Electrical discharge power supply circuit

摘要

An electrical discharge machining power supply circuit for machining a workpiece, including: a power supply circuit (1); a first circuit including a first switching device (6) and a first rectifying device (8); a second circuit including a second switching device (7) and a second rectifying device (9); an electrical discharge machining electrode (4) for providing an electrical discharge to the workpiece (5); and a first circuit device (12) for preventing an excessive current generated by wiring inductance (10, 11) in the circuit from damaging at least the first switching device (6). <IMAGE>