THE POWER FACTOR CORRECTION IMPROVEMENT FOR A SINGLE PHASE AC/DC CONVERTER USING AN ENABLING WINDOW CONTROL

With the rapid development in the power electronics devices, DC power supplies are the wide range of application, including residential, commercial, and aerospace and traction system and SMPS. Normally, the conventional continuous conduction mode boost converter has been widely used for power factor correction (PFC) applications because of its high input power factor and simplicity, though it suffers from conduction loss in the input rectifier bridge and switching loss due to the high switching frequency. The efficiency decreases rapidly under the lower input voltage or the light-load work condition. In this paper, a novel Enabling Window Control (EWC) method is used to reduce the switching loss and to improve the efficiency. Moreover, electromagnetic interference noise and driving loss of the main switch can be reduced with the EWC method. And also we discuss and compare some of the dc/dc converters like buck, boost, buck-boost, cuk and sepic with and without using EWC method. Simulation results are obtained in the MATLAB/SIMULINK for the effectiveness of the study.