DC power supply based on single-phase matrix converter with reduced number of switches

Abstract

In this paper, a single-phase DC power supply based on single-phase matrix converter (SPMC) with reduced number of switches is proposed. In the proposed approach, only six switches of the typical SPMC topology are used to convert the voltage 240 Vrms (50Hz) input to a 12 VDC DC link. In the proposed topology a current control loop is used to ensure that the supply current waveform is continuous, sinusoidal and in-phase with the supply voltage resulting in high input power factor with low total harmonic distortion (THD) level. Therefore, the input currents are of a high quality and devoid of low frequency harmonics under varying load conditions, inherently. Simulation results verify the feasibility of the proposed converter.