单位功率因数三相PWM整流器的设计

摘要

In view of problem of electric harmonic pollution produced by diode rectifier and phase-controlled rectifier, a three-phase unity power factor PWM rectifier was designed. The topology of powercircuit, control strategy of PWM rectifier and design methods of hardware circuit and software were introduced in details. The experiment result showed that the PWM rectifier adopts control strategy of direct current of double loop-closed of voltage and current, which has high power factor and low total harmonic distortion in AC-side, and reduces pollution to power network.%针对传统的二极管整流器和相控整流器对电网造成的谐波污染问题,设计了一种单位功率因数三相PWM整流器,详细介绍了该整流器功率电路的拓扑结构、PWM整流器的控制策略、硬件电路和软件设计方法.实验结果表明,该PWM整流器采用电压电流双闭环的直接电流控制策略,网侧功率因数高,谐波畸变率低,减小了对电网的污染.