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Extended-Phase-Shift (EPS) mode offers a promising approach to improving the efficiency of isolated bidirectional DC–DC converters compared to conventional single-phase-shift control methods. This research paper investigates the dynamics of power flow concerning phase shift ratios and identifies optimal conditions for maximum power transfer. Additionally, it provides a comprehensive analysis of switching characteristics under the extended phase shift operation of a Dual Active Bridge (DAB) DC–DC converter. The EPS control technique introduces two degrees of freedom: an internal phase shift within a single H-bridge and an external phase shift ratio. This enables precise control over power flow and voltage regulation under various load conditions, thereby enhancing converter performance. To control the output voltage and achieve higher efficiency, a Proportional-Integral (PI) controller has been implemented. The converter model operating in EPS mode has been simulated using MATLAB SIMULINK.

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Performance Analysis of Bidirectional Dual-Active-Bridge Isolated DC–DC Converter Using EPS Modulation

  • 会议论文

  • 发表日期：

    2025年

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  • Suraj Chauhan,
  • Sandeep Kumar Singh,
  • Sarika Srivastava,
  • Shivani Singh,
  • Divyanshi Tiwari,
  • Neha Maurya

摘要

Extended-Phase-Shift (EPS) mode offers a promising approach to improving the efficiency of isolated bidirectional DC–DC converters compared to conventional single-phase-shift control methods. This research paper investigates the dynamics of power flow concerning phase shift ratios and identifies optimal conditions for maximum power transfer. Additionally, it provides a comprehensive analysis of switching characteristics under the extended phase shift operation of a Dual Active Bridge (DAB) DC–DC converter. The EPS control technique introduces two degrees of freedom: an internal phase shift within a single H-bridge and an external phase shift ratio. This enables precise control over power flow and voltage regulation under various load conditions, thereby enhancing converter performance. To control the output voltage and achieve higher efficiency, a Proportional-Integral (PI) controller has been implemented. The converter model operating in EPS mode has been simulated using MATLAB SIMULINK.