Abstract：In order to reduce the power losses of the dual active bridge(DAB) DC-DC converter,an optimal control strategy combining dual-phase-shift and traditional-phase-shift controls is proposed.It can minimize the root-mean-square(RMS) current flowing through the leakage inductor while ensuring zero-voltage-switching(ZVS) operation of all power switches.In this paper,the power transmission characteristics and soft-switching range under traditional phase-shift control and dual phase-shift control are first analyzed respectively.On this basis,by establishing the mathematical models of the RMS current,transmission power,and soft switching conditions,an optimal control trajectory is derived,which enables the DAB converter to operate in the minimum-RMS-current state while guaranteeing ZVS operation of all power switches.Thus,both the conduction and switching losses can be significantly reduced,and the optimal control of DAB is achieved.Finally,experimental results are provided to validate the correctness of theoretical analysis and feasibility of the control strategy.
吴俊娟,孟德越,申彦峰,沈虹,孙孝峰. 双重移相控制与传统移相控制相结合的双有源桥式DC-DC变换器优化控制策略[J]. 电工技术学报, 2016, 31(19): 97-105.
Wu Junjuan, Meng Deyue ,Shen Yanfeng, Shen Hong ,Sun Xiaofeng. Optimal Control Strategy of Dual Active Bridge DC-DC Converter with Combined Dual-Phase-Shift and Traditional-Phase-Shift Controls. Transactions of China Electrotechnical Society, 2016, 31(19): 97-105.
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