Design and Simulation of a New DC Power Supply Based on Dual Bridge Matrix Converter

A conventional high power dc power supply systems consist of a three-phasediode rectifier followed by a high frequency converter to supply loads at regulated dcvoltage. these rectifiers draw significant harmonic currents from the utility, resulting inpoor input power factor. in this paper, a dc power supply based on dual-bridge matrixconverter (dbmc) with reduced number of switches is proposed. in the proposed circuit,three switches convert the low frequency ac input to a dc link. a single-phase bridgeinverter converts the dc-link to a high frequency ac output. the output of the matrixconverter is then processed via a high frequency isolation transformer and rectified to theregulated dc voltage. in the proposed topology only a simple voltage control loop ensuresthat the output voltage is regulated against load changes as well as input supply variationsand the current control loop is not used to correct the input currents. theory analysis andsimulation are made to investigate performance of the proposed circuit. simulation resultsshow that in the proposed power supply with 7-switch, the input currents are of a highquality under varying load conditions and input voltage.