This paper discusses the impact of using 3-phase and multipules converter circuit commonly found in unity power factor at input AC mains and regulates output voltage.3-phase thyristor rectifiers have been used in industries for obtaining a variable

三相脉宽调制电流型整流器，可以用来实现单位因数功率运行。-Three phase PWM current source rectifier ，Can be used to achieve unity factor power operation.