A Dual Active Bridge Converter with Full ZVS Range Using a Buck-Boost Converter

One of the bidirectional converters is the dual active bridge (DAB) structure, which has zero voltage switching (ZVS) capability. However, its ZVS range is limited. Improving the performance of a DAB structure has been studied by researchers. In this paper, using the buck-boost topology, the voltage matching between two sides of the transformer is obtained, and ZVS for a DAB converter in the full range of output power is achieved. In the proposed structure, the single-phase-shift (SPS) switching strategy is used, which is a simple method of a DAB topology. The analysis of the proposed topology is given. To verify the steady-state analysis, this topology is simulated, and simulation results show the correct converter operation.