基于无源均流的谐振式无桥型Boost LED驱动电源  

Resonant Bridgeless Boost LED Driver Based on Passive Current Balancing

作　　者：史旭 刘雪山 周群[1] 王春涛 SHI Xu;LIU Xueshan;ZHOU Qun;WANG Chuntao(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,成都610065

出　　处：《电源学报》2024年第2期369-377,共9页Journal of Power Supply

基　　金：四川大学自贡市校地合作资助项目(2019CDZG-14);四川省区域创新合作资助项目(2021YFQ0006)。

摘　　要：传统Boost功率因数校正变换器的输出电压必须大于输入电压,在一定程度上限制了其在LED驱动电源中的应用。同时,传统LED驱动电源因输入端整流桥的存在而限制了自身效率的进一步提升。基于谐振式Boost功率因数校正变换器拓扑提出了一种无源均流型无桥Boost LED驱动电源,通过引入谐振式电容均流网络,实现了多路均流输出;通过整流桥的去除,进一步提升了系统的效率。最后,搭建了一台效率可达93.64%的140 W实验样机,验证了理论分析的正确性与可行性。For a traditional Boost power factor correction(PFC)converter,its output voltage must be greater than its input voltage,which limits its applications in light emitting diode(LED)drivers to a certain degree.Meanwhile,due to the existence of a rectifier bridge at the input end of the traditional LED driver,the improvement of its efficiency is also confined.In this paper,a bridgeless Boost LED driver based on passive current balancing is proposed,which is based on the topology of a resonant Boost PFC converter.With the introduction of a resonant capacitive current-balancing network,the output current of each LED string can be balanced.In addition,the elimination of the rectifier bridge further improves the system efficiency.Finally,a 140 W prototype with a peak efficiency of 93.64%was built,and experimental results verified the correctness and feasibility of theoretical analysis.

关 键 词：无桥变换器 LED驱动电源 功率因数校正 无源均流 

分 类 号：TM46[电气工程—电器]