72V DC bus output full-bridge converter in solar power system for micro EV

A home solar power system for micro electric vehicles (EVs) is one of the important technologies to realize a sustainable energy society. The aim of this paper is a demonstration of a high performance digital control phase-shifted full-bridge converter connected between solar panels and the dc-bus line. Since the voltage in a home storage battery and EV battery is around 72V in some products, the output voltage of prototype is regulated from 70V to 84V. The output power of prototype is 8kW conforming with a general power amount of home solar power generation. As a result, the prototype achieves up to 94% power efficiency. Moreover, the output voltage fluctuation is less than 1% when a load step change is from 0A to 100A.