in the width direction X so as to be adjacent to each other. The switching module 90 is provided on the opposite side of the inverter modules 100 and 110 via the capacitor modules 120 and 130 in the width direction X. The switching module 90 is provided at a position adjacent to the first capacitor module 120. The first capacitor module 120 is provided between the first inverter module 100 and the switching module 90.

[0186] The output connector 150 is provided on the opposite side of one of the first inverter module 100 and the second inverter module 110 via the other in the depth direction Y. For example, the output connector 150 is provided on the opposite side of the second inverter module 110 via the first inverter module 100. In this embodiment, the depth direction Y corresponds to the arrangement direction of the inverter modules 100 and 110, and the width direction X corresponds to the orthogonal direction.

[0187] At least a part of the output connector 150 is provided at a position aligned in the depth direction Y with respect to both the first inverter module 100 and the second inverter module 110. The output connector 150 protrudes from the inverter modules 100, 110 to one side in the width direction X. For example, the output connector 150 protrudes from the inverter modules 100, 110 to the side of the first depth wall 72y. The output connector 150 is provided at a position separated from the capacitor modules 120, 130 in the width direction X. Further, the output connector 150 is provided at a position separated from the switching module 90 in the width direction X.

[0188] The inverter modules 100, 110 are provided such that the P terminals 104, 114 and the N terminals 105, 115 and the output terminals 106, 116 are aligned in the width direction X. The P terminals 104, 114 and the N terminals 105, 115 are located between the switch protection parts 103, 113 and the capacitor modules 120, 130 in the width direction X. The output terminals 106, 116 are located between the switch protection parts 103, 113 and the first depth wall 72y in the width direction X. The output terminals 106, 116 are arranged in the depth direction Y along the first depth wall 72y. The output connector 150 is provided at a position aligned in the depth direction Y with respect to the output terminals 106, 116.

[0189] The switching module 90 is provided such that the first switching P terminal 94 and the second switching P terminal 95 are aligned in the depth direction Y.

[0190] As shown in FIGS. 7 and 8, the filter component group 180G is provided so as to span in the depth direction Y between the first inverter module 100 and the second inverter module 110. The plurality of filter components 180 are arranged in the depth direction Y in which the first inverter module 100 and the second inverter module 110 are arranged side by side. The plurality of filter components 180 include a filter component 180 aligned with the first inverter module 100 in the height direction Z and a filter component 180 aligned with the second inverter module 110. As the filter component 180 aligned with the first inverter module 100 in the height direction Z, there is a filter capacitor component 182. As the filter component 180 aligned with the second inverter module 110 in the height direction Z, there is a filter coil component 181.

[0191] In addition to the inverter paths 81a and 81b and the switching path 81c, the water channel 81 has a first capacitor path 81f and an output wiring path 81h. The first capacitor path 81f is a portion of the water channel 81 that overlaps the first capacitor module 120. In the first capacitor path 81f, the cooling effect by the refrigerant is easily imparted to the first capacitor module 120. The output wiring path 81h is a portion of the water channel 81 that overlaps the output wirings 143 and 144. In the output wiring path 81h, the cooling effect by the refrigerant is easily imparted to the output wirings 143 and 144.

[0192] <Component group A> According to the present embodiment, the filter component group 180G is provided so as to span in the depth direction Y between the first inverter module 100 and the second inverter module 110. In this configuration, as a space for installing the filter component group 180G, a space as wide as the first inverter module 100 and the second inverter module 110 are arranged side by side can be secured. Therefore, it is possible to suppress the situation where the installation space of the filter component group 180G is insufficient and the plurality of filter components 180 cannot be arranged so that the filter function of the filter circuit 33 is exhibited.

[0193] <Component group E> According to the present embodiment, the output connector 150 is provided on the side opposite to the other via one of the first inverter module 100 and the second inverter module 110 in the depth direction Y. In this configuration, it is possible to arrange the output connector 150 so that the path to the motor coil 22 is shortened for the inverter module that is more likely to have its performance degraded due to heat generation or the like among the first inverter module 100 and the second inverter module 110. For this reason, it is possible to suppress the further degradation of the performance that can be exhibited by increasing the inductance or heat generation with respect to the motor coil 22 for the inverter module that is more likely to have its performance degraded among the inverter modules 100 and 110. Therefore, a configuration in which the performance of the first inverter module 100 and the second inverter module 110 is easily exhibited can be realized.

[0194] Examples of the inductance with respect to the motor coil 22 include the inductance of the output line 12o. The larger the inductance of the output line 12o, the more likely the inductance with respect to the motor coil 22 is to increase.

[0195] Examples of the heat generation with respect to the motor coil 22 include the heat generated in the output line 12o. In the inverter device 30, the greater the heat generated in the first output line 12oa, the more likely the performance that the first inverter circuit 40 can exhibit with respect to the motor 20 is to degrade. The longer the wiring member forming the first output line 12oa, the more likely the heat of the first output line 12oa is to be generated. Also, the greater the heat generated in the second output line 12ob, the more likely the performance that the second inverter circuit 50 can exhibit with respect to the motor 20 is to degrade. The longer the wiring member forming the second output line 12ob, the more likely the heat of the second output line 12ob is to be generated.

[0196] In this embodiment, the output connector 150 is provided on the side opposite to the second inverter module 110 via the first inverter module 100. With this configuration, since the wiring member connecting the output connector 150 and the first inverter module 100 can be made as short as possible, it is possible to suppress the performance of the first inverter circuit 40 from deteriorating due to the inductance of the wiring member. Therefore, it is possible to suppress an increase in the difference between the performance that the first inverter circuit 40 can exhibit and the performance that the second inverter circuit 50 can exhibit.

[0197] In the inverter device 30, it is conceivable that a difference occurs in the performance that can be exhibited by the first inverter circuit 40 and the second inverter circuit 50 depending on the driving state of the motor 20 or the like. For example, when the driving state of the motor 20 is star connection driving, it is conceivable that the performance of the first inverter circuit 40 deteriorates due to heat generation or the like of the first inverter module 100, and the first inverter circuit 40 may reduce the performance of the motor 20.

[0198] On the other hand, according to this embodiment, the output connector 150 is provided at a position close to the first inverter module 100. With this configuration, it is possible to suppress the performance of the first inverter circuit 40 from deteriorating due to the inductance of the wiring member connecting the output connector 150 and the first inverter module 100 by making the wiring member as short as possible. Therefore, even if the performance that the first inverter circuit 40 can exhibit deteriorates due to star connection driving or the like, it is possible to improve the state in which the first inverter circuit 40 reduces the performance of the motor 20.

[0199] According to this embodiment, at least a part of the output connector 150 is provided at a position aligned in the depth direction Y with respect to both the first inverter module 100 and the second inverter module 110. With this configuration, the output connector 150 can be arranged at a position as close as possible to one of the inverter modules 100 and 110. For this reason, by arranging the output connector 150 on the side of the inverter module that is more likely to have degraded performance among the inverter modules 100 and 110, the wiring member connecting the inverter module and the output connector 150 can be made as short as possible.

[0200] According to this embodiment, in the output connector 150, the output plate surface 151a extends in a direction orthogonal to the depth direction Y. With this configuration, depending on the orientation of the output plate surface 151a, the space in which the output connector 150 and the inverter modules 100 and 110 are installed can be made as small as possible in the depth direction Y. For this reason, the dimensions of the inverter housing 70 in the depth direction Y can be reduced.

[0201] According to this embodiment, in the output connector 150, the first connector terminal 152a and the second connector terminal 152b are arranged side by side in the width direction X. With this configuration, depending on the arrangement direction of the first connector terminal 152a and the second connector terminal 152b, the space in which the output connector 150 and the inverter modules 100 and 110 are installed can be made as small as possible in the depth direction Y.

