JP2002119068A - Inverter device for power - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power module for inverter that allows the reduction of the scale of circuits and the simplification of equipment manufacturing work. SOLUTION: A pin terminal 170 internally wired within an inverter module 1 is added to terminal P a direct-current high level of the internally threaded terminal of the inverter module 1 for power within in the pin terminal group 17 for control communication of the inverter module 1 for power, and a controller 2 is supplied with supply through the pin terminal 170.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a power inverter device.

[0002]

2. Description of the Related Art A power inverter module in which a three-phase inverter circuit for driving a large three-phase AC load such as a three-phase AC motor by a DC power source such as a battery is sealed in a resin package, and the power inverter module is controlled. 2. Description of the Related Art A power inverter device including an inverter controller is frequently used for driving an AC motor.

FIG. 5 shows an example of a conventional power inverter module.

In FIG. 5, 1 is a power inverter module, 2 is a control device for controlling the power inverter module 1, 21 is an inverter controller in the control device, and 3 is a data communication having female connectors 4 at both ends. Multi-core cable. The power inverter module 1 is configured by sealing a well-known three-phase inverter circuit in a resin package.

The three-phase inverter circuit in the power inverter module 1 has a well-known circuit configuration having a total of six switching elements 11. Reference numeral 16 denotes a female screw terminal group of the power inverter module 1, and 17 denotes a pin terminal group of the power inverter module 1.

The female screw terminal group 16 includes a high DC terminal P connected to a positive terminal of the vehicle battery by a bus bar (not shown), a low DC terminal N connected to a negative terminal of the vehicle battery by a bus bar (not shown), and a power cable (not shown). The three-phase AC motor has three-phase AC terminals U, V, and W that are individually connected to armature coil terminals of each phase.

The control device 2 includes a printed circuit board 20 and a hybrid IC mounted on the printed circuit board 20.
Controller 21 and male connector 2
Two. The male connector 22 is supplied with electric power through the female connector 5, the multi-core data communication cable 3 provided at one end of the multi-core data communication cable 3, and the male connector 4 provided at the other end of the multi-core data communication cable 3. Terminal group 17 of the inverter module 1.

Each upper-arm switching element 11 receives a gate control voltage based on a source potential, and each lower-arm switching element 11 receives a gate control voltage based on a DC lower terminal N. Power is supplied through the cable 3 and the pin terminal group 17.

Usually, the control circuit board 20 has an IC structure.
The inverter controller 21 mounted on the control circuit board 20 includes a DC high-order terminal P which is a female screw terminal of the power inverter module 1 disposed close to or mounted on the control circuit board 20.
Power was supplied from the power cable 100 to the power cable connector 23 on the control circuit board 20. 22 is a male connector for data communication mounted on the control circuit board 20,
Reference numerals 4 and 5 denote female connectors at both ends of the multi-core cable 3 for data communication.

[0010]

However, in order to lower the DC power supply voltage from the DC high-level terminal P, which is the female screw terminal of the power inverter module 1 to the connector on the control circuit board 20, as described above, There is a problem in that the addition of the above-mentioned components such as cables and connectors and the connection work thereof are required, the circuit scale becomes large, and the work becomes troublesome.

The power supply to the low DC terminal of the control circuit board 20 and the inverter controller 21 is supplied to the inverter controller 21 for forming the control voltage of the lower arm side switching element 11. Unlike the case where the high power supply potential is supplied to the inverter controller 21, no wiring or connection is required.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide an inverter power module that can simplify a circuit scale and a device manufacturing operation.

[0013]

According to a first aspect of the present invention, there is provided a power inverter device including a power inverter module having a plurality of inverter circuits each having a plurality of upper-arm-side and lower-arm-side power switching elements; And a control circuit board on which an inverter controller connected to the power inverter module through a multi-core cable and a connector or by direct soldering is mounted, and the power inverter module is connected to a main electrode of the power switching element. A predetermined number of power terminals which are internally connected and are exposed on the outer surface of the module and are each formed of a female screw terminal connected to an external DC power supply and an AC load through a bus bar or a power cable, and a control electrode of the power switching element. Internally connected, projecting to the outer surface of the module A predetermined number of control terminals connected to the control circuit board through the data communication multi-core cable and connector or directly by soldering, and internally connected to a lower-side main electrode of the lower arm-side power switching element. And a DC low terminal protruding from the outer surface of the module and connected through the data communication multi-core cable and the connector or directly by soldering, in the power inverter device, A DC high-level terminal that is internally connected to the main electrode on the side and protrudes from the outer surface of the module and that is connected through the data communication multi-core cable and connector or directly by soldering to supply control power to the control circuit. It is characterized by:

The data communication multi-core cable is
A round multicore control cable or a tape-like flexible cable may be used.

