Partial Series LC Resonance-Pulse Assisted Zero Current Switching Current-Fed Push-Pull Converter

Resonance pulse commutated series LC current-fed push-pull converter has been analyzed and designed. Proposed converter maintains zero current switching (ZCS) of the semiconductor devices for wide source voltage and load disturbances eliminating turn-off voltage spike. It utilizes series resonance characteristics during switching overlap to cause naturally commutation. Variable frequency control has been implemented to maintain constant output voltage and ZCS under varying operating conditions. Push-pull structure has been employed that has only two power devices with common ground with source requiring simple gate drive. Simulation results are presented to evaluate and validate the performance of the converter.