JPH06245542A - Integrated inverter device for vehicle - Google Patents

Abstract

PURPOSE:To reduce the size of a device, to enhance the waterproofing property, and to make the fittability better by casing a printed wiring board, a part of a connector, and a semiconductor module with a lower case and an upper case. CONSTITUTION:A printed wiring board 1 and a semiconductor power module 2 are connected by soldering conductors on the printed wiring board 1 with the input-output terminals 3 of the semiconductor power module 2, and the printed wiring board 1 and a connector 4 are connected by soldering conductors on the printed wiring board 1 with the terminals 5 of the connector 4. Besides, the semiconductor power module 2 ia fixed so that its heat-radiating surface 6 may touch a lower case 7. The lower case 7 and an upper case 8 are connected through the medium of a heat-transmitting sealing member 9 and fixed, and case the printed wiring board 1, the semiconductor power module 2, and a part of the connector 4 at the same time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device mounted on an automobile.

[0002]

2. Description of the Related Art A conventional inverter device of this type includes a general-purpose industrial inverter which is generally commercially available. In the general-purpose inverter as shown in FIG. 5, as a measure for cooling the semiconductor power module 2, the temperature of the semiconductor power module 2 is reduced by bringing the heat radiation surface into contact with the heat radiation fin 10 and cooling the heat radiation fin 10 with the cooling fan 14. It is suppressing the rise. The semiconductor power module 2, the printed wiring board 1, and the terminal block 13 are connected by the wire harness 15, and the power source and the load are connected by screws on the terminal block 13. Further, the upper case 8 is not involved in heat dissipation of the semiconductor power module 2.

[0003]

In recent years, along with the development and commercialization of electric vehicles and the like, it has become necessary to mount an inverter device on automobiles. Examples thereof include an inverter device for driving a traveling motor and an inverter device for driving a compressor of an air conditioner. However, when the conventional inverter device as shown in FIG. 5 is mounted on an automobile, there are the following problems. First, it is too large to be installed in a limited space such as an automobile, or it occupies space for other devices. Secondly, since it is an open type, it is poorly waterproof and rain, etc. will infiltrate it. Thirdly, a screwdriver is required to connect to the power supply and load, and the wearability is poor. Fourthly, it requires a wire harness inside and a cooling fan, so the cost is high.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object thereof is to provide an inverter device for an automobile, which is small in size, waterproof, easy to install, low in cost and highly reliable.

[0005]

In order to solve the above-mentioned problems, an automobile-integrated inverter device according to the present invention comprises: (1) a pseudo AC voltage in the form of a positive or negative rectangular pulse train for the voltage input from a battery or a generator. To control and drive the electric motor to incorporate a printed wiring board, a connector whose terminals are directly connected to conductors on the printed wiring board, a plurality of semiconductor switching elements, and a heat radiation surface and an input / output terminal. And also plays a role in casing the semiconductor power module in which the input / output terminals are directly connected to the conductor on the printed wiring board, the printed wiring board, a part of the connector, and the semiconductor power module, and A lower case that is in contact with the heat dissipation surface of the semiconductor power module on the inner surface and that has a heat dissipation fin that is integrally molded; A lower case is provided with an upper case that constitutes the casing of the semiconductor module and the printed wiring board, a part of the connector.

(2) The contact surface between the lower case and the upper case of the integrated inverter device for an automobile according to claim 1 absorbs unevenness of the contact surface to enhance sealing performance, and from the lower case to the upper case. A heat conductive seal member for enhancing heat transfer is interposed.

(3) The upper case of the integral type inverter device for an automobile according to the first and second aspects is also provided with a radiating fin integrally formed.

(4) The driving wind of a vehicle introduced directly or indirectly is applied to the upper case or the lower case of the integrated inverter device for an automobile according to claims 1, 2, and 3.

(5) A ventilation hole is provided in each of the upper case and the lower case of the integrated inverter device for an automobile according to claim 1, 2, 3 and 4, and a vacuum hose of the vehicle is provided in either one of the ventilation holes. It is designed to be connected.

[0010]

The present invention has the above-described structure. (1) The connector is used for connection to the outside, and the printed wiring board, the connector, and the semiconductor power module are directly connected to each other without a wire harness. Therefore, the lower case is shared with the heat radiation fins, so that the size and cost can be reduced.

(2) Since the heat conductive seal member is interposed between the contact surfaces of the lower case and the upper case, the waterproof property can be improved, and the upper case also plays a role of heat dissipation, so that the heat dissipation of the lower case is achieved. The fins can be made smaller, and the size and cost can be reduced.

(3) Since the upper case is also provided with the integrally formed heat radiation fins, the upper case also plays a role of heat radiation,
Since a large heat radiation area is secured as a whole, the fins can be made smaller and the size can be reduced.

(4) The traveling wind of the vehicle introduced directly or indirectly to the upper case or the lower case is applied to the upper case or the lower case, so that the heat radiation efficiency is improved, the heat radiation fins are reduced, and the size and cost can be reduced. .

(5) Since the upper case and the lower case are provided with ventilation holes, respectively, and the vacuum hose of the vehicle is connected to either one of the ventilation holes, heat is prevented from staying inside. The temperature rise of the internal atmosphere can be suppressed, and the reliability can be improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An automobile integrated inverter device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an integrated inverter device for an automobile according to an embodiment of the present invention (taken along the plane A in FIG. 2).
Is. The printed wiring board 1 and the semiconductor power module 2 are connected by soldering the conductor on the printed wiring board 1 and the input / output terminal 3 of the semiconductor power module 2, and the printed wiring board 1 and the connector 4 are connected. The connection is made by soldering the conductor on the printed wiring board 1 and the terminal 5 of the connector 4.

