报告详情
Improved pulse width modulation strategy for CLLLC resonant converter
编号：94
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更新：2025-10-11 22:51:41 浏览：8次
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摘要
To address the issue of low efficiency under light load conditions when CLLLC converters employ fixed-frequency pulse width modulation, this paper proposes a fixed-frequency improved pulse width modulation strategy to optimize converter efficiency. First, the voltage gain expression of the converter is derived based on the First Harmonic Approximation (FHA) method. Subsequently, analytical expressions for soft switching implementation conditions are established through time-domain analysis, and the efficiency optimization mechanism of fixed-frequency improved pulse width modulation is thoroughly analyzed. Furthermore, a modulation parameter selection principle based on soft switching range is proposed. Experimental validation demonstrates that the proposed modulation strategy can significantly improve converter efficiency, with particularly pronounced effects under light load conditions. At 20% load, the converter efficiency reaches 97.3%. Under light load conditions, the efficiency improvement can be up to 4.27% compared to ordinary pulse width modulation .
关键词
CLLLC resonant converter,fixed-frequency improved pulse width modulation,efficiency optimization,soft switching
报告人
Yan Mao
student Huazhong University of Science and Technology稿件作者
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重要日期
-
会议日期
11月07日
2025
至11月09日
2025
-
10月12日 2025
初稿截稿日期
-
10月20日 2025
注册截止日期
主办单位
IEEE西南交通大学IAS学生分会
承办单位
西南交通大学电气工程学院
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
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