摘要
为实现LED无频闪且满足地铁照明功率因数不应低于0.9的要求,提出了无频闪多路LED照明PFC变换器。通过推导该变换器工作在临界连续模式(Critical Continuous Mode,CRM)下的输入电流表达式,证明其具有功率因数校正(Power Factor Correction,PFC)功能。在软件PSIM中搭建了一台三路输出仿真电路,证明该变换器解决了传统单级LED驱动器输出二倍工频电流纹波过大导致的工频闪烁问题。此外,该变换器还具有各支路输出电流均流的特性及固有短路保护特性。
To achieve the performance of flicker-free LED and realize the power factor of metro lighting higher than 0.9,a novel flicker-free multi-output LED lighting PFC converter was proposed.By deriving the input current expression of the converter working in critical continuous mode(CRM),it was proved that it had the function of power factor correction(PFC).A three-output simulation circuit was built in the software PSIM,which proved that the converter solved the problem of power frequency flicker caused by the traditional single-stage LED driver output double the power frequency current ripple.In addition,the converter also had the characteristics of current sharing of each branch and the inherent short-circuit protection characteristics.
作者
杨琦
陈永丰
杨进
YANG Qi;CHEN Yongfeng;YANG Jin(Guangzhou Railway Polytechnic,Guangzhou 510430,China;Guangzhou Design Company of China Railway Siyuan Survey and Design Group,Guangzhou 510600,China)
出处
《电工技术》
2020年第9期1-4,共4页
Electric Engineering
基金
广州铁路职业技术学院科研项目(编号GTXYY1703)。
关键词
无频闪
多路
功率因数校正
均流
flicker-free
multi-output
power factor correction
current sharing
