JPH0937414A - Inverter on-board electric car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency during production and maintenance by housing a plurality of power units and common units in one container with control command signal wires and making the equipment smaller and shortening production time period. SOLUTION: A plurality of power units 30a and 30b housing main circuit parts (semiconductor elements 31, filter capacitor 9) and control parts for controlling the main circuit parts by control command signals (voltage sensor 12, overvoltage control circuit 14, control command arithmetic unit 20), distribution parts for distributing the command signals of an electric car to power units 30a and 30b, and a common unit 41 housing interface parts for transmitting the distributed command signal to the power units 30a and 30b after converting to the control command signals are housed in one container 43. And the power units 30a and 30b and common unit 41 are respectively connected with control command signal wires 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle-mounted inverter device which is provided under the floor of an electric vehicle and controls the electric vehicle. In particular, the manufacturing period of the device is shortened and at the time of manufacturing the device and maintenance. By improving the work efficiency at the time, it can be formed at low cost.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing a conventional electric vehicle-mounted inverter device disclosed in, for example, Japanese Utility Model Publication No. 4-45362, and FIG. 9 is each of the electric vehicle-mounted inverter devices shown in FIG. FIG. 10 is a diagram for explaining wiring between units, FIG.
FIG. 9 is a cross-sectional view for explaining the inside of the semiconductor unit shown in FIG. 8. In the figure, 1a and 1b are semiconductor units,
Inside the semiconductor units 1a and 1b, a plurality of semiconductor elements 2 and phase capacitors 3 are connected to wiring 4. 5 is a heat pipe type cooler for cooling the semiconductor element 2,
Base 6 as an evaporation unit on which the semiconductor element 2 is mounted
And a radiation fin 7 as a condenser are connected by a heat pipe 8. The base 6 is the semiconductor unit 1a, 1
It is formed so as to incline upward by 7 ° from the horizontal direction of b toward the radiation fin 7 side, and the efficiency of refrigerant circulation is improved.

Reference numeral 9 is a filter capacitor. A voltage detection unit 11 has a voltage detection sensor 12 inside. An overvoltage suppressing unit 13 includes an overvoltage suppressing circuit 14 inside. Reference numeral 15 is a relay unit, and a relay section 16 is provided inside. Reference numeral 17 denotes an interface unit, which internally has an interface section 1
8 are provided. Reference numeral 19 is a control unit, which is internally provided with a control command signal calculation unit 20.

Reference numeral 21 denotes each unit 1a, 1b, 11, 1
3, 15, 17, 19 and a container in which the filter capacitor 9 is housed, 22 is a mounting contact provided in the container 21 for introducing a command signal of the electric vehicle into the container 21, and 23 is a relay unit 15 Is a cannon plug used when connecting the control wiring 24 via the mounting contact 22, 25 is each unit 1a, 1b, 11,
A connector appropriately provided for connecting the control wiring 24 between 13, 15, 17, and 19 is a main circuit terminal block for connecting the main circuit wiring from the power supply section of the electric vehicle to the container 21, and 27 is From this main circuit terminal block 26 to each unit 1a,
1b, 11, 13, and common bus lines connected to the filter capacitor 9 respectively. Also, each unit 1
All of the control wiring 24 and the common bus wiring 27 which are wirings between a, 1b, 11, 13, 15, 17, 17, and 19 and the filter capacitor 9 are housed in the container 21.

FIG. 11 and FIG. 12 are a side view and a sectional view showing a configuration in which the electric vehicle-mounted inverter device described above is installed in the electric vehicle. As shown in FIG. 11, the container 21 is installed under the floor of the electric vehicle main body 28, and as shown in FIG. 12, the container 21 is provided with the main circuit terminal block 26 in the mounting duct 10 provided under the floor of the electric vehicle main body 28. They are connected to each other via the wirings 29.

Next, a method of manufacturing the electric vehicle-mounted inverter device configured as described above will be described. First,
Each unit 1a, 1b, 11, 13, 15, 17, 19
And various types of units of the filter capacitor 9 are formed. Next, each unit 1a, 1b, 11, 1
3, 15, 17, and 19 and the filter condenser 9 are housed in the container 21 at desired positions. Next, the control wiring 24 and the common bus wiring 27 between the units 1a, 1b, 11, 13, 15, 17, and 19 and the filter capacitor 9 are connected as shown in FIG. Next, after performing a test at the time of shipment to determine that it is normal,
Manufacture of the electric vehicle mounted inverter device is completed.

