Snubber circuit of power converter.

摘要

A power converter is disclosed comprising two power transistors (31,32) connected in series across a d.c. power supply (1). A freewheeling diode (41,42) is connected in antiparallel across the emitter-collector path of each power transistor. Further a charge and discharge type snubber circuit is connected in parallel with each power transistor, each snubber circuit comprising a snubber capacitor (61,62) and a voltage-regulator diode (51,52). Finally a clamping snubber circuit comprising a snubber capacitor (71) and one or both of said voltage-regulator diodes is connected across said power supply.