Analysis of power factor correction in AC-DC converters using frequency-clamped continuous conduction mode controller

Abstract

With increasing electricity demand throughout the world, the regulations for efficiency and power quality also increases. In order to meet this increased demand in AC/DC converters, power factor corrector systems are used to achieve a power factor of 1.0 and reduce the transmission of unused power and distortion in the distribution network. In order for these systems to function, several controller methods are used with some being specially designed to reduce electromagnetic interference (EMI). In this thesis, several common controllers such as the PI controller, hysteresis controller and a frequency-clamped critical conduction mode (FCCrM) controller are simulated using the SIMPLORER program, in addition to a newly proposed frequency-clamped continuous conduction mode (FCCCM) controller. The results of the simulations show the FCCCM controller can be used as a controller alternative with options to optimize the results based on the operating conditions.