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Phase-shifted Full-bridge ZVZCS Converter with Low Duty Cycle Loss
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Zelong FENG, Yong SHI, Yuting WANG, Kexin XU
Journal of Power Supply | 2025, 23(1) : 32 - 43
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Journal of Power Supply | 2025, 23(1): 32-43
• DC-DC Converters •
Phase-shifted Full-bridge ZVZCS Converter with Low Duty Cycle Loss
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Zelong FENG, Yong SHI, Yuting WANG, Kexin XU
Affiliations
  • School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
Published: 2025-01-30 doi: 10.13234/j.issn.2095-2805.2025.1.32
Outline
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Phase-shifted full-bridge zero-voltage zero-current switching(ZVZCS) converters are favored in high- power DC conversion applications owing to their advantages such as simple structures and high efficiency. However, high-power phase-shifted full-bridge ZVZCS converters still face problems including difficulty in the current reset and severe duty cycle loss. In response to the above issues, a novel phase-shifted full-bridge ZVZCS converter is put forward, which ensures that it can realize zero-current switching over a wide load range by introducing an auxiliary circuit on the primary side to reset the current to zero before the turn-on of lagging-leg switches. At the same time, it can accelerate the commutation speed on the primary side, reduce the duty cycle loss and realize an optimized design of power supply. Based on the analysis of the circuit structure, working principle and characteristics of the proposed converter, a 1 kW experimental prototype was designed to verify its correctness.

Phase-shifted full-bridge  /  zero-voltage zero-current switching(ZVZCS)  /  duty cycle loss
Zelong FENG, Yong SHI, Yuting WANG, Kexin XU. Phase-shifted Full-bridge ZVZCS Converter with Low Duty Cycle Loss[J]. Journal of Power Supply, 2025 , 23 (1) : 32 -43 . DOI: 10.13234/j.issn.2095-2805.2025.1.32
Funding
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  • Key Research and Development Project of Shaanxi Province(2024GX-YBXM-281)
Appendix
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Year 2025 volume 23 Issue 1
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420
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.1.32
  • Receive Date：2023-12-29
  • Online Date：2025-07-01
  • Published：2025-01-30
Article Data
Affiliations
History
  • Received：2023-12-29
  • Revised：2024-03-08
  • Accepted：2024-04-17
Funding
Key Research and Development Project of Shaanxi Province(2024GX-YBXM-281)
Affiliations
    School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
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