PWM series resonant DC-link converter with current clamping by theuse of saturable core

摘要

A series resonant DC link power converter with pulsewidthnmodulation (PWM) capability and current peak limiting is proposed. Whenndesired, a resonant transition creates notches in the DC link current,nallowing the switches of the power converter to synchronize withnexternal PWM strategy. For that, it requires only an additionalnbidirectional switch. A saturable core (SC) achieves current peaknlimiting of which the clamping level is automatically adjusted by thencurrent load. Analysis and design procedure are presented for thenproposed topology, which does not use any dedicated devices for startup.nSimulated and experimental results corroborate the theoretical studies