Switching power supply system and process

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

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H02M 3335

Patent

active

058479414

ABSTRACT:
A switching power supply system comprises a semiconductor switching device for selectively opening and closing a current path from a dc power source to a load, an inductive component connected in series with the switching device, a series combination of a first diode and a voltage clamp, and a control circuit for controlling the switching device. The series combination is connected in parallel to the switching device or the inductive component such as a transformer or an inductor. The first diode has a carrier lifetime equal to or longer than the switching period of the switching device. A discharge circuit is connected between one terminal of the dc power source and a branch point between the first diode and the voltage clamp, and arranged to regulate an amount of energy returned from the voltage clamp to the dc power source.

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