[0202] According to this embodiment, in the first inverter module 100, a plurality of first output terminals 106 are arranged in the depth direction Y. In the second inverter module 110, a plurality of second output terminals 116 are arranged in the depth direction Y. With this configuration, in the depth direction Y, the plurality of first output terminals 106 and the plurality of second output terminals 116 can be arranged at positions separated from each other. Therefore, even if heat is generated from the first output terminal 106 or the second output terminal 116, it is less likely that heat will accumulate in the space where the first output terminal 106 or the second output terminal 116 is installed. Accordingly, it is possible to suppress the performance that the inverter modules 100 and 110 can exhibit from being degraded by the heat of the first output terminal 106 or the second output terminal 116.

[0203] <Third Embodiment> In the first embodiment described above, the inverter modules 100 and 110 and the capacitor modules 120 and 130 are provided in one of the first space 71a and the second space 75a. In contrast, in the third embodiment, the first inverter module 100 is provided in one of the first space 71a and the second space 75a, and the second capacitor module 130 is provided in the other. Regarding the configuration, operation, and effects not particularly described in the third embodiment, they are the same as those in the first embodiment described above. In the third embodiment, the description will be centered on the points different from the first embodiment.

[0204] As shown in FIGS. 9 and 10, the first inverter module 100 is provided in the first space 71a, and the second capacitor module 130 is provided in the second space 75a. As shown in FIG. 9, the first inverter module 100 and the first capacitor module 120 are provided in the first space 71a. The first inverter module 100 and the first capacitor module 120 are arranged along the first water channel wall surface 82a so as to be adjacent to each other. The first inverter module 100 and the first capacitor module 120 are provided at a position closer to the other than one of the pair of first depth walls 72y. The first inverter module 100 and the first capacitor module 120 are arranged along one of the first depth walls 72y.

[0205] The switching module 90 is arranged in parallel with the first inverter module 100 in the width direction X. The switching module 90 and the first inverter module 100 are arranged along the first width wall 72x so as to be adjacent to each other. The switching module 90 is provided at a position close to the first depth wall 72y on the side opposite to the first inverter module 100 among the pair of first depth walls 72y. The switching module 90 is provided in a direction in which the first switching P terminal 94 and the second switching P terminal 95 are arranged in the depth direction Y, similar to the above-described second embodiment.

[0206] As shown in FIGS. 9 and 11, the control board 174 is in a state of being overlapped with the switching drive board 173. At least a part of the control board 174 is arranged in parallel with the switching drive board 173 in the height direction Z. For example, the control board 174 is in a state of covering the entire switching drive board 173 from the side opposite to the water channel wall 82 in the height direction Z. The control board 174 is provided on the side opposite to the water channel wall 82 via the switching module 90 and the switching drive board 173 in the height direction Z.

[0207] The output connector 150 is arranged in parallel with the first inverter module 100 and the first capacitor module 120 in the depth direction Y. The output connector 150 is provided on the side opposite to the first capacitor module 120 via the first inverter module 100. The output connector 150, the first inverter module 100, and the first capacitor module 120 are arranged along the first depth wall 72y.

[0208] As shown in FIG. 10, the second inverter module 110 and the second capacitor module 130 are provided in the second space 75a. The second inverter module 110 and the second capacitor module 130 are arranged in parallel with each other along the second water channel wall surface 82b in the depth direction Y. The second inverter module 110 and the second capacitor module 130 are arranged along the second depth wall 76y.

[0209] As shown in FIGS. 9, 10, and 11, the first inverter module 100 and the second inverter module 110 are arranged in the height direction Z via the water channel wall 82. The first inverter module 100 and the second inverter module 110 are in a state of overlapping each other via the water channel wall 82. The first capacitor module 120 and the second capacitor module 130 are arranged in the height direction Z via the water channel wall 82. The first capacitor module 120 and the second capacitor module 130 are in a state of overlapping each other via the water channel wall 82.

[0210] In the first inverter module 100 and the second inverter module 110, the directions in which the P terminals 104, 114 and the N terminals 105, 115 and the output terminals 106, 116 are arranged are the same. For example, the P terminals 104, 114 and the N terminals 105, 115 and the output terminals 106, 116 are arranged in the depth direction Y. The region where the first P terminal 104 and the first N terminal 105 are located in the first inverter module 100 and the region where the second P terminal 114 and the second N terminal 115 are located in the second inverter module 110 are arranged in the height direction Z via the water channel wall 82. Also, the region where a plurality of first output terminals 106 are located in the first inverter module 100 and the region where a plurality of second output terminals 116 are located in the second inverter module 110 are arranged in the height direction Z via the water channel wall 82.

[0211] The output connector 150 is in a state of extending in the height direction Z in which the first inverter module 100 and the second inverter module 110 are arranged. At least a part of the output connector 150 is arranged in the first inverter module 100. The output connector 150 is provided at a position shifted from the second inverter module 110 toward the first inverter module 100 in the height direction Z. In the present embodiment, the height direction Z corresponds to the arrangement direction of the inverter modules 100, 110, and the depth direction Y corresponds to the orthogonal direction.

[0212] As shown in FIGS. 9 and 10, the water channel wall 82 is provided with a water channel wall hole 85, which includes a second wiring hole 85b, a third wiring hole 85c, and a fourth wiring hole 85d. The wiring holes 85b to 85d are holes for inserting wiring members. A wiring member forming the output line 12o or the like is inserted into the second wiring hole 85b. For example, the second output wiring 144 is inserted into the second wiring hole 85b. The second output wiring 144 is wired so as to be connected between the second connector terminal 152b and the second output terminal 116 by being inserted into the second wiring hole 85b.

[0213] A wiring member forming the P line 12p, a wiring member forming the N line 12n, a wiring member forming the output line 12o, etc. are inserted into the third wiring hole 85c. For example, a wiring member connecting the first inverter module 100 and the second inverter module 110 via the switching module 90 is inserted into the third wiring hole 85c. The wiring member inserted into the third wiring hole 85c includes a wiring member connecting the first capacitor module 120 and the second capacitor module 130. The third wiring hole 85c is provided at a position where the wiring member connecting the first inverter module 100 and the second inverter module 110 and the wiring member connecting the first capacitor module 120 and the second capacitor module 130 can be made as short as possible.

[0214] A wiring member used for communication or the like is inserted into the fourth wiring hole 85d. For example, a wiring member communicably connecting the control board 174 and the second drive board 172 is inserted into the fourth wiring hole 85d.

[0215] As shown in FIGS. 9 and 11, the filter component 180 is housed in the first space 71a. A plurality of filter components 180 are arranged along the first water channel wall surface 82a. For example, the plurality of filter components 180 are arranged in the width direction X and the depth direction Y along the first width wall 72x and the first depth wall 72y as a whole. The filter component group 180G extends along the first outer peripheral wall 72 as a whole.

[0216] The input connector 160 is housed in the first space 71a. The input connector 160 is provided on the opposite side of the output connector 150 via the first inverter module 100 and the first capacitor module 120 in the depth direction Y. The input connector 160 is arranged in a state of being aligned with the filter component group 180G in the width direction X. The input connector 160 penetrates the first depth wall 72y in the width direction X.

[0217] In the water channel 81, at least a part of the first inverter path 81a overlaps the second inverter path 81b. In the water channel 81, the part between the first inverter module 100 and the second inverter module 110 in the height direction Z is included in both the first inverter path 81a and the second inverter path 81b.

[0218] <Component group A> According to the present embodiment, the first inverter module 100 and the switching module 90 are provided in the first space 71a, and the second inverter module 110 is provided in the second space 75a. In this configuration, the heat of the three components, namely the inverter modules 100, 110 and the switching module 90, is not released only to one of the first space 71a and the second space 75a. Therefore, it is possible to suppress the situation where the cooling effect by the refrigerant is insufficient in one of the first space 71a and the second space 75a.

