Fault-current control in power-conditioning units using power transistors

A modified arrangement of the classic form of inverter `leg?? is introduced which automatically limits the rate of rise of current in the event of circuit faults. In particular, it operates when two devices in the same leg are on simultaneously, and if the output terminals are short-circuited. Experimental results for simulated fault conditions show that fault currents are limited in a predictable manner, and that the circuit behaves normally in other respects.