广西师范大学学报（自然科学版）2024，Vol.42Issue(5)：61-71,11.DOI:10.16088/j.issn.1001-6600.2023100901
变化负载下全桥LLC谐振变换器参数优化设计
Parameter Optimization Design of Full-Bridge LLC Resonant Converter under Variable Load
摘要
Abstract
LLC resonant converter has some limitations in soft switching characteristics.Aiming at the problem of unstable soft switching characteristics of LLC resonant converter under variable load conditions,the soft switching constraints are derived based on ZVS/ZCS boundary.A set of parameter optimization design method based on full-bridge LLC resonant converter under variable load is proposed to improve the stability and efficiency of the system.The scheme not only considers the parameter optimization of resonant inductor,capacitor and transformer,but also fully considers the influence of load change on soft switching behavior.The working principle of the full-bridge LLC resonant converter is introduced,and the voltage gain and the impedance characteristics of the resonant network are analyzed in detail.According to the above design scheme,a 500 W vehicle charger test prototype is built and tested under laboratory conditions.The results show that the maximum efficiency of the test prototype can reach 96.36％.关键词
LLC谐振变换器/可变负载/软开关/参数优化/谐振网络Key words
LLC resonant converter/variable load/soft switch/parameter optimization/resonant network分类
信息技术与安全科学引用本文复制引用
王党树,孙龙,董振,贾如琳,杨黎康,吴家驹,王新霞..变化负载下全桥LLC谐振变换器参数优化设计[J].广西师范大学学报（自然科学版）,2024,42(5):61-71,11.基金项目
国家自然科学基金(51777167,51604217) （51777167,51604217）