[0007]

Since the conventional electric vehicle-mounted inverter device is constructed as described above, various types of units 1a, 1b, 11, 13, 15, 17, 17 are provided.
9 and the filter capacitor 9 are respectively formed,
All of the units 1a, 1b, 11, 13, 15, 1 are stored in a container 21 in a narrow space inside the container 21.
Control wiring 24 between 7, 19 and the filter capacitor 9
Since many wirings of the common bus wiring 27 have to be respectively connected, workability is poor, and various types of units 1a, 1b, 11, 13, 15, 17, 19 and the filter capacitor 9 are required. Therefore, there is a problem in that the wasted space is increased and the size of the apparatus itself is increased.

Further, as described above, all the units 1a, 1
b, 11, 13, 15, 17, and 19 and the filter capacitor 9 are housed in the container 21, and after the wirings of the control wiring 24 and the common bus wiring 27 are connected, a test at the time of shipment is performed to determine whether or not they are normal. Because you have to judge
There is a problem that the manufacturing period becomes long and the cost of the device itself becomes high.

Further, even during maintenance, the control wiring 2 is used when removing a unit requiring maintenance.
4 and the common bus bar wiring 27, it is necessary to remove a large number of wirings, and there is a problem that workability is reduced.

The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the size, shorten the manufacturing period, improve the working efficiency at the time of manufacturing and maintenance, and form at low cost. It is an object of the present invention to provide an inverter device for mounting on an electric vehicle that can perform the operation.

[0011]

Means for Solving the Problems Claim 1 according to the present invention.
The electric vehicle on-board inverter device described above includes a plurality of power units that house main circuit components and control components that control the main circuit components according to control command signals, and distribution components and distribution components that distribute the command signals of the electric vehicle to each power unit. A common control unit accommodating an interface component for converting the generated command signal into a control command signal and transmitting it to each power unit is provided in one container, and each power unit and the common control unit are connected by a control command signal wiring. It was done like this.

According to a second aspect of the present invention, there is provided an inverter device for mounting on an electric vehicle according to the first aspect, wherein each power unit has a terminal block for connecting a main circuit wiring between a power source section of the electric vehicle and each power unit. Each one is equipped with it.

According to a third aspect of the present invention, there is provided an electric vehicle-mounted inverter device according to the first or second aspect, in which wiring for a main circuit component and a control component housed in the same power unit is wired. It was done in-house.

According to a fourth aspect of the present invention, there is provided an electric vehicle-mounted inverter device according to any one of the first to third aspects, in which main circuit components housed in the same power unit are provided via a circuit board. It is formed and the main circuit parts are wired on the circuit board.

According to a fifth aspect of the present invention, there is provided an electric vehicle mounted inverter device according to any one of the first to fourth aspects, further comprising a cooler for cooling the semiconductor element of the main circuit components. The semiconductor element is arranged by using both sides of the heat exchange section of the cooler.

According to a sixth aspect of the present invention, there is provided an electric vehicle-mounted inverter device according to any one of the first to fifth aspects, wherein an evaporation section provided in the power unit is included,
A heat pipe-type cooler for cooling the main circuit parts consisting of a condenser part provided outside the power unit and connected to the evaporator part using a heat pipe, and the evaporator part is placed horizontally in the power unit, The heat pipe is formed by bending so that the condensing part has a desired angular positional relationship with the evaporating part.

According to a seventh aspect of the present invention, there is provided an electric vehicle mounted inverter device according to any one of the first to sixth aspects, in which the filter capacitor formed of a rectangular parallelepiped main circuit component is used as a power unit. The filter capacitor is mounted on the bottom of the power unit so that the shortest side of the filter capacitor is perpendicular to the bottom surface of the power unit.

According to a eighth aspect of the present invention, there is provided an electric vehicle-mounted inverter device according to any one of the first to seventh aspects, in which the lid on the upper surface of the power unit is arranged via an insulator. The metal body is used as a resistor for suppressing overvoltage.