That is, in the power inverter device of the present invention, the inverter controller mounted on the control circuit board is connected to the power inverter module connected to the control circuit board through the multi-core data communication cable and the connector or directly by soldering. Since the high-potential DC terminal for the control power supply is provided, it is not necessary to multiplex the cable for the power supply of the inverter controller to the high-potential terminal P of the power inverter module together with the busbar for the DC power supply. In addition, the wiring structure and wiring work can be simplified, and the connection reliability between the DC high-level terminal P and the bus bar or the power cable can be improved.

As described above, the power inverter module is connected to its control terminal or DC low terminal N and the control circuit board through a data communication multi-core cable and a connector or directly by soldering. However, even if the number of wirings increases by one, the increase in the wiring structure and wiring work can be substantially ignored.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the power inverter device of the present invention will be described below with reference to embodiments.

[0018]

First Embodiment A power inverter device according to a first embodiment will be described with reference to FIG. However, components having the same main functions as those of the above-described conventional power inverter device may be denoted by the same reference numerals for easy understanding.

Reference numeral 1 denotes a power inverter module for converting DC power received from a battery into three-phase AC power to supply power to a three-phase AC motor for driving a vehicle, and 2 denotes a control device for controlling the power inverter module 1. Reference numeral 3 denotes a multi-core data communication cable having female connectors 4 at both ends.

The power inverter module 1 is formed by sealing a well-known three-phase inverter circuit in a resin package. FIG. 2 is a plan view and FIG. 3 is a side view.

The three-phase inverter circuit in the power inverter module 1 includes three-phase upper-arm IGBT elements 11.
And lower arm side IGBT elements 12, three upper arm side gate control circuits 13 for individually controlling the upper arm side IGBT elements 11 of each phase, and the lower part for controlling the lower arm side IGBT elements 12 of each phase. Arm side gate control circuit 14
And a flywheel diode 15 individually and anti-parallel connected to each of the IGBT elements 11 and 12. Since the three-phase inverter circuit itself is already known, a detailed description is omitted.

Further, the power inverter module 1 comprises:
It has a group of female screw terminals 16 and a group of pin terminals 17 described below, which are arranged in a row and to which the female connector 4 is connected. The female screw terminal group 16 includes a DC high terminal P connected to a positive terminal of the vehicle battery by a bus bar (not shown), a DC low terminal N connected to a negative terminal of the vehicle battery by a bus bar (not shown), and three-phase AC by a power cable (not shown). It has three-phase AC terminals U, V, and W that are individually connected to armature coil terminals of each phase of the motor.

The control device 2 includes a printed circuit board 20 and a hybrid IC mounted on the printed circuit board 20.
Controller 21 and step-down DC not shown
-It has various circuits such as a DC converter module and a male connector 22. The male connector 22 is connected to the pin terminal group 1 of the power inverter module 1 through the female connector 5, the data communication multi-core cable 3, and the male connector 4.
7 is connected.

Each upper-arm gate control circuit 13 applies a gate control voltage input from the inverter controller 21 to the higher gate voltage input terminal 131 and the lower gate voltage input terminal 132 to the emitter reference voltage of the upper arm IGBT element 11. It has a circuit function for level shifting. Also,
It has a terminal 133 for transmitting the emitter potential of the upper arm side IGBT element 11 to the inverter controller 21. Therefore, each upper arm side gate control circuit 13 occupies three pin terminals of the pin terminal group 17 respectively.

The lower arm side gate control circuit 14 connects the lower arm side IGBT element 12 to each lower arm I
In order to control the emitter common potential of the GBT element as a reference, one high-side gate voltage input terminal 141, 142, 143 for each lower arm IGBT element 12 and a low-level gate input terminal 144 common to each phase are provided. The low gate input terminal 144 is connected to the DC low terminal N. Also, the lower arm side gate control circuit 14
Terminals 145 and 14 for monitoring the potential state of BT element 14
6. Therefore, the lower arm side gate control circuit 14 occupies each of the six pin terminals of the pin terminal group 17.

Further, the pin terminal group 17 includes a high DC terminal P
Has a pin terminal 170 connected thereto.

