A Current-stress-optimized Control Strategy for DAB Converter Using Hybrid Modulation

Aimed to reduce inductor current of DAB converter, a current-stress-optimized control strategy using hybrid modulation is proposed in this paper. The fundamental components of the voltages on both sides of the transformer are extracted and an equivalent circuit is established. In the corresponding vector diagram, the minimum value of inductor current under different power conditions can be obtained by adjusting the voltages of primary and secondary sides and the included angle. Finally, the effectiveness and correctness of proposed strategy is verified by simulation, whose results show that the proposed method can effectively reduce the root-mean- square value of the inductor current.