Reverse conducting module

Abstract

A reverse conducting module comprises a shell, a shell upper cover, a shell bottom plate and a plurality of reverse conducting assemblies. Each reverse conducting assembly comprises a tube core, eachtube core is formed by antiparallel packaging of a thyristor and a rapid rectifier tube, each reverse conducting assembly further comprises a cathode electrode column located above the corresponding tube core, the upper end of each cathode electrode column penetrates out of the shell upper cover, an insulating sleeve sleeves the cathode electrode column, the lower end of the cathode electrode column and the lower end of the insulating sleeve are provided with a first flange and a second flange respectively, a disc spring sleeves the insulating sleeve, a pressing plate is arranged at the upperend of the disc spring, and the pressing plate is fixedly connected with a bottom plate of the shell through a first screw. And a tube core pressing block is arranged between the upper part of the tube core and the lower end of the cathode electrode column, a common polar plate is arranged at the lower part of the tube core, and a ceramic gasket is arranged between the common polar plate and the bottom plate of the shell. The reverse conducting module can replace a reverse conducting thyristor (RCT), and the cost of a direct-current chopper device and various inverters is greatly reduced.

Description

technical field [0001] The invention relates to the field of inverter circuit design, in particular to an inverter module. Background technique [0002] Reverse conducting thyristor RCT (Reverse-Conducting Thyristir) is also known as reverse conducting thyristor. Its characteristic is that a diode is connected in reverse parallel between the anode and the cathode of the thyristor, so that the emitter junctions of the anode and the cathode are both short-circuited. Due to this special circuit structure, it has excellent performances such as high voltage resistance, high temperature resistance, short turn-off time, and low on-state voltage. For example, the turn-off time of the reverse-conducting thyristor is only a few microseconds, and the operating frequency is tens of kilohertz, which is better than that of the fast thyristor (FSCR). This device is suitable for switching power supply and UPS uninterruptible power supply. One RCT can replace one thyristor and one freewhee...

AI Technical Summary

Problems solved by technology

S3900MF is not suitable for high-power DC chopper devices and various inverter circuits due to its packaging structure limitation, small on-state average current, and poor heat dissipation capability.

There are products and devices similar to the reverse-conducting thyristor RCT in foreign countries, but there is a lack of similar devices in China, and the capital investment for developing the same type of devices is very large, and the investment cycle is long. The market urgently needs products to replace this device.

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