With such a configuration, the wiring of the printed wiring board 1, the semiconductor power module 2, and the connector 4 can be saved, and an external power source or load can be connected via the connector 4 with one touch. I can.

The semiconductor power module 2 is fixed to the lower case 7 so that the heat radiation surface 6 is in contact therewith. The lower case 7 and the upper case 8 are connected and fixed via a heat conductive seal member 9, and at the same time, the printed wiring board 1
The semiconductor power module 2 and a part of the connector 4 are casing.

With such a structure, the heat generated from the semiconductor power module 2 during the operation of the inverter device is transferred from the lower case 7 to the upper case 8 through the radiating fins 10 which are integrally formed in each case. The heat is efficiently dissipated into the outside air and the waterproof property is secured.

Reference numeral 11 is a minute vent hole provided in each of the lower case 7 and the upper case 8, one of which is connected to the vacuum hose 12, whereby a minute flow of air is generated and the inside of the inside is generated. It is possible to prevent heat retention. Further, since the ventilation holes 11 are minute, infiltration of rain or the like has been confirmed by experiments, and the waterproofness is not deteriorated.

By disposing the integrated type inverter device 16 in a place as shown in FIG. 4 and applying traveling wind, the heat radiation effect can be further enhanced. When the vehicle is stopped and there is no running wind, it is advisable to apply the wind of the fan 17 for the outdoor heat exchanger of the air conditioner.

FIG. 2 is an external view of an automobile integrated inverter device according to an embodiment of the present invention, and FIG. 3 is a configuration diagram.

[0023]

As described above, the automobile-integrated type inverter device according to the present invention includes: (1) converting an electric voltage input from a battery or a generator into a positive / negative rectangular pulse train-like pseudo AC voltage to drive an electric motor. Controlled driving, a printed wiring board, a connector whose terminals are directly connected to conductors on the printed wiring board, a plurality of semiconductor switching elements are built-in, and a heat radiation surface and an input / output terminal are provided. A semiconductor power module directly connected to a conductor on the printed wiring board, and a part for casing the printed wiring board, a part of the connector and the semiconductor power module, and a heat dissipation surface of the semiconductor power module. And the lower case, which is in contact with the inner surface of the lower case and has integrally formed heat radiation fins, and the lower case. Since the wiring board, the part of the connector, and the upper case forming the casing of the semiconductor module are provided, it is possible to provide a small-sized, easy-to-install, low-cost inverter device for an automobile.

(2) On the contact surface between the lower case and the upper case, there is a heat conductive seal member for absorbing unevenness of the contact surface to improve the sealing property and to improve heat transfer from the lower case to the upper case. Therefore, it is possible to provide a small-sized, waterproof, and low-cost inverter device for an automobile.

(3) Since the upper case is also provided with the radiating fins integrally formed, it is possible to provide a small inverter device for an automobile.

(4) Since the traveling wind of the vehicle introduced directly or indirectly is applied to the upper case or the lower case, it is possible to provide a small-sized and low-cost inverter device for an automobile.

(5) Since the upper case and the lower case are each provided with ventilation holes, and the vacuum hose of the vehicle is connected to either one of the ventilation holes, a highly reliable inverter device for automobiles can be provided. Can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an automobile integrated inverter device according to an embodiment of the present invention.

FIG. 2 is an external perspective view of an automobile integrated inverter device according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view of an automobile integrated inverter device according to an embodiment of the present invention.

FIG. 4 is a configuration diagram showing an arrangement of an integrated inverter device for an automobile according to an embodiment of the present invention.

FIG. 5 is an exploded perspective view of a conventional general-purpose inverter

[Explanation of symbols]

 1 Printed Circuit Board 2 Semiconductor Power Module 3 Input / Output Terminals of Semiconductor Power Module 4 Connector 5 Connector Terminal 6 Heat Dissipating Surface of Semiconductor Power Module 7 Lower Case 8 Upper Case 9 Heat Conductive Sealing Member 10 Radiating Fin 11 Vent Hole 12 Vacuum Hose 13 Terminal block 14 Cooling fan 15 Wire harness 16 Integrated inverter device 17 Outdoor heat exchanger fan 18 Electric compressor 19 Indoor heat exchanger

Claims (5)

[Claims] Claim: What is claimed is: 1. A voltage input from a battery or a generator is converted into a positive / negative rectangular pulse train-like pseudo AC voltage to control and drive an electric motor, and a terminal is connected to a printed wiring board and a conductor on the printed wiring board. And a semiconductor power module in which a plurality of semiconductor switching elements are built in, a heat dissipation surface and an input / output terminal are provided, and the input / output terminal is directly connected to a conductor on the printed wiring board, A lower case which plays a role in casing the semiconductor power module with the printed wiring board, a part of the connector, and which is in contact with the heat dissipation surface of the semiconductor power module at the inner surface and has a heat dissipation fin integrally molded. And the lower case, the printed wiring board, a part of the connector, and the semiconductor module casing. Integrated inverter device for a motor vehicle equipped with a upper case forming. 2. A heat-conducting seal member is provided on the contact surface between the lower case and the upper case to absorb irregularities of the contact surface to enhance the sealing property and to enhance heat transfer from the lower case to the upper case. The integrated inverter device for an automobile according to claim 1. 3. The integrated inverter device for an automobile according to claim 1, wherein the upper case is also provided with a radiation fin that is integrally formed. 4. The integrated inverter device for an automobile according to claim 1, wherein the traveling wind of the vehicle introduced directly or indirectly is applied to the upper case or the lower case. 5. An automobile according to claim 1, wherein the upper case and the lower case are each provided with a ventilation hole, and a vacuum hose of the vehicle is connected to one of the ventilation holes. Body type inverter device.