Feedforward Control Strategy of Dual Active Bridge Series Resonant Converter Based on Optimized Phase Shift
Fan Enze1,2, Li Yaohua1,2, Ge Qiongxuan1, Zhao Lu1
1. Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China; 2. University of Chinese Academy of Sciences Beijing 100049 China
Abstract The dual-active-bridge series resonant converter (DBSRC) in traditional single-phase- shift modulation under no-unit voltage gain has high backflow power, resulting in high RMS of the resonant current. For this problem, the DBSRC’s characteristics of the transmission power and the resonant current in multi-phase-shift modulation are analyzed. The multi-phase-shift modulation strategy is derived based on the optimization of the resonant current using the Lagrangian function. It is indicated that the optimized-phase-shift modulation can reduce the magnitude of the resonant current in light and medium loads. Based on optimized-phase-shift modulation method, a voltage closed-loop control strategy with output power feedforward is delivered. Finally, simulation and experimental results verify the feasibility and effectiveness of the optimized modulation and the feedforward control strategy.
Fan Enze,Li Yaohua,Ge Qiongxuan等. Feedforward Control Strategy of Dual Active Bridge Series Resonant Converter Based on Optimized Phase Shift[J]. Transactions of China Electrotechnical Society, 2022, 37(20): 5324-5333.
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2022, Vol. 37 
