JPH0213549B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mounting arrangement of a thyristor module type converter unit, particularly a converter unit that uses a thyristor module to convert alternating current to direct current or direct current to alternating current. be.

[Prior art]

Conventionally, as a converter unit using a thyristor element, there has been a reversible Leonard circuit with three-phase AC input shown in FIG. In the figure, U, V, and W are connection terminals for the three-phase AC power supply, and TH11 to TH61 and TH12 to TH62 are thyristor elements that control the current in the forward and reverse directions, respectively, for the DC motor load DCM. The device unit 1 is configured. Ignition unit GP1 is a thyristor element
The ignition unit controls the ignition of TH11 to TH61.
GP2 controls firing of thyristor elements TH12 to TH62. P and N are DC output terminals of the converter unit 1.

FIG. 2 shows an example of individual mounting of the above-mentioned thyristor elements. In Figure 2, TH is a thyristor element with an anode terminal A, a cathode terminal, and a gate terminal G.
and is attached to the cooling fin F.

FIG. 3 shows an example in which a plurality of the above individual thyristor elements are used to construct a converter unit based on the three-phase AC input reversible Leonard circuit shown in FIG. In Figure 3, TH11 to TH61 and
TH12 to TH62 are individually connected to the anode terminal A,
A thyristor element having a cathode terminal K and a gate terminal G, L1 to L15 are close reading conductors, LB1, LB2
indicates a connection bar. U2, V2, W2 and P2,
N2 are external connection conductors on the AC side and DC side, respectively.

Conventional converter units are configured as described above, so there are a large number of wires to assemble within the converter unit, which takes time to assemble, and the cooling fins must be used with electrical insulation. Therefore, it had disadvantages such as a complicated structure and large external dimensions. Furthermore, since there are a large number of wires, there is a drawback that wiring errors are likely to occur.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it consists of a plurality of thyristor modules placed on the same cooling base, shifted by the pitch between the electrodes of the thyristor modules, and arranged in opposite directions in parallel. By arranging the converter unit, the number and types of wiring can be reduced, and a compact converter unit with a simple structure and easy to assemble is provided.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is an external view of the thyristor module used in this invention. In Fig. 4, 2 is a plastic molded case having a substantially rectangular shape;
TH1 and TH2 are housed in the molded case, and anode terminals A1, A2, and
cathode terminals K1, K2, and gate terminal G1,
The internal connections of the first thyristor element and the second thyristor element provided with G2 are as shown in FIG. 3 is a metal cooling fin that is a good thermal conductor, and is connected to the thyristor elements TH1 and TH2.
It is arranged at the bottom of the case 2 and is electrically insulated from the casing 2. Each of the above components 2, 3, TH
1 and TH2 constitute a thyristor module TM.

In the Thyristor ModuleTM, the anode electrode A1 of the first thyristor element TH1 and the second
The cathode electrode K2 of the thyristor element TH1 is
As shown in FIG. 5, it is connected in advance to the inside of the thyristor element or to the outer surface of the case 2. In addition, as shown in FIG. 4, pitches a1 and a between each electrode
2 and a3 are approximately equally spaced.

Each electrode A1, K1, A2, K2 has a structure in which it is screwed from the top to the top surface of the case 2 with a screw 4,
These electrodes are arranged in a straight line.

FIG. 6 shows one embodiment of the present invention.
The thyristor module shown in the figure is used to construct the three-phase AC input reversible converter unit shown in FIG.

In Fig. 6, TM1 to TM3, TM1A to
TM3A is thyristor module, TH11~
TH61, TH12 to TH62 indicate thyristor elements inside the thyristor module. F is a cooling fin, and the above six thyristor modules TM
1 to TM3 and TM1A to TM3A are attached together. U1, V1, and W1 are AC side connection conductor bars that connect the cathode electrodes of the second thyristor elements of adjacent thyristor modules. P1 and N1 are DC side connection conductor bars, and each of the above-mentioned thyristor modules TM1 to TM3 and TM1A
~Second thyristor element TH42 of TM3A,
TH62, TH22 (TH12, TH32, TH5
2) Anode electrode A2 and first thyristor element
TH11, TH31, TH51 (TH12, TH3
2. Connect the cathode electrodes K1 of TH52) in sequence. These conductor bars are made of a good electrical conductor such as copper or aluminum, and are screwed to each electrode as shown. The converter unit 1 is formed by each of the above components.

