Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2025 , Vol. 59 >Issue 6: 789 - 799

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.389

New Type Power System and the Integrated Energy

Dual-Transformer Series Resonant Converter with Full Range ZVS Operation

  • LI Yinan ,
  • HU Song ,
  • LI Xiaodong ,
  • CHEN Wu ,
  • ZHONG Liping ,
  • YANG Qingqing
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  • 1. School of Electrical Engineering and Automation, Changshu Institute of Technology, Suzhou 215500, Jiangsu, China
    2. Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
    3. School of Electrical Engineering, Southeast University, Nanjing 210096, China

Received date: 2023-08-11

  Accepted date: 2023-12-26

  Online published: 2024-03-28

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Abstract

A dual-transformer series resonant converter (DTSRC) is proposed to solve the problem of excessive return power and loss of zero voltage switching (ZVS) operation under light load in the dual bridge resonant converter (DBRC). A dual-transformer structure is employed on the proposed converter, which can significantly reduce voltage stress across the transformers. Additionally, the ZVS operation under light-load conditions is achieved and switching losses are minimized by optimizing the turns ratio coefficient. To eliminate backflow power and reduce conduction loss, a minimum current trajectory (MCT) control strategy is implemented for the DTSRC. Thus, synchronous rectification is realized on the secondary side, which makes the converter always operate with minimum current. Finally, a 200 W/100 kHz prototype is built to verify the effectiveness of the proposed solution. The experimental results demonstrate that the ZVS of all active switches is achieved during full power ranges, and the overall operating efficiency of DTSRC exceeds 90%.

Key words： series resonant converter; zero voltage switching (ZVS); minimum current; switching loss; conduction loss

Cite this article

LI Yinan , HU Song , LI Xiaodong , CHEN Wu , ZHONG Liping , YANG Qingqing . Dual-Transformer Series Resonant Converter with Full Range ZVS Operation[J]. Journal of Shanghai Jiaotong University, 2025 , 59(6) : 789 -799 . DOI: 10.16183/j.cnki.jsjtu.2023.389

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