A New Asymmetrical Current-fed Converter with Voltage Lifting

• Main Author: DELSHAD, M.
• Format: Article
• Language: English
• Published: Stefan cel Mare University of Suceava 2011-05-01
• Series: Advances in Electrical and Computer Engineering
• Subjects: active clamp; current-fed; DC-DC converter; high voltage gain; Zero Voltage Switching
• Online Access: http://dx.doi.org/10.4316/AECE.2011.02005

This paper presents a new zero voltage switching current-fed DC-DC converter with high voltage gain. In this converter all switches (main and auxiliary) turn on under zero voltage switching and turn off under almost zero voltage switching due to snubber capacitor. Furthermore, the voltage spike across the main switch due to leakage inductance of forward transformer is absorbed. The flyback transformer which is connected to the output in series causes 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 verify the integrity of the proposed converter.