Input switched high performance single phase single switch Ćuk AC-DC converter

Abstract

Single phase full wave bridge rectifier draws non sinusoidal current from a sinusoidal voltage source which causes low performance of the rectifier. Switching mode regulators are used to improve the shape of current and power factor of the input side. In this paper a different type of single phase single switch AC-DC converter using Ćuk topology is reported. Input current is chopped in this converter at high frequency during both cycles by a single switch to get step up/step down conversion. Comparison is made between reported and conventional circuit under same load and operating conditions. This proposed circuit shows better performance. The efficiency of this converter is also high. Any other control scheme is not required to achieve these advantages.