According to a ninth aspect of the present invention, there is provided an electric vehicle-mounted inverter device according to any one of the first to eighth aspects, in which the power unit and the common control unit are shaped such that both units are connected in a continuous direction. On the other hand, the vertical cross-sectional shape is the same.

[0020]

The inverter device for mounting on an electric vehicle according to claim 1 of the present invention is formed of two types of a power unit and a common control unit.

The terminal block of the power unit according to the second aspect of the present invention is connected to the power source section of the electric vehicle for each power unit via the main circuit wiring.

Further, the wiring between the main circuit component and the control component housed in the same power unit according to claim 3 of the present invention is formed only in the power unit.

In the circuit board according to the fourth aspect of the present invention, the main circuit component is formed therethrough and also functions as wiring.

Further, the semiconductor elements formed on both sides of the heat exchange portion of the cooler according to the fifth aspect of the present invention are efficiently formed.

Further, since the evaporating portion of the heat pipe type cooler according to the sixth aspect of the present invention is formed horizontally, other parts in the power unit are efficiently accommodated.

The filter capacitor according to claim 7 of the present invention is horizontally mounted at the bottom of the power unit.

The lid of the power unit according to claim 8 of the present invention also serves as an overvoltage suppressing resistor.

Further, the container accommodating the power unit and the common control unit according to claim 9 of the present invention is simplified because the shapes of the power unit and the common control unit are the same in the cross-sectional shape in the direction perpendicular to the connecting direction of both units. It

[0029]

【Example】

Embodiment 1 FIG. Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view showing a configuration of an electric vehicle-mounted inverter device according to a first embodiment of the present invention, and FIG. 2 is a diagram for explaining wiring between respective units of the electric vehicle-mounted inverter device shown in FIG. 3 and 4 are perspective views and cross-sectional views for explaining the configuration of the power unit of the electric vehicle mounted inverter device shown in FIG. 1, and FIG. 5 is a common control unit of the electric vehicle mounted inverter device shown in FIG. 4 is a cross-sectional view for explaining the configuration of FIG.

In the figure, the same parts as those in the above-mentioned conventional case are designated by the same reference numerals and the description thereof will be omitted. Reference numerals 30a and 30b denote power units. The units 30a and 30b respectively include a semiconductor element 31 as a main circuit component, a filter capacitor 9 and a voltage detection sensor 12 as a control component, an overvoltage suppressing circuit 14, and a control command signal computing unit 20. Has been formed. The filter capacitor 9 is the power unit 3
The shortest side is the power unit 30 at the bottom of 0a and 30b.
It is placed so as to be perpendicular to the bottom surfaces of a and 30b.

The semiconductor element 31 is arranged by using both sides of the base 33 as an evaporation portion of the heat pipe cooler 32 for cooling the semiconductor element 31. Reference numeral 34 denotes a radiation fin as a condensing portion of the heat pipe cooler 32, which is connected to the base 33 via the heat pipe 35 and is formed outside the power units 30a and 30b. At this time, the base 33 is connected to the power units 30a, 30
The heat radiating fins 34 are formed by horizontally placing the heat pipes 35 on the inside of the base plate b and forming a desired angle with respect to the base 33, for example, 7 °. Therefore, the efficiency of refrigerant circulation is improved as in the conventional case.

Reference numeral 36 denotes a main circuit terminal block provided in the power units 30a and 30b for connecting a power wiring portion 37 as main circuit wiring from the power source section of the electric vehicle into the power units 30a and 30b, and 38 denotes this main circuit terminal. A circuit board having a high withstand voltage and a large current, which is connected to the base 36 and is used for wiring in the power units 30a and 30b, and through which the filter capacitor 9, the voltage detection sensor 12, the overvoltage suppressing circuit 14, and the semiconductor element 31 are connected. Each is formed. Reference numeral 39 denotes a lid attached to the upper surfaces of the power units 30a and 30b to prevent foreign matter from entering.
It is made up of a mesh-shaped metal body arranged via, and this metal body is used as an overvoltage suppressing resistor of the overvoltage suppressing circuit 14.

Reference numeral 41 denotes a common control unit, which includes a relay section as a distribution component for distributing the command signal of the electric vehicle to the power units 30a and 30b, and the distributed command signal converted into a control command signal for each power unit 30a, 30b
The interface unit for transmitting to the printer is composed of a plurality of print cards, and a card rack 42 in which the print cards are stored is built in. Reference numeral 43 denotes a container in which the power units 30a and 30b and the common control unit 41 are respectively housed, and 44 denotes a mounting contact provided in the container 43 for introducing a command signal of the electric vehicle into the container 43.

