Abstract：Phase-shift modulation，as a conventional modulation strategy for dual active bridge（DAB）

converters，has the drawback of excessive inductor current peak-to-peak value when the voltages on both sides are

mismatched. Therefore，based on an improved dual phase shift（IDPS）modulation combined with duty cycle

modulation，an asymmetric improved dual phase shift（AIDPS）modulation strategy was proposed. Firstly，the

working principle of AIDPS modulation was introduced，and the working modes，power transfer model，and

inductor current peak-to-peak value model were established. Then，the Karush-Kuhn-Tucker（KKT）conditions

were employed to derive the globally optimal modulation solution with the objective of minimizing the inductor

current peak-to-peak value. Finally，an experimental platform was built to verify the effectiveness of the proposed

modulation strategy in reducing inductor current peak-to-peak value and improve the efficiency of the converter.

        Key words：dual active bridge（DAB）converter；asymmetric；improved dual phase shift（IDPS）

     Format Citation:李龙霄，赵世伟. DAB变换器非对称改进双重移相调制策略研究[J].电气传动, 2026,56(07):22-28. LI Longxiao，ZHAO Shiwei. Research on asymmetric improved dual phase shift modulation strategy of DAB converter [J].Electric Drive,56(07):22-28.