Design and Implementation of High Voltage Solid State Switching High Frequency-Low Noise Nanosecond Pulse Power Supply Module with High Reliable Switching Characteristics

It is a simple and reliable scheme to use the switching characteristic of high-voltage solid-state switch to generate controllable high-voltage pulse power. Compared with the traditional gas switch, the current solid-state switch can be fully controlled in the switching state, and the switching frequency is greatly increased, gradually replacing the traditional gas switch. However, the circuit structure of the cascade solid-state switch is complex, the reliability is low, and the switching characteristics of the switch are still not ideal. In order to solve this problem, based on the SiC-JEFT cascaded solid-state switch structure, by considering the difference of the reverse avalanche breakdown voltage and the superposition of the reverse breakdown current at different positions for different voltage equalizers, the high reliability switching characteristics of the proposed solid-state switch can be realized only by optimizing the parameters of the single avalanche breakdown resistance value, and the design of the 6kV solid-state switching mode high frequency-low noise nanosecond pulse power supply module is realized. The experimental results show that the SiC-JFET cascaded solid-state switch has the characteristics of fast switching speed and low switching loss, the pulse power supply has the characteristics of simple circuit structure, high repetition frequency and low noise.