A new configuration of bi-directional isolated DC/DC converter using dual half-controlled bridge with pulse current link concept

This paper proposes a new circuit topology for galvanic isolated DC/DC conversion. The proposed circuit mainly consists of two half-controlled bridges connected by a transformer. One half-controlled bridge consists of two diodes and two switches and a snubber capacitor. With additional clamp switches, the number of switches is low compared to conventional converter. The current flowing in the transformer is a unidirectional pulse waveform. Soft-switching can be achieved in wide operating range, even when input and/or output voltages are changed. This paper describes control and design principles to achieve soft-switching in whole operating range. The first experimental results including brief loss analysis are reported.