SOFT-SWITCHED PWM CONVERTER WITH INDUCTIVE DC FILTER

This paper presents a soft-switched ac/dc converter structure, useful for current-fed inverters and forced-commutated PWM rectifiers with in ductive load, Typical applications are high-power ac motor drives, mag net power supplies and active power filters with inductive energy stor age. As compared to hard-switched converters, the proposed solution ra ils for some increase of the circuit complexity, but provides improved input and output performances due to the higher switching frequency. Further improvements are ensured by proper control of the commutation process.Actual converter capabilities are demonstrated by experimental results.