DOIONLINE

DOIONLINE NO - IJIEEE-IRAJ-DOI-1668

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International Journal of Industrial Electronics and Electrical Engineering (IJIEEE)-IJIEEE
Journal Home
Volume Issue
Issue
Volume-3, Issue-1  ( Jan, 2015 )
Paper Title
A New Soft Switching Flyback-Forward PWM DC-DC Converter
Author Name
Majid Delshad, M Taherpoor
Affilition
Electrical Engineering Department, Isfahan (Khorasgan) Branch, Islamic Azad University, Iran
Pages
57-62
Abstract
This paper presents a new soft switching flyback-forward PWM converter. The proposed circuit employs an auxiliary circuit to achieve soft switching condition for switches and also absorbs the voltage spikes caused by the leakage inductance of transformers in the converter. In the proposed converter main switch operates at ZVS and the auxiliary switch operates at ZCS. The proposed converter has some advantages such as the low output current ripple, sharing power between the magnetic elements and work at high power levels, soft switching condition in the both turn on and off switch. Soft switching condition is satisfied for both step-up (boost) and step-down (buck) in the proposed converter. Furthermore this converter has a high efficiency and low voltage stress. The converter is controlled by PWM. Keywords- Zero Current Switching (ZCS), Zero Voltage Switching (ZVS), Soft Switching, and PWM.
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