JPH03164072A - Transistor module for inverter - Google Patents

Abstract

PURPOSE:To reduce reactance component in a DC line positively by arranging P side and N side modules while oppositing each other with the terminal parts of collector and emitter being arranged at the inside, insulation laminating P and N poles, and enabling isolation of AC side through a power collector. CONSTITUTION:P side transistor 1 in a P side module and N side transistor 2 in an N side module are arranged while opposing each other with the terminal parts thereof being arranged at the inside. Collector terminal of the P side transistor 1 and emitter terminal of the N side transistor 2 are brought as close as possible, and P side copper bars 4 and N side copper bars 5 to be connected with those terminals are juxtaposed with approximately constant length. Insulation boards 7 are arranged over the entire length of the bars 4, 5 and laminated in place. Emitter terminal of the P side transistor 1 and collector terminal of the N side transistor 2 are arranged to be isolated through a power connector 8. By such arrangement, jumping of collector-emitter voltage of transistor is prevented and snubber can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transistor module that prevents an inverter.

[Conventional technology]

The mounting diagrams of the transistor modules for one phase of the inverter unit are shown in Figures 4 and 5, and the layout diagram is shown in Figure 6. In the figures, 1 is the P-side transistor, 2 is the N-side transistor, 4 is the P-side transistor, Side copper bar 5 is a side copper bar, and 6 is an AC side copper bar. In addition, 4゛ is the P side terminal, 51 is the N side terminal, and 6'
The AC side end A3 shows the cooling fins.

In the active transistor module, it is necessary to reduce the DC line actance in order to reduce the jump in collector-emitter voltage between the P-side transistor 1 and the N-side transistor 2. 11 copper bars 5 are insulated by an insulating plate 7 and laminated.

[Problem to be solved by the invention]

However, in the conventional transistor module shown in FIG. 4 and FIG. When stacking with the N-side copper bar 5, there will be a portion where it is impossible to stack P and N.

An object of the present invention is to eliminate the disadvantages of the conventional example, and to provide P{! To provide a transistor module for an inverter, in which an IJI bar and an N-side copper bar can be insulated and laminated to almost the same length, and as a result, the actance of a DC line can be surely reduced.

[Means for Solving the Problems] In order to achieve the above object, the present invention arranges a P-side module and an N-side module facing each other with the terminal portions of the collector and emitter inside, and connects the P and N poles. The main idea is that the electrodes are insulated and laminated, and the AC side can be separated using a power connector.

[Effect]

According to the present invention, since the P-side module and the N-side module are arranged facing each other with the collector and emitter terminal portions inside, the collector terminal of the P-side transistor and the emitter terminal of the N-side transistor can be placed as close as possible. Since the P-side copper bar and the N-side copper bar connected to these terminals need only have approximately the same length, they can be laminated to insulate each other over their entire length.

In addition, the AC side can be separated with a power connector, so
By separating the emitter terminal of the P-side transistor and the collector terminal of the N-side transistor, only the P-side transistor portion can be removed during maintenance or the like.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a side view showing the mounting state of the inverter transistor module of the present invention, and Fig. 2 is A-A of Fig. 1.
The line sectional view and FIG. 3 are wiring diagrams, and the same components as in FIGS. 4 to 6 showing the conventional example are given the same reference numerals.

That is, in the figure, 1 is a P-side transistor, 2 is an N-side transistor, 4 is a P-side copper bar, and 5 is an N-side copper bar 6 is an AC{jl
! I copper bar, 4l is P side terminal, 51 is N side terminal,
61 is an AC side terminal, 3 is a cooling fin, and the module of the present invention has a P-side transistor 1 and an N-side transistor of a P-side module.
The N-side transistor 2 of the side module is arranged to face the N-side transistor 2 of the side module with the terminal portion facing inside. As a result, the collector terminal of the P-side transistor 1 and the terminal terminal of the N-side transistor 2 are brought as close as possible to each other, and the P-side transistor connected to these terminals is
O! ! ! The copper bar 4 and the N-side copper bar 5 are arranged in parallel with approximately the same length. Therefore, an insulating plate 7 was placed between the entire length of these bars 4 and 5, and they were laminated.

Furthermore, the emitter terminal of the P-side transistor l and the collector terminal of the N-side transistor 2 will also become close to each other.
A power connector 8 was disposed on the AC side connecting these terminals, and was designed to be separable.

The cooling fins 3 are provided separately for each of the P-side transistors 1 and the N-side transistors 2, and are arranged on the outside.

In this way, it is difficult to access the inside during assembly or maintenance, so by disconnecting the pin terminal of the P-side transistor 1 and the collector terminal of the N-side transistor 2 via the power connector 8, The work can be done easily by fitting the P-side transistor l part later or removing it first.

[Effects of the Invention] As described above, in the inverter transistor module of the present invention, the collector and emitter terminals are arranged facing each other with the terminals inside, so that the collector terminal of the P-side transistor of the P-side module and the N-side transistor of the N-side module are connected to each other. The emitter terminals of the side transistors can be placed as close as possible, and as a result, the P side copper bar forming the DC line and the N! ! Since the J copper bar can be laminated with almost the same length as the insulation layer, the direct current line actance can be reliably reduced, the transistor collector voltage can be prevented from jumping, and snares can be omitted. be.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the mounting state of the inverter transistor module of the present invention, and Fig. 2 is an A-A of Fig. 1.
3 is a wiring diagram of the same as above, FIG. 4 is a front view showing a mounting state of a conventional example, FIG. 5 is a side view of the same, and FIG. 6 is a wiring diagram of same as above. l...P side transistor 2...N side transistor 3...Cooling fin 4゜...P side terminal 5''...N side terminal 6゜...AC side terminal 8...For power connector

Claims (1)

[Claims] The P-side module and the N-side module are arranged facing each other with the collector and emitter terminals inside, the P and N poles are insulated and laminated, and the AC side can be separated using a power connector. Characteristics of transistor modules for inverters.