The pin terminals of the pin terminal group 17 are connected to the female connector 4, the multi-core control cable 3, the female connector 5, the male connector 22, and a printed wiring pattern (not shown) of the printed circuit board 20 through the inverter controller 21.
(Not shown).

A step-down DC-DC converter (not shown) is mounted on the control circuit board.
The converter reduces the battery voltage between the high DC terminal P and the low DC terminal N input from the pin terminal group 17 through the multi-core control cable 3 to a suitable voltage based on the potential of the DC low terminal N, for example, 5V. Thus, power is supplied as power supply voltage to the inverter controller 21 and the like.

(Effects of Embodiment) As described above, in this embodiment, the control circuit board 2 is mounted on the control circuit board 2 by utilizing the fact that the power supply current is small. The power supply voltage of the power inverter module 1 is supplied through the pin terminal group 17 and the multi-core cable 3 for data communication.

This eliminates the need for a special cable for feeding the DC high-level terminal P to the control circuit board 2 and increases the number of pins of the pin terminal group 17 and the number of wiring lines of the multi-core data communication cable 3 one by one. The power supply to the control circuit board 2 can be realized by simply performing the above operation.

[0031]

Second Embodiment A power inverter device according to a second embodiment will be described with reference to FIG. However, components having the same main functions as those of the above-described conventional power inverter device may be denoted by the same reference numerals for easy understanding.

In this power inverter device, NM is used as the switching element 11 of the power inverter module 1.
An OS transistor is employed, and a parasitic diode of the NMOS transistor 11 is used instead of the flywheel diode 15 of FIG. Also, the gate control circuits 13 and 14 in FIG. 1 are omitted, and the inverter controller 21 directly supplies the gate electrode of each NMOS transistor 11 with the potential of each source electrode reference.

Therefore, a total of six pin terminals are used for driving the gate of the upper arm NMOS transistor 11, and four pin terminals are used for driving the lower arm NMOS transistor 11.

Further, the pin terminal group 17 includes a high DC terminal P
Has a pin terminal 170 connected thereto. 171 is
This is a pin terminal connected to the DC lower terminal N for driving the lower arm side NMOS transistor 11.

As a result, the battery voltage between the DC high terminal P and the DC low terminal N is changed to the pin terminal group 170, 17
1, power is supplied to the inverter controller 21 as a power supply voltage, and the inverter controller 21 can be driven.

This eliminates the need for a special cable for feeding the DC high-level terminal P to the control circuit board 2, and increases the number of pins of the pin terminal group 17 and the number of wiring lines of the multi-core data communication cable 3 one by one. The power supply to the control circuit board 2 can be realized by simply performing the above operation.

[Brief description of the drawings]

FIG. 1 is a circuit diagram illustrating a power inverter device according to a first embodiment.

FIG. 2 is a plan view circuit diagram showing the power inverter module of FIG. 1;

FIG. 3 is a side view showing the power inverter module of FIG. 2;

FIG. 4 is a circuit diagram illustrating a power inverter device according to a second embodiment.

FIG. 5 is a circuit diagram showing a conventional power inverter device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Power inverter module 2 Printed circuit board (circuit board) 3 Multi-core cable for data communication 17 Pin terminal group 21 Inverter controller P, U, V, W, N Female screw terminal 170 Higher side pin for power supply to the inverter controller Terminal

Claims (1)

[Claims] 1. A power inverter module having a built-in inverter circuit having a plurality of power switching elements on an upper arm side and a lower arm side, respectively. A control circuit board on which an inverter controller connected to the inverter module is mounted, wherein the power inverter module is internally connected to a main electrode of the power switching element, is exposed on an outer surface of the module, and has a busbar or power. A predetermined number of power terminals each comprising a female screw terminal connected to an external DC power supply and an external AC load through a cable; and a data communication device which is internally connected to a control electrode of the power switching element and protrudes from the outer surface of the module. Multi-core cable and connector A predetermined number of control terminals connected to the control circuit board through or directly by soldering, and a lower-side main electrode of the lower arm-side power switching element, which is internally connected to and protrudes from the outer surface of the module, and A power inverter device comprising: a communication multi-core cable and a DC low terminal connected through a connector or directly by soldering; and a module internally connected to a high-side main electrode of the power switching element on the upper arm side. A power inverter device comprising: a DC high-level terminal that protrudes from an outer surface and is connected through the data communication multi-core cable and a connector or directly by soldering to supply control power to the control circuit.