MODELLINGAND ANALYSIS OF FLYBACK CONVERTER

Abstract

In late 60’s demand made by space programs led to the development of power supplies that are highly reliable, efficient, light weight and small. The innovative ideas of the engineer’s usher in the era of modern power electronics and switch mode power supplies came into existence. Design and optimization of dc-dc converter which offers high efficiency, small converters with isolation transformers can have multiple outputs of various magnitudes and polarities. The regulated power supply of this type has a wide application such as digital systems, in TVs instrumentation system, in industry automation etc., where in a low voltage, high current power supply with low output ripple and fast transient response are essential. A new model has been proposed for the analysis of Flyback converter with coupled inductance. The model transforms any dynamic circuit into a resistive circuit. The method is based on the discrete equivalent circuit approach. In this way, a fully resistive flyback circuit has been obtained with discrete equivalents of coupled inductor and capacitor. The proposed model makes the analysis easier.