Design, Control and Simulation of a High-Efficiency Low-Cost DC-DC Converter for High Current Applications

Abstract

In this paper, a two-stage DC-DC converter for high current applications is studied. The converter consists of two three-phase full-bridge inverters connected through three AC inductors. First, a switching-functions based model of the converter is establishes, and then a control scheme is designed for both inverters in order to ensure a high power factor at the AC stage, and a regulated voltage at the DC load. The performance of the proposed control system is verified through numerical simulations