DC-DC Converters for Two-Quadrant Operation with Controlled Output Voltage

Abstract

A DC-DC converter is proposed with new modulation schemes for a voltage-controlled output. The DC-DC converter is designed for a reversible current in order to feed DC current motors or four quadrant converters, which need a galvanic separation from a DC source. The output voltage is stabilized while the load current can change rapidly. The new modulation method reduces the losses by 50%. Experimental tests have been made on a 20kW prototype.