用于1kW电源的有源功率因数校正器

Application of active power factor correction technology in the power source of 1 kW

本文将有源功率因数校正PFC技术应用于 1kW电源 .电路结构运用了升压斩波电路 .其主要思想是 :选择输入电压为一个参考信号 ,使得输入电流跟踪参考信号 ,实现输入电流与输入电压为一个近似同频同相的正弦波形 ,由此提高PF和抑制谐波 ;同时采用电压反馈 ,使输出电压为近似平滑的稳定直流输出电压 .其主要优点是 :装置可得到较高的功率因数 ;THD值低 ,可在较宽的输入电压范围内工作 ;体积小 。

This paper is mainly about the applications of active power factor correction (APFC) technology in the power source of 1?kW.The structure of the circuit is the boost. The way of fulfillment is presented below: the input voltage is chosen as the reference signal. By tracking this signal, the wave of input current is regulated to be the same as that of input voltage in phase and frequency approximately. Hence, the improving PF and restraining harmonic are reached. Meanwhile, the feedback of output voltage stabilize and smooth the DC output voltage. The advantage of the equipment is that the high PF and low THD can be obtained. The equipment with low weight and little volume can work in the wide spectrum of input voltage.