M. Kim, D. Yang and S. Choi, "A Fully Soft-Switched Multiphase DC-DC Converter with Reduced Switch Count for High Power Application", IEEE International Power Electronics Conference.
Abstract : this paper proposes a fully soft-switched
multiphase dc-de converter for high power application. The
proposed multiphase converter exhibits low switch count
and simple gate driver circuit. Owing to use of low rated
lossless passive clamp and series resonant circuits, ZCS
turn-on and ZVS turn-off of switches and ZCS turn-off of
diodes are achieved. Further, despite the passive clamp
method, operating duty cycle range is not limited, resulting
in no additional start-up circuitry required. Experimental
results on a 50kHz, 5kW prototype are provided to validate
the proposed converter.
Keywords : Soft switching, high power dc-dc converter,
muitiphase, lossless snubber