高功率因数开关电源的研究

Study on High Power Factor Switching Mode Power Supply

普通开关电源采用电容输入型二级管整流电路,使输入电流呈脉冲波形,造成功率因数很低。如何提高开关电源的功率因数已经成为电源设计工程师的首要任务。文章给出了高功率因数高频开关电源系统的总体设计方案,并在此基础上,对各电路的工作过程进行了简单介绍。

Capacitor input type diode rectifier circuit is adopted in common switching mode power supply, which makes input current as pulse waveform. So that the power factor is low. It is urgent to increase the power factor of switching made power supply. Based on the issues of PFC and high harmonic suppression, a high power factor switching mode power supply is designed. And some key technologies are discussed.