带PID调节的单周期LED电源  

Single-cycle LED power with PID adjustment

作　　者：张磊[1] 孟庆端[1] 

机构地区：[1]河南科技大学,河南洛阳471003

出　　处：《电源技术》2013年第1期127-129,共3页Chinese Journal of Power Sources

摘　　要：LED被称为是新的绿色光源。作为照明光源长期使用时,其伏安特性的非线性,对电源的稳定性提出了非常苛刻的要求。利用带有RCD吸收电路的单端反激拓扑结构实现从市电直接获取电能,并采用电流单周期和传统PID控制相结合的方法实现LED的恒流驱动,解决了负载或电网输入侧发生较大波动时,功率因数降低的问题。LED is a new green light source.When LED operates normally for a long period,its non-linear IV characteristic has high requirement on the power stability.In this paper,the single-ended Flyback topology circuit with RCD absorption component was employed to obtain electric energy from the mains,and both the current single-cycle control and the traditional PID control methods were adopted to achieve the constant current LED driver,and solve the power factor reducing problem under the condition of larger fluctuation from either loads or power input side.

关 键 词：LED 恒流驱动 电流单周期控制 单端反激 

分 类 号：TM131.4[电气工程—电工理论与新技术]