一种单相PFC实用电路的设计

The design of practical circuit of single-phase PFC

研究了一种基于升压斩波的单相功率因数校正电路以抑制由LED驱动电源引起的谐波电流.采用误差滞环比较方式的电流跟踪控制和输出电压控制,并对电路参数进行计算.实验结果显示,用滞环比较跟踪的方法能够使电流波形跟踪电压波形,达到功率因数校正的目的.

In order to curb harmonic current caused by LED drive power,one of circuit of single-phase PFC based on Boost is introduced.Current tracking control based on the mode of error-hysteresis and output voltage control were used,and the calculation of circuit parameter is given.Simulation and experimental result show that the method can make current waveform track voltage waveform to achieve the objective of power factor correction.