A High Step-up Current-Fed Phase-Shift Full Bridge DC-DC Converter with a New Switching Strategy

High step-up current-fed DC-DC converters arewidely used in many applications. In this paper a new high stepupcurrent-fed DC-DC converter is proposed based on full-bridgeconverter. A new switching strategy is used to achieve high voltagegain. Also the converter used a new voltage multiplier whichincreases voltage gain, in turns. The operation modes of proposedtopology are discussed in section II based on new switchingstrategy, voltage gain is presented in section III. Soft switchingconditions are discussed in section IV. Finally the simulationresults is presented in section V to validate the characteristics ofthe proposed converter.

Keywords:

Fuel cells , High step-up converters , phase shift , quasi-resonant converter , soft switching