Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Input-series hybrid dual active bridge DC-DC converter combined with LC resonant tank

  • Fu, Chao (Department of Electrical Engineering, North China Electrical Power University) ;
  • Xu, Chongwei (Department of Electrical Engineering, North China Electrical Power University) ;
  • Sun, Yuwei (Department of Electrical Engineering, North China Electrical Power University)
  • Received : 2020.10.15
  • Accepted : 2021.05.03
  • Published : 2021.08.20
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Abstract

This paper presents an input-series hybrid dual active bridge (DAB) converter for efficiency improvement. The proposed converter is achieved by integrating a series resonant tank (SRT) into a single phase-shift (SPS) controlled DAB that shares one H-bridge at the secondary side. By using the super-resonant state of the LC tank, the phase correction of the secondary side H-bridge current can be obtained to realize zero voltage switching (ZVS), zero current switching (ZCS), and full load ZVS for the primary side bridges. In addition, the circulating current is reduced when compared to that of the traditional input-series DAB converter based on SPS control, which improves the overall efficiency. The system modelling and parameters design procedures are provided. Finally, a 1-kW experimental prototype was built, and the soft-switching performance was tested. The obtained results verify the effectiveness of the proposed topology and demonstrate a significant efficiency improvement.

Keywords

Acknowledgement

This work was supported in part by the Natural Science Foundation of Hebei Province, China, under Grant E2019502172, and in part by the Fundamental Research Funds for the Central Universities, under Grant 2019MS075. The authors would like to thank Zhen Gao for his previous work.

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