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When the phase shift Angle of DAB changes, transient DC bias current will appear. In this paper, a transient DC bias current suppression strategy is proposed to achieve fast stability of DAB. The primary H-bridge voltage symmetry line is selected as the current starting point, and its steady-state current value is only related to the outward shift Angle. In this paper, an improved current stress minimization modulation strategy is proposed to realize the fast steady-state transition of the current waveform. At the same time, the transient current increment is controlled, and the transient current stress is effectively reduced. Finally, the effectiveness of the proposed improved current stress minimization strategy is verified by simulation.

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Transient DC Bias Current Suppression for Dual Active Bridge by Improved TPS Modulation Scheme

  • 会议论文

  • 发表日期：

    2025年

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

摘要

When the phase shift Angle of DAB changes, transient DC bias current will appear. In this paper, a transient DC bias current suppression strategy is proposed to achieve fast stability of DAB. The primary H-bridge voltage symmetry line is selected as the current starting point, and its steady-state current value is only related to the outward shift Angle. In this paper, an improved current stress minimization modulation strategy is proposed to realize the fast steady-state transition of the current waveform. At the same time, the transient current increment is controlled, and the transient current stress is effectively reduced. Finally, the effectiveness of the proposed improved current stress minimization strategy is verified by simulation.