Power factor correction (PFC) of a single phase AC to DC Interleaved boost Converter by using novel control scheme

Abstract

In this paper, a controlled two stage single phase ac to dc three interleaved boost converters power factor correction (PFC) system based on operating with pulsewidth modulation (PWM) technique. Both converters are independently controlled by an inner control loop based on a sliding-mode (SM) approach that imposes minimum current ripple behavior on each cell. The switching of power electronics devices gives an average current control mode so that the power factor (PF) of the converter is high. The SM-based controller is designed to operate at a constant switching frequency so that the L-C filter of interleaving technique, which is recommended for ac–dc power conversion systems is stable and output power is higher than 0.5 kW. An outer loop regulates the output voltage by means of a proportional–integral (PI) compensator directly obtained from a small-signal model of the ideal sliding mode control dynamics. The control law proposed has been validated using numerical simulations and experimental results in a 0.5-kW prototype.