Scholarlink

<p>A current-fed isolated bidirectional DC–DC resonant converter has the advantages of wide voltage gain, low current ripple, and power transfer in both directions, but input voltage and load changes affect the resonant current during switching, influencing the soft switching performance of the converter. When the converter cannot achieve soft switching, its operating frequency is limited, and its operating efficiency is greatly reduced. In this study, an interleaved boost-integrated bidirectional CLLC resonant converter with a fixed-frequency synchronous PWM control strategy is comprehensively analyzed for the soft switching operating range. Considering the semiconductor junction capacitance, the design guidelines for the full-range soft switching parameters of the converter are given, including the design of the transformer turns ratio, input inductance, resonance impedance, and inductance ratio. The experimental results based on GaN–HEMT verify the validity of the converter and the correctness of the theoretical analysis.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Soft switching characteristic analysis and design of an interleaved boost-integrated bidirectional CLLC resonant converter

  • 期刊论文

  • 发表日期：

    2025年7月2日

查看全文
  • Fangyong Wang,
  • Shucheng Li,
  • Bangyin Liu,
  • Jing Chen,
  • Rui Li,
  • Weilong Zhang,
  • Li Fang,
  • Zhengqing Zhang

摘要

A current-fed isolated bidirectional DC–DC resonant converter has the advantages of wide voltage gain, low current ripple, and power transfer in both directions, but input voltage and load changes affect the resonant current during switching, influencing the soft switching performance of the converter. When the converter cannot achieve soft switching, its operating frequency is limited, and its operating efficiency is greatly reduced. In this study, an interleaved boost-integrated bidirectional CLLC resonant converter with a fixed-frequency synchronous PWM control strategy is comprehensively analyzed for the soft switching operating range. Considering the semiconductor junction capacitance, the design guidelines for the full-range soft switching parameters of the converter are given, including the design of the transformer turns ratio, input inductance, resonance impedance, and inductance ratio. The experimental results based on GaN–HEMT verify the validity of the converter and the correctness of the theoretical analysis.