High frequency link transformer secondary side control DC-DC power converter

This paper presents a novel topology of a voltage source zero-voltage switching (ZVS) high frequency inverter type DC-DC power converter with a transformer link, which incorporates zero-current switching (ZCS) mode synchronous phase shifted PWM active power switches into the diode arms of a full-bridge or center tapped rectifier. By implementing the proposed power converter, switching and conduction dissipated power losses of all the active power devices can be reduced which is based on circulating and idling current flowing through a high frequency transformer link compared with the previously-developed soft-switching full-bridge inverter type DC-DC power converter with a phase-shifted PWM scheme in the high frequency transformer primary side. This converter has been assessed on the basis of the simulation operating analysis and performance analysis, together with some experimental results of 2 kW-40 kHz breadboard set up.

1. Introduction

To make better improvements of power conversion efficiency, power density, electromagnetic conductive and radioactive noises and voltage regulation performances of the switching mode power supply systems (SMPS) used in the industrial, telecommunication, space, automobile and medical energy conditioning and processing plants, a variety of switching mode DC-DC power converter circuit topologies incorporating soft-switching commutation scheme have been investigated and actively developed so far for small power and high power applications [1] [2] [3].