Scholarlink

Regarding the issue that the traditional soft-switching control strategy of the four-switch Buck-Boost (FSBB) converter cannot be applied to high-power applications, an improved variable-frequency control strategy for high-power scenarios is proposed. Under light and medium loads, variable-frequency soft switching is adopted for single-converter operation, while under heavy loads, variable-frequency hard switching is employed for interleaved parallel operation of two converters. Additionally, smooth closed-loop PI output is maintained across the entire power range during load adjustments. Finally, simulation verification is conducted using Simulink, with an input voltage range of 36–72 V, an output voltage of 48 V, a power rating of 1000 W, and a peak efficiency of 97%, validating the effectiveness of the proposed control strategy.

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

Design of a High-Power Interleaved Parallel Four-Switch Buck-Boost Converter

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Feng Zhang,
  • Yanbin Liu,
  • Yinfeng Zhang,
  • Xing Liu,
  • Xiaohan Zhang

摘要

Regarding the issue that the traditional soft-switching control strategy of the four-switch Buck-Boost (FSBB) converter cannot be applied to high-power applications, an improved variable-frequency control strategy for high-power scenarios is proposed. Under light and medium loads, variable-frequency soft switching is adopted for single-converter operation, while under heavy loads, variable-frequency hard switching is employed for interleaved parallel operation of two converters. Additionally, smooth closed-loop PI output is maintained across the entire power range during load adjustments. Finally, simulation verification is conducted using Simulink, with an input voltage range of 36–72 V, an output voltage of 48 V, a power rating of 1000 W, and a peak efficiency of 97%, validating the effectiveness of the proposed control strategy.