| Abstract |
Solid-State Power Controller (SSPC) is a key device in the advanced aircraft power distribution system. It replaces the traditional electromechanical circuit breakers, contactors and relays to switch loads on/off and provides comprehensive protection functions. The large surge current, which results from the starting of large capacitive loads, is similar to the short-circuit fault, so it may mislead to the false protection and on the other hand, destroy the solid-state switch MOSFET. This paper proposes a control strategy for DC-SSPC, which can not only limit spikes but also distinguish short-circuit fault from capacitive loads quickly. Simulations and experiments proves that the control strategy is feasible. And compared with the fixed time delay fault detection strategy, the newly proposed control strategy can decrease the distinguish time, increase the capacity of switching on large capacitive loads. |
