An Optimal Control Strategy for the DAB-based Partial Power Converter Based on Extended-Phase-Shift Control

Dual active bridge (DAB) converters are extensively used due to the advantages of wide voltage regulation range and easy realization soft switching. Besides, concept partial power (PPCs) has been widely applied increase converter efficiency by reducing actually processed converter. Therefore, in this paper, DAB PPC combined. And a high frequency DAB-based aiming at optimization is selected out analyzing comparing characteristics several connections. Considering PPC, extended-phase-shift-based control strategy zero-voltage switching (ZVS) current stress analyzed adopted paper. With trend for converters, non-ideal factors like output capacitors switches need be considered improve performance. The taken into consideration when ZVS performance magnetizing inductor utilized expand range. To verify correctness theoretical analysis, prototype using GaN devices with 1kW rated 500kHz built. experimental results consistent analysis.