一种基于APFC的大功率LED驱动电路的研究

Research on A High-Power LED Driver Circuit Based on APFC

研究了一种基于Boost原理的大功率LED驱动电路,采用有源功率因数校正(APFC)技术,选择平均电流控制法控制电路,一个电流环和一个电压环组成双闭环控制系统,使输入电流跟踪输入电压,以实现功率因数校正及降低输入端总谐波畸变的目的。基于PSIM软件进行仿真研究,得到了理想的效果,验证了该LED驱动电路的可行性。

A high-power LED driver circuit is investigated based on Boost principle and active power factor correction （APFC） technology. By using average current control method to control the circuit with a double closed loop control system composed of one current loop and one voltage loop, power factor correction and reducing the input total harmonic distortion through input current tracking input voltage is realized. Simulation results show that this circuit is feasible for a high-power LED driver by PSIM software.