AVERAGE CURRENT CONTROL MODE BOOST CONVERTER FOR THE TUNING OF TOTAL HARMONIC DISTORTION & POWER FACTOR CORRECTION USING PSIM

Abstract

The aim of this paper is to investigate the Total Harmonic Distortion (THD) and power factor (PF) correction of Boost Converter under an average current-mode control technique. Boost converter technique can perform this type of active power-factor correction technique in many discontinues/continuous modes. Boost converter is usually used because it is easy to implement and it works well. Comparative evaluation using average current control method is used in the ac-dc converter to improve total harmonic distortion (THD). Average current tracks the input current with a high degree of accuracy. This is important in high power factor pre-regulators, enabling less than 5% total harmonic distortion (THD) to be achieved with a relatively small inductor. Average current mode control technique works well even when the mode boundary is crossed into the discontinuous mode at low current levels. The outer voltage control loop is oblivious to this mode change. Simulation and hardware results of simple bridge rectifier, Boost Converter open loop and Boost Converter close loop using average current mode control are presented in this paper. A step change at Load end is applied in order to show that the response of the system is stable. All the converters are simulated by PSIM Software and experimental results are presented to demonstrate the superiority of the proposed system. Both simulation and experimental results verify the validity of the proposed system.