[0219] <Component group C> According to the present embodiment, since there is a water channel 81 between the first space 71a and the second space 75a, the cooling effect of the refrigerant can be imparted to both the first inverter module 100 in the first space 71a and the second inverter module 110 in the second space 75a.

[0220] Moreover, the first inverter module 100 and the first capacitor module 120 are provided in the first space 71a. Therefore, in the first space 71a, the first inverter module 100 and the first capacitor module 120 can be arranged such that the wiring member connecting the first inverter module 100 and the first capacitor module 120 is as short as possible. Also, in the second space 75a, the second inverter module 110 and the second capacitor module 130 can be arranged such that the wiring member connecting the second inverter module 110 and the second capacitor module 130 is as short as possible. Accordingly, for both the first inverter circuit 40 and the second inverter circuit 50, it is possible to suppress the situation where the wiring member becomes long and the inductance increases.

[0221] As described above, for both the first inverter circuit 40 and the second inverter circuit 50, it is possible to suppress the situation where the performance that can be exhibited deteriorates due to a temperature rise or an increase in inductance.

[0222] In the present embodiment, four relatively heavy components, namely the inverter modules 100 and 110 and the capacitor modules 120 and 130, are provided in two each in the first space 71a and the second space 75a. In this configuration, in each of the first space 71a and the second space 75a, both of the two components can be arranged at a position of the inverter housing 70 where the strength is relatively high. Examples of positions where the strength is relatively high in the inverter housing 70 include positions close to the first outer peripheral wall 72 and the second outer peripheral wall 76 in a plan view.

[0223] For example, when the inverter housing 70 vibrates in the height direction Z, the outer peripheral walls 72 and 76 are less likely to vibrate in the height direction Z than the water channel wall 82. In the water channel wall 82, the closer a part is to the outer peripheral walls 72 and 76, the less likely it is to vibrate in the height direction Z. Therefore, in each of the first space 71a and the second space 75a, by arranging two components at positions close to the outer peripheral walls 72 and 76, a configuration can be realized in which these components are less likely to vibrate in the height direction Z. Moreover, in the case of two components, it is relatively easy to arrange these components at positions as close as possible in plan view so that the wiring member connecting these components becomes as short as possible.

[0224] For example, different from the present embodiment, assume a configuration in which four components are provided only in the first space 71a. In this configuration, in order to arrange the four components at a relatively strong part of the inverter housing 70 in the first space 71a, for example, each of the four components may be arranged at a position close to the first outer peripheral wall 72 in plan view. However, when each of the four components is arranged at a position close to the first outer peripheral wall 72, the distance between the four components is likely to increase. In this case, there is a concern that the performance that the inverter modules 100 and 110 can exhibit may deteriorate due to an increase in inductance or the like as the wiring member connecting the four components becomes longer.

[0225] On the other hand, in the present embodiment, since two relatively heavy components are provided in each of the first space 71a and the second space 75a, it is easy to shorten the wiring member connecting the two components. By doing so, the performance that the inverter modules 100 and 110 can exhibit can be enhanced, for example, by reducing the inductance of the wiring member.

[0226] According to the present embodiment, the first inverter module 100 and the second inverter module 110 are provided at positions overlapping the water channel 81. In this configuration, it is easy to impart the cooling effect of the refrigerant flowing through the water channel 81 to both the first inverter module 100 and the second inverter module 110.

[0227] According to this embodiment, the first capacitor module 120 is arranged along the water channel wall 82 in the first space 71a in parallel with the first inverter module 100. In this configuration, wiring can be performed so that the wiring member connecting the first inverter module 100 and the first capacitor module 120 does not penetrate the water channel wall 82. Then, since the inductance of this wiring member can be minimized, it is possible to suppress the reduction of the surge voltage reduction effect of the first capacitor module 120 on the first inverter module 100 due to the inductance.

[0228] The second inverter module 110 is arranged along the water channel wall 82 in the second space 75a in parallel with the second capacitor module 130. In this configuration, wiring can be performed so that the wiring member connecting the second inverter module 110 and the second capacitor module 130 does not penetrate the water channel wall 82. Then, since the inductance of this wiring member can be minimized, it is possible to suppress the reduction of the surge voltage reduction effect of the second capacitor module 130 on the second inverter module 110 due to the inductance.

[0229] According to this embodiment, the first capacitor module 120 is arranged in parallel with the second capacitor module 130 via the water channel wall 82. In this configuration, two components, namely the first capacitor module 120 and the second capacitor module 130, can be collectively fixed to a relatively high-strength portion of the inverter housing 70. Therefore, it is possible to facilitate the realization of a configuration in which each of the two components, the capacitor modules 120 and 130, is less likely to vibrate.

[0230] Further, the second inverter module 110 is arranged in parallel with the first inverter module 100 via the water channel wall 82. In this configuration, two components, namely the first inverter module 100 and the second inverter module 110, can be collectively fixed to a relatively high-strength portion of the inverter housing 70. Therefore, it is possible to facilitate the realization of a configuration in which each of the two components, the inverter modules 100 and 110, is less likely to vibrate.

[0231] According to this embodiment, at least a part of the water channel 81 is provided between the first inverter module 100 and the second inverter module 110. In this configuration, even if the first inverter module 100 and the second inverter module 110 are arranged side by side in the height direction Z, it is easy to impart the cooling effect of the refrigerant flowing through the water channel 81 to both of the inverter modules 100 and 110. Also, in this configuration, the cooling effect of the refrigerant is likely to be simultaneously imparted to both the first inverter module 100 and the second inverter module 110. For this reason, it is possible to suppress the occurrence of a difference in the cooling effect of the refrigerant between the first inverter module 100 and the second inverter module 110.

[0232] According to this embodiment, the output connector 150 and the first inverter module 100 are provided in the first space 71a. In this configuration, it is possible to realize a configuration in which at least a part of the output connector 150 is provided at a position aligned with at least one of the first inverter module 100 and the second module in the depth direction Y. For this reason, as described above, the difference between the length of the first output line 12oa and the length of the second output line 12ob can be minimized as much as possible, and thus it is possible to realize a configuration in which the respective performances of the first inverter circuit 40 and the second inverter circuit 50 are easily exhibited.

[0233] <Fourth Embodiment> In the first embodiment described above, both the inverter modules 100 and 110 and the capacitor modules 120 and 130 are provided in one of the first space 71a and the second space 75a. In contrast, in the fourth embodiment, one of the inverter modules 100 and 110 and the capacitor modules 120 and 130 is provided in one of the first space 71a and the second space 75a, and the other component is provided in the other space. Regarding the configuration, operation, and effects not particularly described in the fourth embodiment, they are the same as those in the first embodiment described above. In the fourth embodiment, the description will be centered on the points different from the first embodiment.

[0234] As shown in FIGS. 12 and 14, in the first space 71a, an inverter module 100, 110, an output connector 150, an input connector 160, and a filter component group 180G are provided. The first inverter module 100 and the second inverter module 110 are arranged in the depth direction Y in the same manner as in the second embodiment. On the other hand, the inverter modules 100, 110 are provided in such a direction that the P terminals 104, 114 and the N terminals 105, 115 and the output terminals 106, 116 are arranged in the depth direction Y, in the same manner as in the first embodiment. In the present embodiment, in the same manner as in the second embodiment, the depth direction Y corresponds to the arrangement direction of the inverter modules 100, 110, and the width direction X corresponds to the orthogonal direction.

[0235] Both the first output terminal 106 and the second output terminal 116 are provided between the first switch protection unit 103 and the second switch protection unit 113. The first P terminal 104 and the first N terminal 105 are provided on the side opposite to the second inverter module 110 via the first switch protection unit 103. The second P terminal 114 and the second N terminal 115 are provided on the side opposite to the first inverter module 100 via the second switch protection unit 113.

