Ultrafast recovery switch module

Abstract

The invention relates to an ultrafast recovery switch module which comprises a three-phase bridge rectification switching circuit, wherein the three-phase bridge rectification switching circuit is formed by serially connecting a three-phase bridge rectification circuit with a thyristor chip, the three-phase bridge rectification circuit is formed by connecting six ultrafast recovery diode chips, and the thyristor chips are connected in series with the anode output end of the bridge rectification circuit; all the elements in the three-phase bridge rectification switching circuit are connected in a bonding mode by aluminium wire leads, and the three-phase bridge rectification switching circuit is packaged between a plastic shell and a red copper soleplate through an elastic silica gel layer and an epoxy resin layer. The ultrafast recovery switch module not only can be adapted to great current impact when started, but also has wide applicable power range without employment of a mechanical switch, is more beneficial to the miniaturization of a rectification module, further lowers the manufacturing cost, and also has the characteristics of low noise, less electromagnetic pollution and long service life.

Description

【Technical field】 [0001] The invention belongs to the field of power semiconductor devices, and relates to the combination and connection of an ultra-fast recovery diode chip and a thyristor chip, and a packaging technology for semiconductor devices. 【Background technique】 [0002] At present, during the actual use of the three-phase rectifier bridge, the inrush current at the moment of startup is too large, which can easily cause damage to the rectifier device itself or the filter capacitor. To this end, people usually use the following three solutions to overcome: [0003] The first solution is to connect a resistor with a negative temperature coefficient in series at the output end of the rectifier bridge, such as figure 1 As shown, this scheme is only suitable for low-power places. [0004] The second solution is to connect a start-up resistor in series with the output end of the rectifier bridge to reduce the start-up current. figure 2 shown. The disadvantage of th...

AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that the switch is easily damaged due to frequent actions, the overall reliability is not high, and the rectifier module is large in size, so it cannot be used in many places with limited space, and it does not meet the development requirements of electronic control miniaturization.

[0005] The third scheme is a half-controlled bridge power supply scheme composed of three diodes and three thyristor chips, such as image 3 As shown, the technology of this solution is more complicated, and it needs to use three thyristor chips, the cost is high, and it is difficult for users to accept

[0006] In the above three schemes, because ordinary diodes are used, not only the noise is relatively large in the working process, but also there is serious electromagnetic interference. Pollution

Images