Application Research Of Three-phase PFC In Frequency Converter

Diode rectifiers in common frequency inverter pro- duce harmonic into power system and cause bad power quality.This paper applies three phase power factor cor- rection technique on frequency inverter to develop a new frequency inverter that has high power factor and low harmonic. The main solutions are focused on constant voltage control method of PFC,combination of PFC with frequen- cy inverter control method,output filter design.The simulation certifies the feasibility of this technique. This technique will pruoduce good ecnomic and social benefits. The load range,dynamic response,energy feedback problems in practice are also researched.And control circuit with UC3868 of UNITRODE is developed.