[0236] The output connector 150 is arranged in the width direction X along the inverter modules 100, 110. The output connector 150 is provided between one of the first width walls 72x and the inverter modules 100, 110. The output connector 150 is provided at a position adjacent to both the first inverter module 100 and the second inverter module 110. The output connector 150 is provided so as to span between the first inverter module 100 and the second inverter module 110 in the depth direction Y. The output connector 150 is arranged in the width direction X along each of the first output terminal 106 and the second output terminal 116.

[0237] In the output connector 150, the output board surface 151a extends in a direction orthogonal to the width direction X. The output connector 150 is in a state of being stacked on one of the first depth walls 72y. In the output connector 150, a plurality of connector terminals 26 are arranged in the depth direction Y along the first depth wall 72y.

[0238] At least a part of the output wirings 143 and 144 is provided between the first inverter module 100 and the second inverter module 110 in the depth direction Y. The first output wiring 143 extends as a whole in the width direction X from the output connector 150 toward the first output terminal 106. The second output wiring 144 extends as a whole in the width direction X from the output connector 150 toward the second output terminal 116.

[0239] The filter component group 180G is arranged in the width direction X for the inverter modules 100 and 110. The filter component group 180G is provided between the inverter modules 100 and 110 and the other first depth wall 72y. The filter component group 180G is provided on the side opposite to the output connector 150 via the inverter modules 100 and 110. In the filter component group 180G, a plurality of filter components 180 are arranged in the depth direction Y along the first depth wall 72y.

[0240] The input connector 160 is arranged in the depth direction Y for the filter component group 180G. The input connector 160 is provided in a state of penetrating the first width wall 72x in the depth direction Y. The input connector 160 is provided at a position away from the inverter modules 100 and 110 in the width direction X.

[0241] The control board 174 is in a state of being stacked on both the first drive board 171 and the second drive board 172. The control board 174 is provided so as to span between the first drive board 171 and the second drive board 172. The control board 174 is provided on the side opposite to the water channel wall 82 via the drive boards 171 and 172. Between the control board 174 and the water channel wall 82, the first output wiring 143 and the second output wiring 144 are wired.

[0242] As shown in FIGS. 13 and 14, a switching module 90 and capacitor modules 120 and 130 are provided in the second space 75a. The switching module 90 and the capacitor modules 120 and 130 are arranged in the depth direction Y. The first capacitor module 120 and the second capacitor module 130 are arranged in the depth direction Y via the switching module 90. The switching module 90 is provided with the first switching P terminal 94 and the second switching P terminal 95 arranged in the depth direction Y, similar to the third embodiment.

[0243] As shown in FIGS. 12, 13, and 14, the first inverter module 100 and the first capacitor module 120 are arranged in the height direction Z via the water channel wall 82. The first inverter module 100 has a portion overlapping the first capacitor module 120 in the height direction Z. The second inverter module 110 and the second capacitor module 130 are arranged in the height direction Z via the water channel wall 82. The second inverter module 110 has a portion overlapping the second capacitor module 130 in the height direction Z.

[0244] The inverter modules 100 and 110 and the switching module 90 are arranged in the height direction Z via the water channel wall 82. The first inverter module 100 has a portion overlapping the switching module 90 in the height direction Z. The second inverter module 110 has a portion overlapping the switching module 90 in the height direction Z.

[0245] As shown in FIGS. 12 and 13, the water channel wall 82 is provided with third wiring holes 85c, similar to the third embodiment. A plurality of third wiring holes 85c are provided in the water channel wall 82. The third wiring holes 85c include a hole through which a wiring member connecting the first inverter module 100 and the first capacitor module 120 is inserted, and a hole through which a wiring member connecting the second inverter module 110 and the second capacitor module 130 is inserted.

[0246] In the water channel wall 82, a fifth wiring hole 85e is provided as a water channel wall hole 85. The fifth wiring hole 85e is a hole for inserting a wiring member. A wiring member forming a switching P line 12pc, a wiring member forming a switching N line 12nc, etc. are inserted into the fifth wiring hole 85e. For example, a wiring member for connecting the inverter modules 100, 110 and the switching module 90 is inserted into the fifth wiring hole 85e.

[0247] In addition to the first inverter path 81a, the second inverter path 81b, the switching path 81c, the first capacitor path 81f, etc., the water channel 81 has a second capacitor path 81g. The second capacitor path 81g is a portion of the water channel 81 that overlaps with the second capacitor module 130. In the second capacitor path 81g, a cooling effect by the refrigerant is easily imparted to the second capacitor module 130.

[0248] In the water channel 81, at least a part of the first inverter path 81a overlaps with the first capacitor path 81f and the switching path 81c. In the water channel 81, a portion between the first inverter module 100 and the first capacitor module 120 in the height direction Z is included in both the first inverter path 81a and the first capacitor path 81f. Also, in the water channel 81, a portion between the first inverter module 100 and the switching module 90 in the height direction Z is included in both the first inverter path 81a and the switching path 81c.

[0249] In the water channel 81, at least a part of the second inverter path 81b overlaps with the second capacitor path 81g and the switching path 81c. In the water channel 81, a portion between the second inverter module 110 and the second capacitor module 130 in the height direction Z is included in both the second inverter path 81b and the second capacitor path 81g. Also, in the water channel 81, a portion between the second inverter module 110 and the switching module 90 in the height direction Z is included in both the second inverter path 81b and the switching path 81c.

[0250] <Group C> According to this embodiment, the first capacitor module 120 is arranged along the water channel wall 82 in the second space 75a in parallel with the second capacitor module 130. In this configuration, wiring can be performed so that the wiring member connecting the first capacitor module 120 and the second capacitor module 130 does not penetrate the water channel wall 82. Then, since the inductance of this wiring member can be minimized, it is possible to suppress the resonance between the current flowing through the first capacitor module 120 and the current flowing through the second capacitor module 130.

[0251] The second inverter module 110 is arranged along the water channel wall 82 in the first space 71a in parallel with the first inverter module 100. In this configuration, wiring can be performed so that the wiring member connecting the second inverter module 110 and the first inverter module 100 does not penetrate the water channel wall 82. Then, since the inductance of this wiring member can be minimized, it is possible to shorten the first circulation path and the second circulation path when a short - circuit phase occurs, and to reduce the heat generated in this wiring member.

[0252] According to this embodiment, the first capacitor module 120 is arranged in parallel with the first inverter module 100 via the water channel wall 82. In this configuration, two components, namely the first capacitor module 120 and the first inverter module 100, can be collectively fixed to a relatively high - strength portion of the inverter housing 70. Therefore, it is possible to facilitate the realization of a configuration in which each of the two components, the first capacitor module 120 and the first inverter module 100, is less likely to vibrate.

[0253] Also, the second inverter module 110 is arranged in parallel with the second capacitor module 130 via the water channel wall 82. In this configuration, two components, namely the second inverter module 110 and the second capacitor module 130, can be collectively fixed to a relatively high - strength portion of the inverter housing 70. Therefore, it is possible to facilitate the realization of a configuration in which each of the two components, the second inverter module 110 and the second capacitor module 130, is less likely to vibrate.

[0254] According to this embodiment, at least a part of the water channel 81 is provided between the first inverter module 100 and the first capacitor module 120. In this configuration, it is easy to impart the cooling effect of the refrigerant flowing through the water channel 81 to both the first inverter module 100 and the first capacitor module 120. Also, at least a part of the water channel 81 is provided between the second inverter module 110 and the second capacitor module 130. In this configuration, it is easy to impart the cooling effect of the refrigerant flowing through the water channel 81 to both the second inverter module 110 and the second capacitor module 130.

