PWM整流器中支撑电容的研究

随着电力电子技术的发展以及人们对电路中谐波危害的认识,PWM整流技术以其功率因数高,对电网产生的谐波冲击小而得到了迅猛的发展。但以往对电路中的关键部件———支撑电容选取的研究不是很充分,使得支撑电容的选取具有一定的盲目性。从电路的功率传递关系出发,得到了支撑电容的一种计算公式,并通过仿真验证了此公式的正确性。

Research on Support Capacitor of PWM Rectifier

With the development of power electronics and the cognition of harmonic harm in circuit,PWM rectifier has made great progress for it having high power factor and small harmonic impulsion.But in the past,one of key parts support capacitor hasn't been studied enough,so we may be have big blindness when we select the support capacitor value.This paper derives a formula for calculating support capacitor from the relation of power transfer in rectifier,and proves the correctness of its through simulation.