定频PWM控制方式单相APFC的研究

Study of APFC with Constant Switching Frequency PWM Method

分析了单相整流加Boost电路的APFC电路的工作原理,提出了电压电流双闭环的数字控制方法。为方便电路设计及降低开关损耗,采用基于DSP的定频PWM控制方式进行控制。仿真及实验结果表明所提出的方案合理可行。

This paper analyzes the working principle of APFC with single phase rectifier plus Boost circuit and presents the digital control method of double close - loop. In order to make the design of circuit easy and re- duce the switching loss, PWM of constant switching frequency is taken to drive the MOSFET based on DSP. The simulation and experimental results show the method is reasonable.