Reference numeral 45 is a cannon plug used when the common control unit 41 connects the control wiring 46 through the mounting contact 44, and 47 is the container wiring 43 in which the mounting wiring 37 from the power supply section of the electric vehicle is connected. Cleats provided in the container 43 for introduction, 48 are units 30a, 30b,
It is a connector appropriately provided for connecting the control wiring 46 between 41. The units 30a, 30b, 41 have the same cross-sectional shape in the direction perpendicular to the direction in which the units 30a, 30b, 41 are arranged in series.
The shape of the container 43 is simplified.

Next, a method of manufacturing the electric vehicle-mounted inverter device configured as described above will be described. First,
Two types of units, the power units 30a and 30b and the common control unit 41, are formed respectively. Inside the power units 30a and 30b, a heat pipe type cooler 32
Since the base 33 is horizontally mounted, it is possible to increase the internal storage density. Therefore, the filter capacitor 9, the voltage detection sensor 12, and the overvoltage suppressing circuit 14 can also be efficiently stored in the power units 30a and 30b. You can Further, since the semiconductor elements 31 are arranged on both sides of the base 33, the storage space is effectively used. Further, the filter capacitor 9, the voltage detection sensor 1
2. Since the overvoltage suppressing circuit 14 and the semiconductor element 31 are formed via the circuit board 38, they can be easily connected to each other. Further, since the filter capacitor 9 which is heavy and generates less heat is placed at the bottom of the power units 30a and 30b as shown in FIGS. 3 and 4, the power units 30a and 30b can be stably formed, and the semiconductor It is possible to prevent the parts that generate heat such as the element 31 from being formed at the bottom and to effectively cool the semiconductor element 31.

Next, since the main circuit parts and the control parts for controlling the main circuit parts are housed in the power units 30a and 30b, respectively, each power unit 30
It is possible to perform a test at the time of shipment every time the a and 30b are assembled to determine whether or not they are normal. Next, the power units 30a and 30b and the common control unit 4 are placed in the container 43.
1 is stored in each of the units 30a, 30b, 41
The control wirings 46 are connected to each other as shown in FIG. At this time, the control wiring 46 connects the power units 30a,
2 for connecting 30b and the common control unit 41, respectively
Only the wiring of the book is provided, and there is no wiring between the units 30a, 30b, 41 from the power supply section of the electric vehicle in the container 43. Then, the manufacturing of the electric vehicle-mounted inverter device is completed.

The inverter device for mounting on an electric vehicle according to the first embodiment having the above-described structure is provided with power units 30a, 30.
After forming two types of units, b and the common control unit 41, they are all housed in the container 43, and only the two wirings of the control wiring 46 between the power units 30a and 30b and the common control unit 41 are connected. You only have to do it,
Work efficiency can be improved.

Further, since the main circuit components and the control components for controlling the main circuit components are housed in the power units 30a and 30b, respectively, when the assembly of one power unit 30a is completed, a test at the time of shipment is performed in parallel. Since the other power unit 30b can be assembled, the manufacturing period can be shortened and the cost can be reduced.

Also, at the time of maintenance, at the time of removing a unit requiring maintenance, at most 2.
Since it can be performed only by removing the wiring of the control wiring 46 of the book, the workability can be improved.

Further, the power units 30a and 30b increase the internal storage density and store various parts as shown in FIGS. 3 and 4, and are formed by one power unit 30a and 30b. 30a,
Since only two types of units, 30b and the common control unit 41, are stored and wasteful space is reduced, the device can be downsized.

Example 2. In the first embodiment, the units 30a, 30b, 41 in the container 43 are housed as shown in FIGS. 1 and 2, and the main circuit terminal block 36 of the power units 30a, 30b is formed on the same side of the container 43. However, the present invention is not limited to this, and as shown in FIG. 6, each unit 30a, 30b, 41 is housed in a container 43, and the main circuit terminal block 3 of the power units 30a, 30b is stored.
6 may be provided so as to face the inside of the container 43. Further, the present invention is not limited to these examples, and it goes without saying that the main circuit terminal block 36 may be provided on either side of the container 43.