[0255] <Fifth Embodiment> In the fourth embodiment described above, in the configuration in which the first inverter module 100 and the second inverter module 110 are arranged side by side in the height direction Z, the first output terminal 106 and the second output terminal 116 are provided at positions facing each other. In contrast, in the fifth embodiment, the first output terminal 106 and the second output terminal 116 are provided so as not to face each other. Regarding the configuration, operation, and effects not particularly described in the fifth embodiment, they are the same as those in the fourth embodiment described above. In the fifth embodiment, the description will focus on the differences from the fourth embodiment.

[0256] As shown in FIG. 15, the inverter modules 100 and 110 are provided in the same orientation as in the fourth embodiment described above, with the P terminals 104 and 114, the N terminals 105 and 115, and the output terminals 106 and 116 arranged in the depth direction Y. One of the first output terminal 106 and the second output terminal 116 is provided between the first switch protection unit 103 and the second switch protection unit 113.

[0257] For example, the second output terminal 116 is provided between the first switch protection unit 103 and the second switch protection unit 113. The first output terminal 106 is provided on the side opposite to the second P terminal 114 and the second N terminal 115 via the first switch protection unit 103. Between the first switch protection unit 103 and the second switch protection unit 113, in addition to the second output terminal 116, a first P terminal 104 and a first N terminal 105 are provided. The first output terminal 106 is provided on the side opposite to the second output terminal 116 via the first switch protection unit 103. The second P terminal 114 and the second N terminal 115 are provided on the side opposite to the first P terminal 104 and the first N terminal 105 via the second switch protection unit 113.

[0258] Similar to the second embodiment, the output connector 150 is provided on the side opposite to the second inverter module 110 via the first inverter module 100 in the depth direction Y. Similar to the first embodiment, the first output terminal 106 is provided between the first switch protection unit 103 and the output connector 150. In this configuration, since the first output terminal 106 and the output connector 150 are arranged at positions as close as possible, it is possible to wire the first output wiring 143 to be as short as possible.

[0259] The output connector 150 is on the side opposite to the second output terminal 116 via the first inverter module 100. The second output wiring 144 is connected to the second output terminal 116 and the second connector terminal 152b in a state of detouring around the first inverter module 100 in the width direction X.

[0260] A third wiring hole 85c is provided between the first inverter module 100 and the second inverter module 110. A wiring member connecting the first inverter module 100 and the first capacitor module 120, etc. is inserted through this third wiring hole 85c.

[0261] <Component Group E> According to this embodiment, the first output terminal 106 is provided on the side opposite to the second inverter module 110 in the first switch protection unit 103. Further, the second output terminal 116 is provided on the side opposite to the first inverter module 100 in the second switch protection unit 113. In these configurations, the first output terminal 106 and the second output terminal 116 can be arranged at positions separated in the depth direction Y via the switch protection units 103 and 113. Therefore, even if heat is generated from the first output terminal 106 or the second output terminal 116, it is possible to avoid the heat being trapped in the space between the first switch protection unit 103 and the second switch protection unit 113.

[0262] <Sixth Embodiment> In the fourth embodiment described above, in the configuration in which the first inverter module 100 and the second inverter module 110 are arranged side by side in the height direction Z, the first output terminal 106 and the second output terminal 116 are provided between the first switch protection unit 103 and the second switch protection unit 113. In contrast, in the sixth embodiment, neither the first output terminal 106 nor the second output terminal 116 is provided between the first switch protection unit 103 and the second switch protection unit 113. Regarding the configurations, operations, and effects not particularly described in the sixth embodiment, they are the same as those in the fourth embodiment described above. In the sixth embodiment, the description will focus on the differences from the fourth embodiment.

[0263] As shown in FIG. 16, the inverter modules 100 and 110 are provided in the same orientation as in the fourth embodiment above, with the P terminals 104 and 114, the N terminals 105 and 115, and the output terminals 106 and 116 arranged in the depth direction Y. The P terminals 104 and 114 and the N terminals 105 and 115 are provided between the first switch protection unit 103 and the second switch protection unit 113. The first output terminal 106 is provided on the side opposite to the second inverter module 110 via the first switch protection unit 103. The second output terminal 116 is provided on the side opposite to the first inverter module 100 via the second switch protection unit 113.

[0264] The output connector 150 is arranged side by side with the inverter modules 100 and 110 in the width direction X, similarly to the fourth embodiment. The output connector 150 is arranged side by side with the P terminals 104 and 114 and the N terminals 105 and 115 in the width direction X. The output connector 150 is provided at a position substantially in the middle between the first output terminal 106 and the second output terminal 116 in the depth direction Y.

[0265] The first output wiring 143 is connected to the first output terminal 106 and the first connector terminal 152a in a state of detouring so as to avoid the first inverter module 100 in the width direction X and the depth direction Y. The second output wiring 144 is connected to the second output terminal 116 and the second connector terminal 152b in a state of detouring so as to avoid the second inverter module 110 in the width direction X and the depth direction Y.

[0266] The third wiring hole 85c is provided between the first inverter module 100 and the second inverter module 110, similarly to the fifth embodiment. Wiring members connecting the first inverter module 100 and the first capacitor module 120, wiring members connecting the second inverter module 110 and the second capacitor module 130, etc. are inserted through the third wiring hole 85c.

[0267] <Seventh Embodiment> In the first embodiment, the switching circuit 60 can switch the energization state of the P line 12p. In contrast, in the seventh embodiment, the switching circuit 60 can switch the energization states of the P line 12p and the N line 12n, respectively. Regarding the configurations, operations, and effects not particularly described in the seventh embodiment, they are the same as those in the first embodiment. In the seventh embodiment, the description will be centered around the differences from the first embodiment.

[0268] As shown in FIG. 17, the switching circuit 60 has an N switch 63 in addition to the P switch 61. The N switch 63 is provided on the switching N line 12nc. The N switch 63 is provided between the first inverter circuit 40 and the second inverter circuit 50. The N switch 63 can cut off the energization of the switching N line 12nc. The N switch 63 corresponds to a changeover switch.

[0269] The N switch 63 is formed of a switching element, similarly to the P switch 61. The N switch 63 can shift between an energized state in which current flows and a cutoff state in which current is cut off. The N switch 63 is sometimes referred to as a switch. Note that the N switch 63 may be formed of a mechanical switch.

[0270] The N switch 63 switches in response to a drive command from the control circuit 36 or the like. A drive signal for driving the N switch 63 is generated by the switching drive circuit 37c. When the drive mode of the motor 20 is star connection drive, both the P switch 61 and the N switch 63 may be in the cutoff state. When the drive mode of the motor 20 is open connection drive, both the P switch 61 and the N switch 63 are in the energized state.

[0271] As shown in FIG. 18, the switching module 90 has an N switch section 97 in addition to the P switch section 91 and the changeover switch protection section 93. The N switch section 97 is a component having the N switch 63. The N switch section 97 forms the N switch 63. The N switch section 97 is formed of a semiconductor chip or the like. The N switch section 97 is protected by the changeover switch protection section 93.

[0272] The switching module 90 has a first switching N terminal 98 and a second switching N terminal 99. The switching N terminals 98 and 99 are conductive members and are formed of a conductive material such as copper. Wiring members are connected to each of the switching N terminals 98 and 99 so as to be energizable. The first switching N terminal 98 is a terminal member for connecting the N switch 63 to the first N line 12na. For example, the first switching N terminal 98 forms a part of the switching N line 12nc. The second switching N terminal 99 is a terminal member for connecting the N switch 63 to the second N line 12nb. For example, the second switching N terminal 99 forms a part of the switching N line 12nc.

[0273] The switching N terminals 98 and 99 are arranged along the outer peripheral end of the switching module 90. The switching N terminals 98 and 99 are provided so as to protrude outward from the switching switch protection portion 93. For example, the first switching N terminal 98 is provided on the side opposite to the second switching N terminal 99 via the switching switch protection portion 93.

