A new asymmetrical DC-DC converter with high voltage gain

Abstract

This paper presents a new zero voltage switching current-fed DC-DC converter with high voltage gain. In this converter all switches turn on under zero voltage zero current switching and turn off under almost zero voltage switching. Furthermore, the voltage spike across the main switch due to leakage inductance of forward transformer is absorbed. The flyback converter which is connected to the output in series, lead to high voltage gain and less voltage stress on the power devices. Considering high efficiency and voltage gain of this converter, it is suitable for green generated systems such as fuel cells or photovoltaic systems. The presented experimental results confirm the integrity of the proposed converter. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.