Journal of Power Electronics

  • 제24권8호
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  • Pages.1241-1252
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  • 2024
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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DOI QR코드

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New ZVZCS TL DC-DC converter with combined operation modes

  • Kexin Xu (School of Electrical and Control Engineering, Shaanxi University of Science and Technology) ;
  • Yong Shi (School of Electrical and Control Engineering, Shaanxi University of Science and Technology) ;
  • Yuting Wang (School of Electrical and Control Engineering, Shaanxi University of Science and Technology) ;
  • Qianhe Zhang (School of Electrical and Control Engineering, Shaanxi University of Science and Technology) ;
  • Zelong Feng (School of Electrical and Control Engineering, Shaanxi University of Science and Technology) ;
  • Xiaoxin Wang (School of Electrical and Control Engineering, Shaanxi University of Science and Technology)
  • 투고 : 2023.07.31
  • 심사 : 2024.02.28
  • 발행 : 2024.08.20
⟨ 이전 논문 다음 논문 ⟩

초록

Three-level DC-DC converters (TLDCs) have attracted industrial and academic attention because of low main switching voltage ratings, simple clamping structure, and good soft-switching characteristics. This paper proposes a new TLDC with combined operation modes, which can operate in both zero-voltage switching (ZVS) and zero-voltage zero-current switching (ZVZCS) modes. The proposes converter varies soft switching mode with a simple switching combination of Sr1 and Sr2, and follows the best efficiency curves over a wide load range. Compared to conventional ZVS or ZVZCS TLDCs, this solution minimizes the circulating current and increases the overall efficiency. In addition, the current stress of the flying capacitor is also low. And, all these good features are realized by two low VA rating MOSFETs. This paper discusses the circuit, operating principles, and some steady-state characteristics. Finally, experimental data from a 1 kW prototype demonstrates the validity and characteristics of the proposed converter.

키워드

과제정보

This work was supported by the Key Research and Development Project of Shaanxi Province under the Grant number 2024GX-YBXM-281.

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