[0274] <Eighth Embodiment> In the first embodiment described above, the first inverter circuit 40 is connected to one end of the motor coil 22, and the second inverter circuit 50 is connected to the other end. In contrast, in the eighth embodiment, both the first inverter circuit 40 and the second inverter circuit 50 are connected to one end of the motor coil 22. Regarding the configurations, operations, and effects not particularly described in the eighth embodiment, they are the same as those in the first embodiment. In the eighth embodiment, the description will focus on the differences from the first embodiment.

[0275] As shown in FIG. 19, the first inverter circuit 40 and the second inverter circuit 50 are connected in parallel to the motor 20. For example, both the first inverter circuit 40 and the second inverter circuit 50 are connected to the first coil end 22a with respect to the motor coil 22. The plurality of second coil ends 22b of multiple phases may be connected to each other so as to form the neutral point of the motor coil 22.

[0276] The first inverter circuit 40 and the second inverter circuit 50 are also connected in parallel to the battery 11. The switching P line 12pc and the switching N line 12nc are power lines 12 for connecting the first inverter circuit 40 and the second inverter circuit 50 in parallel to the battery 11. The switching P line 12pc and the switching N line 12nc are provided for at least one of the first inverter circuit 40 and the second inverter circuit 50. For example, the switching P line 12pc and the switching N line 12nc are provided for the second inverter circuit 50. In this configuration, the switching P line 12pc and the switching N line 12nc connect the battery 11 and the second inverter circuit 50. The switching circuit 60 can cut off the power supply from the battery 11 to the second inverter circuit 50.

[0277] Note that the switching P line 12pc and the switching N line 12nc may be provided for each of the first inverter circuit 40 and the second inverter circuit 50. In this configuration, as the switching P line 12pc and the switching N line 12nc, lines 12pc, 12nc connecting the battery 11 and the first inverter circuit 40 and lines 12pc, 12nc connecting the battery 11 and the second inverter circuit 50 are provided. The switching circuit 60 provided in the lines 12pc, 12nc connecting the battery 11 and the first inverter circuit 40 can cut off the power supply from the battery 11 to the first inverter circuit 40. The switching circuit 60 provided in the lines 12pc, 12nc connecting the battery 11 and the second inverter circuit 50 can cut off the power supply from the battery 11 to the second inverter circuit 50.

[0278] <Other Embodiments> The disclosure of this specification is not limited to the illustrated embodiments. The disclosure includes the illustrated embodiments and modifications by those skilled in the art based thereon. For example, the disclosure is not limited to the components and combinations of elements shown in the embodiments, and can be implemented with various modifications. The disclosure can be implemented by various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure includes those in which the components and elements of the embodiments are omitted. The disclosure includes the replacement or combination of components and elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope should be construed as being indicated by the description of the claims and including all modifications within the meaning and scope equivalent to the description of the claims.

[0279] <Group A components> In each of the above embodiments, the first inverter module 100, the second inverter module 110, and the switching module 90 may be arranged in any manner as long as they are housed in the inverter housing 70. For example, the first inverter module 100 may be provided in one of the first space 71a and the second space 75a, and the second inverter module 110 and the switching module 90 may be provided in the other space. Further, at least one of the first inverter module 100 and the second inverter module 110 may be arranged side by side with the switching module 90 via the water channel wall 82.

[0280] In each of the above embodiments, the water channel 81 may be provided so as not to overlap the first inverter module 100, the second inverter module 110, or the switching module 90. For example, the water channel 81 may not have the first inverter path 81a, the second inverter path 81b, or the switching path 81c.

[0281] In each of the above embodiments, the first inverter module 100 and the second inverter module 110 do not have to be the same inverter components. For example, the positional relationships of the switch parts 101, 102, 111, 112 may be different between the first inverter module 100 and the second inverter module 110. Also, the model numbers and the like may be different between the first inverter module 100 and the second inverter module 110.

[0282] In each of the above embodiments, the inverter modules 100, 110 and the switching module 90 may be provided at any positions with respect to the capacitor modules 120, 130, the filter component group 180G, the output connector 150, and the input connector 160. For example, in the first embodiment above, in the first space 71a, in addition to the inverter modules 100, 110 and the switching module 90, the filter component group 180G and the input connector 160 may be provided.

[0283] <Component group B> In each of the above embodiments, the four components, namely the inverter modules 100, 110 and the capacitor modules 120, 130, may be arranged in any manner as long as they are provided in one of the first space 71a and the second space 75a. For example, the four components may be provided such that the first inverter module 100 and the second capacitor module 130 are adjacent to each other in one of the first space 71a and the second space 75a. Also, in the four components, the first capacitor module 120 or the second capacitor module 130 may be provided between the first inverter module 100 and the second inverter module 110.

[0284] In each of the above embodiments, the four components may be provided in any manner with respect to the water channel 81 in one of the first space 71a and the second space 75a. For example, each of the four components may be provided at a position overlapping the water channel 81. That is, in a configuration where the four components are provided in one of the first space 71a and the second space 75a, the water channel 81 may have the inverter paths 81a, 81b and the capacitor paths 81f, 81g.

[0285] In each of the above embodiments, any components may be provided in one of the first space 71a and the second space 75a in addition to the four components. For example, in one of the first space 71a and the second space 75a, in addition to the four components, the filter component group 180G and the input connector 160 may be provided.

[0286] <Component group C> In each of the above embodiments, if the four components, namely the inverter modules 100, 110 and the capacitor modules 120, 130, are provided two by two in the first space 71a and the second space 75a, they may be arranged in any manner. For example, in the above-described third embodiment and the above-described fourth embodiment, the first inverter module 100 may be provided in the second space 75a, and the second capacitor module 130 may be provided in the first space 71a. In the above-described third embodiment, the first inverter module 100 and the second inverter module 110 may be provided at positions shifted or separated in the width direction X or the depth direction Y. Also, in the above-described fourth embodiment, the first inverter module 100 and the second capacitor module 130 may be arranged side by side in the height direction Z via the water channel wall 82.

[0287] In each of the above embodiments, in each of the first space 71a and the second space 75a, the two components may be provided in any manner with respect to the water channel 81. For example, at least one of the two components may be provided so as to overlap the water channel 81, or both of the two components may be provided at positions where they do not overlap the water channel 81. For example, in the above-described third embodiment, a first capacitor path 81f and a second capacitor path 81g may be provided between the first capacitor module 120 and the second capacitor module 130 in the water channel wall 82.

[0288] In each of the above embodiments, in each of the first space 71a and the second space 75a, in addition to the two components, any components may be provided. For example, in the above-described fourth embodiment, in the first space 71a, in addition to the two components, the inverter modules 100 and 110, and the filter component group 180G, etc., a switching module 90 may be provided.

[0289] <Component group D> In each of the above embodiments, at least a part of the output connector 150 may be provided at any position as long as it is arranged along at least one of the inverter modules 100 and 110 in a direction orthogonal to the arrangement direction of the inverter modules 100 and 110. Examples of the positional relationship between the output connector 150 and the inverter modules 100 and 110 include the above-described first embodiment, the third embodiment, the fourth embodiment, the sixth embodiment, etc.

[0290] In the configuration in which the output connector 150 and the inverter modules 100 and 110 are arranged in the orthogonal direction in each of the above embodiments, the orientation of the output connector 150 and the orientation of the inverter modules 100 and 110 may be any. For example, the output connector 150 may be provided in an orientation extending in a direction orthogonal to the arrangement direction of the inverter modules 100 and 110. For example, in the above-described first embodiment, the output connector 150 may be provided in an orientation extending in a direction orthogonal to the width direction X.

[0291] In each of the above embodiments, if the output connector 150 and the inverter modules 100 and 110 are arranged in an orthogonal direction, the positional relationship between the output connector 150 and the inverter modules 100 and 110 may be any. For example, in the first embodiment described above, in the depth direction Y, capacitor modules 120 and 130, a switching module 90, etc. may be provided between the output connector 150 and the inverter modules 100 and 110. Also, the output connector 150 may be provided at a position shifted or separated from the inverter modules 100 and 110 in the height direction Z.