Embodiment 3 FIG. Further, in each of the above-described embodiments, an example in which the common control unit 41 is arranged between the power units 30a and 30b has been shown, but the invention is not limited to this, and the common control unit 41 may be installed in the container 43 as shown in FIG. It goes without saying that it may be arranged at one end.
Further, the present invention is not limited to these examples, and the power units 30a and 30b and the common control unit 41 are provided in the container 43.
It goes without saying that the arrangement may be arranged in any manner.

[0043]

As described above, according to claim 1 of the present invention, a plurality of power units accommodating a main circuit component and a control component for controlling the main circuit component by the control command signal and a command signal for an electric vehicle are transmitted. A common control unit accommodating a distribution component for distributing to each power unit and an interface component for converting the distributed command signal into a control command signal and transmitting the control command signal to each power unit is provided in one container, and each power unit and the common control unit Since they are connected to each other by the control command signal wiring, they can be miniaturized because they are formed by two types of units, the power unit and the common control unit. Further, since it is possible to perform a test for each power unit, it is possible to provide an inverter device for mounting on an electric vehicle, which improves work efficiency during manufacturing and maintenance and is low in cost.

According to a second aspect of the present invention, in the first aspect, each power unit is provided with a terminal block for connecting the main circuit wiring between the power source section of the electric vehicle and each power unit. Since the wiring for connecting the power supply unit and each power unit can be erased, the work efficiency at the time of manufacturing and maintenance is further improved, and the inverter device mounted on the electric vehicle that is even lower in cost is provided. It becomes possible to provide.

According to claim 3 of the present invention, in claim 1 or claim 2, the wiring between the main circuit component and the control component housed in the same power unit is performed in the power unit. Since the wiring inside the container is only the control command signal wiring that connects each power unit and the common control unit, the working efficiency during manufacturing and maintenance is further improved, and the cost is lower on the electric vehicle. It is possible to provide a power inverter device.

According to claim 4 of the present invention, in any one of claims 1 to 3, main circuit components housed in the same power unit are formed via a circuit board, and the main circuit parts are formed on the circuit board. Since the main circuit parts and the control parts are wired, it is possible to easily connect the main circuit parts, so that the working efficiency is further improved and the inverter device for mounting on the electric vehicle is further downsized. It becomes possible.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a cooler for cooling the semiconductor element of the main circuit component is provided, and the heat exchange section of the cooler is provided. Since the semiconductor element is arranged by using both sides of the heat exchanging portion, the semiconductor element is arranged by using both sides of the heat exchanging portion, so that the semiconductor element can be efficiently formed, and an inverter device for mounting on an electric vehicle which is further miniaturized Is possible.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the evaporation unit provided in the power unit and the evaporation unit connected to each other by using a heat pipe are provided outside the power unit. Equipped with a heat pipe type cooler for cooling the main circuit parts consisting of the provided condensation section, the evaporation section is placed horizontally in the power unit,
The heat pipe is bent so that the condensing part is in a desired angular position with respect to the evaporating part, so the evaporating part is placed horizontally in the power unit and the space other than the evaporating part in the power unit is effectively used. Therefore, it becomes possible to provide a further miniaturized inverter device for mounting on an electric vehicle.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a filter capacitor formed of a rectangular parallelepiped among the main circuit components is provided at the bottom of the power unit. Since the capacitor was placed so that the shortest side of the capacitor was perpendicular to the bottom surface of the power unit and was placed on the bottom of the filter capacitor, which is heavier than other parts, the power unit can be formed stably. Further, since it is possible to prevent the heat-generating components of the main circuit components from being formed at the bottom of the power unit, it is possible to provide an inverter device for mounting on an electric vehicle that can effectively cool the inside of the power unit. Become.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the lid on the upper surface of the power unit is made of a mesh-shaped metal body arranged via an insulator. Since the metal body is used as a resistor for overvoltage suppression, the mesh-shaped metal body serves as a lid for the power unit to prevent foreign matter from entering from the outside, and at the same time, serves as an overvoltage suppressing resistor for an electric vehicle. Can be provided.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the shape of the power unit and the common control unit is a cross section in a direction perpendicular to a direction in which both units are connected. Since the shapes are the same, it is possible to provide the electric vehicle-mounted inverter device that can simplify the shape of the container that houses both units.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an electric vehicle-mounted inverter device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining wiring between each unit of the electric vehicle-mounted inverter device shown in FIG.

