A Single-Stage Dual-Active-Bridge AC-DC Converter with Wide-Range ZVS

This paper proposed a single-stage dual-active-bridge AC-DC converter with wide-range zero-voltage switching (ZVS). By optimizing the ZVS realization conditions, wide-range zero-voltage switching characteristic is achieved on both the primary and secondary sides. This converter adopts a single-stage structure, which not only reduces the system cost and improves the working efficiency but also realizes the natural power factor correction and electrical isolation functions. Through theoretical analysis, parameter design and simulation experiments, the feasibility of the converter within the desired operating range was verified, and the ZVS condition of the power device was successfully achieved.