JPH0365065A - Inverter apparatus - Google Patents

Abstract

PURPOSE:To simply prevent the oscillation and malfunction due to electromagnetic induction by reversing the power collector terminal and the power emitter terminal of a power transistor module according as they are used for the upper arm or lower arm of an apparatus. CONSTITUTION:Upper and lower arms are respectively constituted from a transistor module 1A, in which driving terminals 4, 5 positioned on one side of the module, a power collector terminal 2 and a power emitter terminal 3 are arranged in that order, and a transistor module 1 having the same rating and electric characteristics as those of the transistor module 1A, in which module 1 the driving terminals 4, 5, power emitter terminal 3 and power collector terminal 2 are arranged in that order, while the driving terminals 4, 5 of respective transistor modules 1A, 1 are so arranged as to be mutually on the same side and a plus power bar 7, a minus power bar 8 and an output bar 9 are further formed on the side opposite to the driving terminal 4, 5 side. In this manner, an apparatus is not easily subjected to the electromagnetic induction from power bus bar and the power transistor can be operated safely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inverter device in which upper and lower arms are constructed of transistor modules.

[Conventional technology]

Fig. 3 is a schematic diagram showing a conventional example of a transistor module, Fig. 4 is a circuit diagram showing a general example of an inverter circuit,
FIG. 5 is a configuration diagram showing an example of a conventional inverter configuration.

That is, as shown in FIG. 3, the power transistor module 1 is formed with a power collector terminal 2, a power emitter terminal 3, a drive base terminal 4, and a drive emitter terminal 5. Conventionally, when configuring such an inverter device, in order to reduce the inductance from the DC power source, the positive power bar, negative power bar, and output bar are placed close to each other.
For example, as shown in FIG. 5, two modules 1 are arranged upside down.

4 is a smoothing capacitor, 7 in FIG. 5 is a positive power supply bar, 8 is a negative power supply bar, 9 is an output bar, and 10 to 13 are drive wiring, respectively.

[Problem to be solved by the invention]

However, in this case, the positive power bar 7, the negative power bar 8, the output bar 9 and the drive wiring 1
Since the values approach 0.11, there is a problem that electromagnetic induction from the power busbars 7 to 9 causes oscillation or malfunction.

Therefore, an object of the present invention is to reduce the inductance from the DC power source while making it difficult to receive electromagnetic induction from the power bus bar, so that the power transistor can operate safely.

[Means to solve the problem]

In an inverter device in which upper and lower arms are each constructed of transistor modules having a power emitter terminal, a power collector terminal, and a drive terminal, and the positive power bar, negative power bar, and output bar of each of the upper and lower arms are arranged close to each other, A transistor module has a drive terminal located on one side, a power collector terminal, and a power emitter terminal in that order, and a transistor module with the same rating and electrical characteristics as the drive terminal, a power emitter terminal, and a power Each upper and lower arm is configured with transistor modules arranged in the order of collector terminals, and the drive terminals of each transistor module are arranged on the same side, and the Forming a positive power bar, a negative power bar and an output bar.

[Effect]

A transistor module in which a power collector terminal and a power exhaust terminal are arranged in this order with respect to a drive terminal located on one side of the module, and a transistor module in which a power emitter terminal and a power collector terminal are arranged in that order in relation to a drive terminal. By configuring the upper and lower arms with the upper and lower arms, arranging the drive terminals of each transistor module on the same side, and forming the power busbar on the opposite side from the drive terminal side, the power busbar is connected to the power busbar. To make it difficult to receive electromagnetic induction so that a power transistor can operate safely.

〔Example〕

FIG. 1 shows an outline of a power transistor module used in the present invention. That is, the one shown in Figure (A) is the same as the conventional one, but the one shown in Figure (B) is IA
The arrangement of power collector terminal 2 and power emitter terminal 3 is reversed from that shown in FIG. For this reason, for example, as shown in Fig. 2, the module IA is for the upper arm,
If the module 1 is used for the lower arm and the respective drive terminals 4 and 5 are arranged on the same side,
The drive terminal 4.5 can be arranged on the side far from the power bus bar side consisting of the positive power bar 7, the negative power bar 8, and the output bar 9. That is, it becomes possible to pull out all the drive wirings 10-13 from the same side. Although the module 1 is used for the lower arm and the module IA is used for the upper arm here, this relationship can be reversed by changing the connection mode to the power bus bar. Also, the positive power bar 7
, the negative power supply bar 8 and the output bar 9 are wired close to each other, as in the conventional case.

〔Effect of the invention〕

According to this invention, since the power collector terminal and the power emitter terminal of the power transistor module are reversed for the upper arm and the lower arm, the drive wiring can be moved away from the power busbar. This provides the advantage that oscillations and malfunctions due to electric M1 induction can be easily prevented.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing a power transistor module used in the present invention, Fig. 2 is a configuration diagram showing an example of an inverter configuration according to the invention, Fig. 3 is a schematic diagram showing a conventional example of a transistor module, and Fig. 4 is a schematic diagram showing a conventional example of a transistor module. FIG. 5 is a circuit diagram showing a general example of an inverter circuit. FIG. 5 is a configuration diagram showing an example of a conventional inverter configuration. Code explanation 1, IA...power transistor module, 2...
・Power collector terminal, 3...Power collector terminal,
4...Base terminal for drive, 5...Emitter terminal for drive, 6...Smoothing capacitor, 7...Plus power bar, 8...Minus power bar, 9...Output bar 10~ 13...Drive wiring.

Claims (1)

[Scope of Claims] 1) The upper and lower arms are each constituted by a transistor module having a power emitter terminal, a power collector terminal, and a drive terminal, and the positive power bar, negative power bar, and output bar of each of the upper and lower arms are close to each other. In an inverter device arranged in such a way that the drive terminal is located on one side of the module, the transistor module has a power collector terminal and then a power emitter terminal arranged in that order, and a drive terminal that has the same rating and electrical characteristics as the transistor module. Each upper and lower arm is composed of transistor modules arranged in the order of power emitter terminal and power collector terminal, respectively, and the drive terminals of each transistor module are arranged on the same side, and An inverter device characterized in that the positive power bar, negative power bar, and output bar are formed on a side opposite to a terminal side.