INPUT POWER-FACTOR CONTROL OF AC-DC SERIES RESONANT DC LINK CONVERTERUSING PID OPERATION

This paper proposes a method of power factor control for the three-pha se input current of ac-dc series resonant de link converter systems, T he proposed system has fast response, using high frequency resonance, soft switching (zero current switching), and natural commutation of th yristor switches, By implementing the PID operation strategy for switc hing control, the system performs reliable operation in the input powe r factor control, and the elimination of higher harmonic components ca n be achieved dramatically, The numerical and experimental results are presented in this paper.