FIG. 3 is a perspective view for explaining a configuration of a power unit of the electric vehicle-mounted inverter device shown in FIG. 1.

FIG. 4 is a cross-sectional view for explaining the configuration of a power unit of the electric vehicle-mounted inverter device shown in FIG.

5 is a cross-sectional view for explaining a configuration of a common control unit of the electric vehicle-mounted inverter device shown in FIG.

FIG. 6 is a top view showing the configuration of an electric vehicle-mounted inverter device according to a second embodiment of the present invention.

FIG. 7 is a top view showing the configuration of an electric vehicle-mounted inverter device according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing a configuration of a conventional electric vehicle-mounted inverter device.

9 is a diagram for explaining wiring between each unit of the electric vehicle-mounted inverter device shown in FIG. 8. FIG.

10 is a cross-sectional view for explaining a configuration of a semiconductor unit of the electric vehicle-mounted inverter device shown in FIG.

FIG. 11 is a side view showing a configuration in which an electric vehicle-mounted inverter device is installed in an electric vehicle.

FIG. 12 is a cross-sectional view showing a configuration in which an electric vehicle-mounted inverter device is installed in an electric vehicle.

[Explanation of symbols]

9 Filter capacitor, 12 Voltage detection sensor, 14
Overvoltage suppression circuit, 20 Control command signal calculation unit, 30
a, 30b power unit, 31 semiconductor element, 32
Heat pipe type cooler, 33 base, 34 radiating fins, 35 heat pipe, 36 main circuit terminal block, 37
Wiring wiring, 38 circuit board, 39 lid, 40 insulator, 41 common control unit, 42 card rack, 4
3 containers, 46 control wiring.

Claims (9)

[Claims] 1. A plurality of power units accommodating a main circuit component and a control component for controlling the main circuit component according to a control command signal, a distribution component for distributing a command signal of an electric vehicle to each of the power units, and a distribution component. A common control unit accommodating an interface component for converting a command signal into the control command signal and transmitting the control signal to each power unit is provided in one container, and each power unit and the common control unit are respectively connected by control command signal wiring. An inverter device for mounting on an electric vehicle, characterized by being connected. 2. A terminal block for connecting a main circuit wiring between a power source section of an electric vehicle and each power unit is provided for each of the power units.
The inverter device for mounting on the electric vehicle described. 3. The electric vehicle mounting according to claim 1 or 2, wherein wiring between the main circuit component and the control component housed in the same power unit is performed in the power unit. Inverter device. 4. A main circuit component housed in the same power unit is formed via a circuit board, and wiring of the main circuit component is performed on the circuit board. The inverter device for mounting on an electric vehicle according to claim 3. 5. A cooler for cooling a semiconductor element of the main circuit component is provided, and the semiconductor element is arranged by using both surfaces of a heat exchange portion of the cooler.
The inverter device for mounting on an electric vehicle according to claim 4. 6. A heat pipe type for cooling a main circuit component including an evaporation portion provided inside the power unit and a condensation portion connected to the evaporation portion using a heat pipe and provided outside the power unit. A condenser is provided, the evaporating section is horizontally placed in the power unit, the heat pipe is bent, and the condensing section is formed so as to have a desired angular positional relationship with respect to the evaporating section. The inverter device for mounting on an electric vehicle according to any one of claims 1 to 5. 7. A filter capacitor formed of a rectangular parallelepiped among the main circuit components is mounted on the bottom of the power unit so that the shortest side of the filter capacitor is perpendicular to the bottom of the power unit. The inverter device for mounting on an electric vehicle according to any one of claims 1 to 6. 8. The lid of the upper surface of the power unit is composed of a mesh-shaped metal body arranged via an insulator, and the metal body is used as an overvoltage suppressing resistor. The inverter device for mounting on an electric vehicle according to any one of claims 1 to 7. 9. The power unit and the common control unit have the same sectional shape in a direction perpendicular to a direction in which the two units are connected to each other. The inverter device for mounting on an electric vehicle according to item 1.