JPH0452995Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a transistor module with a base drive function in which the transistor module is driven by a base drive unit.

[Prior art]

A conventional transistor module is shown in FIG. In the figure, 1 is the collector terminal of the molded transistor module, 2 is the emitter terminal, 3 is the base terminal connected to the base drive unit (not shown), and 4 is also connected to the base drive unit (not shown). emitter terminal, 5 is the cooling plate of the transistor module, 6
Reference numeral 7 indicates a molded resin forming the transistor module, and 7 indicates mounting holes drilled in mounting seats integrally molded on both sides of the mode resin 6. FIG. 2 shows the internal circuit of the transistor module.

A conventional molded transistor module has a structure as shown in Fig. 1, and a base signal for driving is transmitted from a base drive unit (not shown) to a base terminal 3 and an emitter terminal shown in Fig. 1 through a connection line A. 4 is supplied.

Note that the collector terminal 1 and emitter terminal 2 shown in FIG. 1, which are the main circuit terminals of the transistor module,
The main circuit potential applied to the base drive unit is also applied to the base terminal 3 and emitter terminal 4, and insulation from the control circuit potential is performed inside the base drive unit.

Conventional transistor modules are configured as described above, so if the connection line connecting the base drive unit and transistor module is long, the rise time of the base signal will be delayed due to the reactance of the connection line. However, there were drawbacks such as being affected by noise in the connecting wires.

[Summary of the idea]

This idea was made to eliminate the drawbacks of the conventional ones as described above, and by creating a structure in which the base terminal and emitter terminal of the transistor module are directly connected to the base terminal and emitter terminal of the base drive unit, the connection line can be reduced. A transistor module with a base drive function that eliminates the need for base signal rise time delays and the effects of noise on the connection line, and also allows smooth connection of both terminals and eliminates terminal damage during connection. is intended to provide.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In FIG. 3, the same parts as in FIGS. 1 and 2 are designated by the same reference numerals. In FIG. Terminals, 3a are base terminal contact pins provided in the molded resin 6 forming the transistor module M, 4a are the molded resin 6
The contact pins 3a and 4a for the emitter terminals provided in the contact pins 3a and 4a have a height h. Reference numeral 8 designates threaded rods for mounting the base drive unit with a height H, which are also implanted in the four corners of the molded resin 6, and the height H of this threaded rod 8 is the same as the contact pin 3a for the base terminal and the contact pin for the emitter terminal. It is formed higher than 4a.

9 is a molded resin forming the base drive unit U, 10 is a contact socket for a base terminal provided in this molded resin 9, 11 is a contact socket for an emitter terminal provided in the molded resin 9, 12, 13 14, 15 are control signal terminals provided on the molded resin 9; 14, 15 are control power supply terminals provided on the molded resin 9; 16, 17,
Numeral 18 is a washer, spring washer, and nut for fixing the base drive unit U to the transistor module M. Numeral 23 is a through hole through which a threaded rod 8 for attaching the base drive unit passes, which is bored at the four corners of the molded resin 9. ing.

FIG. 4 shows the internal circuits of the transistor module M and the base drive unit U, in which 19 is an insulating part that insulates the control power source and the main circuit potential, 20 is an insulating part that insulates the control signal and the main circuit potential, and 21 2 is a power supply forming section, and 22 is a base signal forming section.

According to the above configuration, when assembling the base drive unit U and the transistor module M, first,
By inserting the base drive unit mounting threaded rod 8 into the through hole 23 of the molded resin 9 and screwing the nut 18 through the washer 16 and spring washer 17, the base drive unit U is mounted and fixed on the transistor module M. The state will be as follows.

On the other hand, in the process of inserting H-h into the through hole 23 of the threaded rod 8, the assembly position of the transistor module M and the base drive unit U is automatically and accurately performed, and the contact socket 10 for the base terminal and the emitter The base terminal contact pin 3a and the emitter terminal contact pin 4a on the transistor module side are smoothly and automatically inserted into the terminal contact socket 11 without applying excessive force. As a result, the contact pins 3a and 4a are not damaged during assembly, and the base signal, which is the output signal of the base drive unit U, is directly connected to the transistor module M inserted into the contact sockets 10 and 11. It is supplied to the transistor through the base terminal contact pin 3a and the emitter terminal contact pin 4a.

Therefore, if the molded transistor module M shown in FIG. 3 is used, there is no need for the conventional connection line A that connects the base drive unit U and the base terminal 3 and emitter terminal 4 of the transistor module M. Become. Also, transistor module M
Since the base drive unit U is placed and fixed on top,
The mounting space for the base drive unit U is no longer required in a plan view, and it becomes possible to downsize the device using the transistor module.

[Effect of idea]

As described above, according to this invention, the transistor module is provided with a base terminal contact pin and an emitter terminal contact pin through which base signals are exchanged, and the base drive unit is provided with a base terminal contact socket and an emitter terminal contact socket. Since a socket is provided and the contact pins and contact socket are directly fitted and connected, there is no need for a connection line to connect the transistor module and the base drive unit, and the rise time of the base signal is reduced by using the connection line. All effects such as delay and noise on the connection line are eliminated. Further, even if the base terminal of the transistor module is short-circuited, there is no risk of destroying the built-in elements due to the influence of static electricity, so the contact pin for the base terminal can be a convex terminal.

As a result, during the manufacturing process of the transistor module, the connection wire of the base drive unit for testing can be connected to the contact pin for the base terminal and the contact pin for the emitter terminal of the transistor module. You can easily perform the test without any need. Therefore, the connection line between the transistor module and the base drive unit is removed, the rise time of the base signal is delayed by the reactance of the connection line, and the influence of noise on the connection line is eliminated. Since the base drive unit is mounted and fixed on the transistor module, effects such as a reduction in the planar area occupied can be obtained.

Moreover, since we have provided a contact pin that is lower than the threaded rod for mounting the transistor module, when installing the base drive unit to the transistor module, the threaded rod first penetrates the through hole of the base drive unit to determine the assembly position. After that, the contact pin is inserted into the contact socket, and the ends of the contact pin and contact socket do not come into contact with each other and are damaged, and the insertion and connection between the two can be carried out smoothly.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional molded transistor module, Fig. 2 is a circuit diagram of Fig. 1, and Fig. 3 is an exploded perspective view showing an embodiment of a transistor module with a base drive function according to the invention. , FIG. 4 is a circuit diagram of FIG. 3. 1... Collector terminal, 2... Emitter terminal, 3
a...Contact pin for base terminal, 4a...Contact pin for emitter terminal, 5...Cooling plate, 6
...Mold resin, 7...Mounting hole, 8...Threaded rod, 9...Mold resin, 10...Contact socket for base terminal, 11...Contact socket for emitter terminal, 12, 13...Control signal terminal, 14, 15... terminal for control power supply, 16... washer, 17... spring washer, 18... nut, 19...
...Power insulating section, 20... Signal insulating section, 21... Power supply forming section, 22... Signal forming section. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A base drive unit that has a base signal forming section that forms a base signal, is provided with a contact socket for a base terminal and a contact socket for an emitter terminal that outputs the base signal, and has through holes drilled at four corners. By placing this base drive unit, a threaded rod for mounting the base drive unit that passes through the through hole, a contact socket for the base terminal, and a contact socket for the emitter terminal, which are lower than the threaded rod, are installed separately. A transistor module with a base drive function, comprising a transistor module provided with a base terminal contact pin and an emitter terminal contact pin which are inserted and connected to transmit and receive the base signal.