[0292] <Constituent group E> In each of the above embodiments, the output connector 150 may be provided at any position as long as it is provided on the opposite side of one of the first inverter module 100 and the second inverter module 110 via the other. For example, the output connector 150 may be provided on the opposite side of one of the first inverter module 100 and the second inverter module 110 via the other in the height direction Z or the width direction X.

[0293] In each of the above embodiments, in the configuration where the output connector 150 is provided on the opposite side of one of the inverter modules 100 and 110 via the other, the orientation of the output connector 150 and the orientation of the inverter modules 100 and 110 may be any. For example, the output connector 150 may be provided so as to extend along the arrangement direction of the inverter modules 100 and 110. For example, in the first embodiment described above, the output connector 150 may be provided in an orientation extending in a direction orthogonal to the height direction Z.

[0294] In each of the above embodiments, if the output connector 150 is provided on the side opposite to the other via one of the inverter modules 100 and 110, the positional relationship between the output connector 150 and the inverter modules 100 and 110 may be any. For example, in the second embodiment described above, in the depth direction Y, capacitor modules 120 and 130, a switching module 90, etc. may be provided between the output connector 150 and the inverter modules 100 and 110. Also, in the second embodiment described above, the output connector 150 may be provided at a position displaced from the inverter modules 100 and 110 in the height direction Z or the width direction X.

[0295] <Common> In each of the above embodiments, components such as the inverter modules 100 and 110, the capacitor modules 120 and 130, and the switching module 90 may be provided in any orientation. For example, the inverter modules 100 and 110 and the drive substrates 171 and 172 may be provided so as to extend in a direction orthogonal to the width direction X or the depth direction Y. The orientations of the first inverter module 100 and the second inverter module 110 may be different. For example, the direction in which the first P terminal 104, the first N terminal 105, and the first output terminal 106 are arranged may be different from the direction in which the second P terminal 114, the second N terminal 115, and the second output terminal 116 are arranged.

[0296] In the output connector 150, the output facing surface 151b does not necessarily face the motor 20 side. Even with this configuration, if the motor connector 25 is provided in a state where it can be displaced relative to the motor housing 24, the motor connector 25 can be connected to the output connector 150.

[0297] In each of the above embodiments, the output connector 150 may have any shape or structure. For example, in the output connector 150, a plurality of output connector terminals 152 may not be arranged in a line. For example, a plurality of first connector terminals 152a and a plurality of second connector terminals 152b may be arranged in two columns. Also, the output connector 150 may be provided in any orientation. For example, the output connector 150 may be provided in an orientation extending in a direction orthogonal to the width walls 72x, 76x and the depth walls 72y, 76y.

[0298] In each of the above embodiments, components such as the inverter modules 100, 110, the capacitor modules 120, 130, and the switching module 90 may be provided in any positional relationship. For example, the inverter modules 100, 110 and the drive substrates 171, 172 may not be in a state of overlapping each other. For example, the inverter modules 100, 110 and the drive substrates 171, 172 may be provided at positions separated in the width direction X or the depth direction Y.

[0299] In each of the above embodiments, the internal space of the inverter housing 70 may be partitioned in any way by a space partition such as the water channel wall 82. For example, the first space 71a and the second space 75a may be partitioned so as to be arranged in the width direction X or the depth direction Y. Also, the internal space of the inverter housing 70 may not be partitioned. That is, the inverter housing 70 may not have a space partition.

[0300] In each of the above embodiments, the water channel 81 may be provided at a position overlapping the output connector 150. For example, in the first embodiment above, a part of the water channel 81 and the output connector 150 may be arranged in the height direction Z. In this configuration, a portion of the water channel 81 that overlaps the output connector 150 may be referred to as an output connector path. In this configuration, the cooling effect of the refrigerant is easily imparted from the output connector path to the output connector 150.

[0301] In each of the above embodiments, the water channel 81 may have a branching portion where it branches or a confluence portion where it merges. For example, the water channel 81 may branch into two branch channels. One of the two branch channels may be provided at a position overlapping the first inverter module 100, and the other may be provided at a position overlapping the second inverter module 110. And the confluence after the two branch channels merge may be provided at a position overlapping the switching module 90 or the capacitor modules 120 and 130.

[0302] In each of the above embodiments, the water channel 81 may be provided in the inverter housing 70 in any manner. For example, the water channel 81 may extend so as to spread over the entire first space 71a or the second space 75a in a plan view. Also, the water channel 81 may be provided on the case outer wall 701a, the first outer peripheral wall 72, the second outer peripheral wall 76, etc. The water channel 81 may be provided in the first space 71a or the second space 75a. For example, the water channel 81 may be formed by piping or the like provided in the first space 71a or the second space 75a. Furthermore, the water channel 81 may not be provided in the inverter housing 70. For example, the space partition portion may not form the water channel 81.

[0303] In each of the above embodiments, in the motor unit 15, the motor housing 24 and the inverter housing 70 may be integrally formed. For example, the motor unit 15 may have a unit housing. The unit housing forms both the motor housing 24 and the inverter housing 70. The unit housing houses the modules 100, 110 and the capacitor modules 120, 130, etc. In this configuration, the unit housing corresponds to the housing.

[0304] In each of the above embodiments, the moving body on which the motor unit 15 is mounted does not have to be an aircraft as long as it can move by the rotation of a rotating body. For example, the moving body may be a vehicle, a ship, a construction machine, or an agricultural machine. For example, when the moving body is a vehicle or a construction machine, the rotating body is a moving wheel or the like, and the output shaft portion is an axle or the like. When the moving body is a ship, the rotating body is a propulsion screw propeller or the like, and the output shaft portion is a propeller shaft or the like.

[0305] (Disclosure of Technical Ideas) This specification discloses a plurality of technical ideas described in a plurality of claims listed below. Some claims may be described in a multiple dependent form in which a preceding claim is alternatively cited in a subsequent claim. Further, some claims may be described in a multiple dependent form that cites another multiple dependent form claim. The claims described in these multiple dependent forms define a plurality of technical ideas.

[0306] (Technical Idea 1) A power conversion device (30) that converts power supplied to a rotating electrical machine (20), including a plurality of first switches (42, 43), having a first inverter (40) connected to the winding (22) of the rotating electrical machine, and a first inverter component (100) that converts the power supplied to the winding by the first inverter; including a plurality of second switches (52, 53), having a second inverter (50) connected to the winding, and a second inverter component (110) that converts the power supplied to the winding by the second inverter; a first capacitor component (120) having a first smoothing capacitor (31) connected in parallel with the first inverter; a second capacitor component (130) having a second smoothing capacitor (32) connected in parallel with the second inverter; A housing (70) that houses the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component, A space partition portion (82) that is provided so as to partition the internal space of the housing into a first space (71a) and a second space (75a) and forms a refrigerant flow path (81) through which refrigerant flows, comprising The first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space, and is a power conversion device.

[0307] (Technical idea 2) The first inverter component and the first capacitor component are arranged adjacent to each other along the space partition portion, The power conversion device according to Technical Idea 1, wherein the second inverter component and the second capacitor component are arranged adjacent to each other along the space partition portion.

[0308] (Technical idea 3) The first inverter component and the second inverter component are arranged adjacent to each other along the space partition portion, The power conversion device according to Technical Idea 1 or 2, wherein the first capacitor component and the second capacitor component are arranged adjacent to each other along the space partition portion.

[0309] (Technical idea 4) The power conversion device according to any one of Technical Ideas 1 to 3, wherein the refrigerant flow path is provided such that the refrigerant reaches one of the first inverter component and the second inverter component and then reaches the other.

