高精度高功率因数原边控制CRM反激LED驱动电源  

High accuracy high power factor primary side regulation CRM flyback LED driver

作　　者：高旭[1] 许建平[1] 阎铁生[1] 

机构地区：[1]磁浮技术与磁浮列车教育部重点实验室,西南交通大学电气工程学院,四川成都610031

出　　处：《电工电能新技术》2015年第11期69-74,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金(51177140);中央高校基本科研业务费专项资金(2682013ZT20)资助项目

摘　　要：研究了无光耦的原边控制(PSR)高功率因数临界连续导电模式(CRM)反激变换器的工作原理。针对高功率因数CRM PSR反激变换器输出电流精度受输入电压影响的问题,提出了一种新型高精度高功率因数CRM PSR反激变换器。通过引入输入电压前馈控制,消除了输入电压对LED驱动电源输出电流精度的影响,最后通过实验验证了理论推导的正确性。The operation theory of the primary side regulation（ PSR） high power factor（ PF） critical conduction mode（ CRM） flyback LED driver without optocoupler is analyzed in this paper. Through analyzing the operation theory of traditional PSR high PFC CRM flyback LED driver,the relationship between input voltage and the error output current is given. In order to improve the output current accuracy of PSR high PF CRM flyback LED driver,a novel high accuracy high power factor CRM PSR flyback LED driver is proposed. By introducing the control with input voltage feed-forward to eliminate the influence of the input voltage to the output current accuracy of the LED driver,high accuracy high power factor PSR CRM flyback LED driver can be achieved. So that the use of primary side regulation on LED driver is more feasible. Finally,the experimental results of traditional and proposed PSR high PFC CRM flyback LED driver verify the correctness of the theoretical derivation.

关 键 词：原边控制 临界连续模式 反激变换器 输入电压前馈 LED驱动器 

分 类 号：TM461[电气工程—电器]