Bidirectional Low-Voltage Solid-State Circuit Breaker Based on SiC MOSFET

Solid-state circuit breakers have been widely used at home and abroad because of their advantages such as extremely fast breaking speed, no arc, and long service life. However, at present, the application scenarios of solid-state circuit breakers are limited due to their high loss and large volume. Based on the 34mm commercial power semiconductor module, the parameter design method of a compact 270V/100A solid-state circuit breaker and the design of the energy-absorbing branch based on TVS are proposed in this paper. By building an equivalent experimental platform, a 100A load current breaking experiment and a 200A fault current blocking experiment are carried out. Experimental results show that the solid-state circuit breaker proposed in this paper can conduct 100A current for a long time and block 200A fault current in microseconds, proving its feasibility.