Performance evaluations on soft-switching boost power converter with a single auxiliary passive resonant snubber

This paper presents boost and buck and buck-boost circuit topologies of high-frequency soft switching transition PWM chopper type DC-DC high power converters with a single auxiliary passive resonant snubber. In the proposed boost power converter circuits operating under the principle of ZCS turn-on and ZVS turn-off commutation schemes, the capacitor and inductor in the auxiliary passive resonant circuit works as lossless snubber which is more effective to reduce the DC load side power recovery feedback-based switching losses of active power switch for high frequency switching and control. In addition to this, the switching voltage and current peak stress as well as EMI and RFI noises can be basically reduced by this single passive resonant snubber. Moreover, it is proved that converter topologies with a passive resonant snubber are capable of solving some problems of conventional hard switching PWM processing based on high-frequency pulse modulation principle of operation, the simulation results of this converter are discussed as compared with the experimental ones.