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 used in a wide range of applications, including residential, commercial, aerospace, and traction systems, and switched-mode power supplies (SMPS). This paper aims to address the issues associated with the conventional continuous conduction mode boost converter utilized for power factor correction (PFC) applications, which, despite its high input power factor and simplicity, suffers from conduction losses in the input rectifier bridge and switching losses due to high switching frequencies. The proposed methodology introduces a novel Enabling Window Control (EWC) technique that reduces switching losses and enhances efficiency, particularly under low input voltage and light-load conditions. Additionally, the EWC method mitigates electromagnetic interference noise and minimizes driving loss of the main switch. A comprehensive comparison of various dc/dc converters such as buck, boost, buck-boost, cuk, and sepic, both with and without the EWC method, is presented. Simulation results obtained through MATLAB/SIMULINK are included to validate the effectiveness of the proposed study.