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Dual Active Bridge (DAB) topology is a high-power isolated DC-DC converter, which is used when the power flow between the two stages is bidirectional. This topology has various benefits like Zero Voltage Switching (ZVS) characteristic, less number of passive elements, and high power density. The switching losses are reduced when the converter is operated in ZVS than the hard switching method. A very simple and intuitive control method is selected in this paper for analysing the converter’s ZVS range, so this method is very simple to implement. The power flow is controlled in the converter by varying the phase shift angle between the bridges. This paper presents the phase shift-based power flow control method and analyses the performance of the converter in the ZVS range. A 1.5 kW DAB with the leakage inductance value of 375 µH is designed and simulated to analyse the ZVS range to improve the efficiency.

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Analysis of ZVS Range of Single-Phase Shift Modulation for Bidirectional Dual Active Bridge DC-DC Converter in Electric Vehicle

  • 会议论文

  • 发表日期：

    2025年

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  • B. R. Bhavaesh,
  • Madhavan Velraj,
  • S. Krishnaveni,
  • K. K. Uthira Ramya Bala,
  • J. Jayachandran

摘要

Dual Active Bridge (DAB) topology is a high-power isolated DC-DC converter, which is used when the power flow between the two stages is bidirectional. This topology has various benefits like Zero Voltage Switching (ZVS) characteristic, less number of passive elements, and high power density. The switching losses are reduced when the converter is operated in ZVS than the hard switching method. A very simple and intuitive control method is selected in this paper for analysing the converter’s ZVS range, so this method is very simple to implement. The power flow is controlled in the converter by varying the phase shift angle between the bridges. This paper presents the phase shift-based power flow control method and analyses the performance of the converter in the ZVS range. A 1.5 kW DAB with the leakage inductance value of 375 µH is designed and simulated to analyse the ZVS range to improve the efficiency.