Evaluation of Reconfigurable Isolated Bidirectional DC/DC Converters for an EV Charging system with Bipolar DC-link

In this paper, four 10 kW reconfigurable, isolated, and bidirectional DC/DC converter topologies, supplied by +750/0/-750V bipolar DC-link, are evaluated based on efficiency, loss distribution, thermal considerations, volt-ampere ratings of SiC MOSFETs, and transformer losses for an electric vehicle (EV) charging system. Taking into account the merits and demerits of the evaluation outcomes, the full-bridge based modular dual active bridge converter topology is shown to be the optimal choice for the considered EV charging system.