Abstract: “This paper presents a comparative study of single phase multilevel AC/DC converters. The simulation results are analyzed for different topologies with variations in load current and input power supply keeping the reference output voltage constant. In all the topologies only pulse width modulation (PWM) control scheme is used with hysteresis current controller. Simulations are carried out in MATLAB SIMULINK for fundamental frequency of 50 Hz for resistive loads only. Performance analysis shows that structure of these topologies have wide use in industrial applications as they have nearly unity power factor.”

Keywords: Pulse width modulation (PWM), improved power