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Dual active bridge (DAB) current optimization operation has been widely concerned. The DAB phase shift ratios can be selected to minimize the objective function and optimize the RMS current. This paper presents the RMS current expression of DAB under five operation modes. Then, the Lagrange multiplier method is used to obtain the local optimal solution in each mode. By comparing the local optimal solution and the minimum RMS current in each mode, the global optimal solution of RMS current minimization is obtained. The simulation results show that the proposed TPS modulation strategy can reduce the RMS current and current stress, and improve the operation efficiency of DAB.

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Optimal Phase Shift Control to Minimize RMS Current for Dual Active Bridge Converter

  • 会议论文

  • 发表日期：

    2025年

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  • Baolong Liu,
  • Kun Wei,
  • Peng Zhu,
  • Yuxin Niu,
  • Zhaolong Sun

摘要

Dual active bridge (DAB) current optimization operation has been widely concerned. The DAB phase shift ratios can be selected to minimize the objective function and optimize the RMS current. This paper presents the RMS current expression of DAB under five operation modes. Then, the Lagrange multiplier method is used to obtain the local optimal solution in each mode. By comparing the local optimal solution and the minimum RMS current in each mode, the global optimal solution of RMS current minimization is obtained. The simulation results show that the proposed TPS modulation strategy can reduce the RMS current and current stress, and improve the operation efficiency of DAB.