Power quality improvement techniques in AC-DC Cuk Converter

The Improved Power Quality AC-DC Converters (IPQCs) provides enhanced power quality in terms of improved power factor and reduced Total Harmonic Distortion (THD) at the utility interface. This paper addresses the power factor correction techniques for high frequency isolation based single phase Buck-Boost AC-DC Cuk Converter, which consists of only one switch resulting in reduced THD and improved power factor. With an awareness of modern design trends towards improved performance, the proposed converter is designed for low power rating and low output voltage, typically 20 W with 13.5 V. To validate the design of the converter at the primary stage, simulation is performed at lower as well as at higher loads.