一种单级低开关应力无电解电容LED电源  

A Single-stage Low Switch Stress Electrolytic Capacitors-less LED Power Supply

作　　者：赵宽祥 酉家伟 刘宏勋[1,2] 凌跃胜[1,2] 田锐 ZHAO Kuanxiang;YOU Jiawei;LIU Hongxun;LING Yuesheng;TIAN Rui(State Key Laboratory of Reliability and Intelligence of Electrical Equipment(School of Electrical Engineering,Hebei University of Technology),Tianjin 300130,China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province(School of Electrical Engineering,Hebei University of Technology),Tianjin 300130,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学电气工程学院),天津300130 [2]河北省电磁场与电器可靠性重点实验室(河北工业大学电气工程学院),天津300130

出　　处：《电气传动》2022年第9期63-68,共6页Electric Drive

摘　　要：传统LED驱动电源中采用电解电容作为储能元件,但电解电容寿命短,限制了整体LED驱动电源的使用寿命。为提高电源寿命,在去除电解电容的基础上,提出一种单级低开关应力电路结构,通过引入由谐振电容与开关管构成的辅助回路,减小开关管开关应力,实现零电压开通,同时反馈漏感能量,提高电源整体效率。分析了该变换器拓扑结构的工作原理,给出模态分析和参数设计方法,试制实验样机验证单级低开关应力无电解电容LED电源的可行性。The electrolytic capacitor is used as the energy storage element in the traditional LED power supply.The life of electrolytic capacitor is short which limits the life of LED power supply.In order to improve the service life of the power supply,a single-stage low switch stress structure was proposed on the basis of removing the electrolytic capacitor。The auxiliary loop composed of resonant capacitor and switching tube was introduced to depress the switch stress and realize zero voltage switching(ZVS),meanwhile the leakage inductance energy was fed back and the overall efficiency of power supply was improved.The working principle of the topology was analyzed.The modal analysis and parameter design were given.The feasibility of the single-stage low switch stress LED power supply without electrolytic capacitor was verified by experimental prototype.

关 键 词：单级结构 低开关应力 谐振电容 零电压开通 无电解电容 

分 类 号：TM92[电气工程—电力电子与电力传动]