单位功率因数三相PWM整流器设计_李小喜.pdf

# 68 # 工矿自动化 2011 年8 月 cir cuit , cont rol st rateg y o f PWM rect if ier and desig n met ho ds of hardw are cir cuit and so ft w are w er e intr oduced in det ails. T he ex periment result show ed t hat t he PWM rect if ier adopts cont rol str at egy o f dir ect current of double loop- closed of volt age and current, w hich has hig h pow er f act or and low to tal harmonic dist o rtio n in A C- side, and reduces pollut io n t o pow er netw o rk. Key words: PWM rect ifier, pow er f act or, double lo op- closed co nt rol 0 2 PWM , PWM PWM , , , , , , 1- 2] P WM , , , / PWM 2 0 P WM , , PWM , UPS 3- 5] , PWM , P WM , 2 PWM PWM 1 PWM * Udc Udc , 3 , PI , PI , Im , I m * , PWM , Udc = Udc , P I , , I m , , IG BT , C Udc , P I , 1 , Im , , , , Udc , Udc : , * Udc , PI , I m