U2, V2, W2 indicated by broken lines are a pair of thyristor modules TM1, TM1A, connected by the AC side connection conductor bars U1, V1, W1, respectively.
Among (TM2, TM2A, TM3, TM3A),
The AC side external connection conductors P2, N2 connected to the anode electrode of the first thyristor element TH11 (TH31, TH51) of one thyristor module are the DC side connection conductors, and the DC side external connection conductors connected to the bars P1, N1. It is.

Here, paying attention to the thyristor modules TM1 and TM1A connected to the AC side U phase, the thyristor module TM1A is arranged in opposite directions in parallel to the thyristor module TM1, and the thyristor module TM1A is arranged in parallel with the thyristor module TM1, They are arranged so as to be shifted by one pitch a1 corresponding to the interval length.

Thyristor module connected to AC side V phase
TM2, TM2A, TM also connected to W phase
3. TM3A also has the same configuration and arrangement as TM1 and TM1A.

Since the converter unit 1 of the present invention is constructed as described above, the number of wires in the unit is 3 on the AC side.
A total of 5 pieces of 2 types, 2 types, one on the main side and two on the DC side, are sufficient.

In the above embodiment, a reversible converter unit with a three-phase AC input has been described, but a reversible converter unit with a single-phase or polyphase AC input other than three-phase may also be used.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of thyristor modules are arranged on the same cooling fin in parallel and shifted by the electrode spacing pitch, so that the internal connection conductor when configuring a reversible converter unit is The number is greatly reduced compared to conventional reversible converter units, making the unit extremely simple to assemble. Furthermore, the reduction in the number of connected conductors eliminates wiring errors and improves quality. Furthermore, the entire unit becomes more compact and maintenance becomes easier.

[Brief explanation of drawings]

Figure 1 is a circuit connection diagram of a conventional 3-phase AC input reversible converter unit, Figure 2 is an external perspective view of a conventional thyristor element, Figure 3 is a configuration diagram of a conventional 3-phase reversible converter unit, FIG. 4 is an external perspective view of a thyristor module used in the present invention, FIG. 5 is an internal connection diagram thereof, and FIG. 6 is a configuration diagram of a three-phase AC input reversible converter unit according to the present invention. TH...Thyristor element, TM...Thyristor module, L1 to L15, LB1 to LB2, U
1, V1, W1, P1, P2... Connection conductor, 1...
...Converter unit, 2...Plastic mold case, 3...Metal cooling fin, 4...Screw.
Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A first thyristor element and a second thyristor element are housed in a plastic molded case, and the anode and cathode electrodes of the first thyristor element and the anode and cathode electrodes of the second thyristor element are sequentially bonded to the plastic molded case. a thyristor module arranged in a straight line on the upper surface of the molded case so that the distance between the electrodes is approximately equal, and connecting the anode electrode of the first thyristor element and the cathode electrode of the second thyristor element; and a cooling fin in which a plurality of the thyristor modules are successively arranged side by side in an opposite direction with the second thyristor module being shifted relative to the first thyristor module by the distance between the electrodes; a DC side connection conductor bar that sequentially connects the anode electrode of the second thyristor element of each thyristor module and the cathode electrode of the first thyristor;
an AC side connection conductor bar connecting the cathode electrodes of the thyristor elements, a DC side external connection conductor connected to the DC side connection conductor bar, and first and second thyristors connected by the AC side connection conductor bar. A modular converter unit comprising an AC side external connection conductor connected to an anode electrode of a first thyristor element of one thyristor module among the modules.