Asynchronous Motor Drive System Using an Improved APFC Converter

Abstract

Due to the high input current harmonics created from the power diodes as well as the switching of the inverter, the power factor cannot achieve a unity power factor. This paper presents an improved active power factor correction (APFC) converter for three-phase asynchronous motor drive system. This improved APFC operating in a discontinuous inductor current mode based on bridgeless canonical switching cell is designed and corrects the power factor in grid. In order to obtain high performance of the motor drive system, the dual-mode control strategy and the fuzzy PID is used in this system. Finally, the whole system is verified by software simulation and hardware experiment.