[0310] (Technical idea 5) A switching path (12pc) that can switch the energization state of the winding and connects the first inverter and the second inverter in an energizable manner without passing through the winding, A switching component (90) having a switching switch (61, 63) provided in the switching path, and capable of interrupting energization of the switching path by the switching switch, comprising: The switching component is provided in the space among the first space and the second space where the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are located, and is the power conversion device according to any one of Technical Ideas 1 to 4.

[0311] (Technical Idea 6) A switching path (12pc) capable of switching the energization state of the winding and connecting the first inverter and the second inverter in an energizable manner without passing through the winding, A switching component (90) having a switching switch (61, 63) provided in the switching path, and capable of interrupting energization of the switching path by the switching switch, comprising: The refrigerant flow path is provided such that the refrigerant reaches one by one in order among the first inverter component, the second inverter component, and the switching component, and is the power conversion device according to any one of Technical Ideas 1 to 5.

[0312] (Technical Idea 7) A filter component (180) forming at least a part of a filter circuit (33) connected in parallel to one of the first inverter and the second inverter, A filter component group (180G) in which the filter components are intensively provided, comprising: The filter component is provided in a space different from the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component among the first space and the second space, and is the power conversion device according to any one of Technical Ideas 1 to 6.

[0313] (Technical Idea 8) In the filter component group, A filter coil component (181) having a coil element and being the filter component, having a capacitor element, a filter capacitor component (182) which is the filter component, and is included, the power conversion device according to Technical Idea 7, wherein at least one of the filter coil component and the filter capacitor component is provided at a position overlapping the refrigerant flow path.

[0314] (Technical Idea 9) the first inverter is connected to one end (22a) of the winding, the second inverter is connected to the other end (22b) of the winding, the power conversion device according to any one of Technical Ideas 1 to 8.

[0315] (Technical Idea 10) a rotating electric machine (20) driven by power supply, a power conversion device (30) for converting the power supplied to the rotating electric machine, a rotating electric machine unit (15) comprising: a first inverter component (100) formed by including a plurality of first switches (42, 43), having a first inverter (40) connected to the winding (22) of the rotating electric machine, and converting the power supplied to the winding by the first inverter; a second inverter component (110) formed by including a plurality of second switches (52, 53), having a second inverter (50) connected to the winding, and converting the power supplied to the winding by the second inverter; a first capacitor component (120) having a first smoothing capacitor (31) connected in parallel to the first inverter; a capacitor component (130) having a second smoothing capacitor (32) connected in parallel to the second inverter; a housing (70) accommodating the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component; A space partition portion (82) that is provided so as to partition the internal space of the housing into a first space (71a) and a second space (75a) and forms a refrigerant flow path (81) through which refrigerant flows, is provided with, The first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space, a rotating electrical machine unit.

Explanation of Signs

[0316] 12pc... Switching P line as a switching path, 15... Motor unit as a rotating electrical machine unit, 20... Motor as a rotating electrical machine, 22... Motor coil as a winding, 22a... First coil end as one end, 22b... Second coil end as the other end, 30... Inverter device as a power conversion device, 31... First smoothing capacitor, 32... Second smoothing capacitor, 33... Filter circuit, 40... First inverter circuit as a first inverter, 42... First upper arm switch as a first switch, 43... First lower arm switch as a first switch, 50... Second inverter circuit as a second inverter, 52... Second upper arm switch as a second switch, 53... Second lower arm switch as a second switch, 61... P switch as a switching switch, 63... N switch as a switching switch, 70... Inverter housing as a housing, 71a... First space, 75a... Second space, 81... Waterway as a refrigerant flow path, 82... Waterway wall as a flow path forming portion, 90... Switching module as a switching component, 100... First module as a first inverter component, 110... Second module as a second inverter component, 120... First capacitor module as a first capacitor component, 130... Second capacitor module as a second capacitor component, 180... Filter component, 180G... Filter component group, 181... Filter coil component, 182... Filter capacitor component.

Claims

1. A power conversion device (30) that converts power supplied to a rotating electrical machine (20), comprising a first inverter (40) formed by including a plurality of first switches (42, 43) and connected to a winding (22) of the rotating electrical machine, and a first inverter component (100) that converts the power supplied to the winding by the first inverter; a second inverter component (110) comprising a second inverter (50) formed by including a plurality of second switches (52, 53) and connected to the winding, and converting the power supplied to the winding by the second inverter; a first capacitor component (120) having a first smoothing capacitor (31) connected in parallel with the first inverter; a second capacitor component (130) having a second smoothing capacitor (32) connected in parallel with the second inverter; a housing (70) that houses the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component; a space partition (82) provided so as to partition the internal space of the housing into a first space (71a) and a second space (75a), and forming a refrigerant flow path (81) through which refrigerant flows; and wherein the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space, the power conversion device.

2. The first inverter component and the first capacitor component are arranged side by side along the space partition so as to be adjacent to each other, and the second inverter component and the second capacitor component are arranged side by side along the space partition so as to be adjacent to each other. The power conversion device according to claim 1.

3. The first inverter component and the second inverter component are arranged side by side along the space partition so as to be adjacent to each other, and the first capacitor component and the second capacitor component are arranged side by side along the space partition so as to be adjacent to each other. The power conversion device according to claim 1 or 2.

4. The refrigerant flow path is provided such that the refrigerant reaches one of the first inverter component and the second inverter component and then reaches the other. The power conversion device according to claim 1 or 2.

5. The energization state of the winding can be switched, and there is a switching path (12pc) that enables the first inverter and the second inverter to be energized and connected without passing through the winding. A switching component (90) having switching switches (61, 63) provided in the switching path, and the switching switches can cut off the energization of the switching path. It is provided with The switching component is provided in the space among the first space and the second space where the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are located. The power conversion device according to claim 1 or 2.

6. The energization state of the winding can be switched, and there is a switching path (12pc) that enables the first inverter and the second inverter to be energized and connected without passing through the winding. A switching component (90) having switching switches (61, 63) provided in the switching path, and the switching switches can cut off the energization of the switching path. It is provided with The refrigerant flow path is provided such that the refrigerant reaches one by one in order among the first inverter component, the second inverter component, and the switching component. The power conversion device according to claim 1 or 2.

7. A filter component (180) that forms at least a part of a filter circuit (33) connected in parallel to one of the first inverter and the second inverter. A filter component group (180G) in which the filter components are intensively provided. It is provided with The filter component is provided in a space different from the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component among the first space and the second space. The power conversion device according to claim 1 or 2.

8. In the filter component group, A filter coil component (181) having a coil element and being the filter component. A filter capacitor component (182) having a capacitor element and being the filter component. Is included, At least one of the filter coil component and the filter capacitor component is provided at a position overlapping the refrigerant flow path. The power conversion device according to claim 7.

9. The first inverter is connected to one end (22a) of the winding. The second inverter is connected to the other end (22b) of the winding. The power conversion device according to claim 1 or 2.

10. A rotating electric machine (20) driven by power supply. A power conversion device (30) that converts the power supplied to the rotating electric machine A rotating electric machine unit (15) comprising A first inverter component (100) including a plurality of first switches (42, 43) and having a first inverter (40) connected to the winding (22) of the rotating electric machine, and converting the power supplied to the winding by the first inverter A second inverter component (110) including a plurality of second switches (52, 53) and having a second inverter (50) connected to the winding, and converting the power supplied to the winding by the second inverter A first capacitor component (120) having a first smoothing capacitor (31) connected in parallel with the first inverter A second capacitor component (130) having a second smoothing capacitor (32) connected in parallel with the second inverter A housing (70) housing the first inverter component, the second inverter component, the first capacitor component, and the second capacitor component A space partition (82) provided to partition the internal space of the housing into a first space (71a) and a second space (75a), and forming a refrigerant flow path (81) through which refrigerant flows Comprising The first inverter component, the second inverter component, the first capacitor component, and the second capacitor component are provided in one of the first space and the second space, a rotating electric machine unit

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