Title :
Digital Control for Improved Efficiency and Reduced Harmonic Distortion over Wide Load Range in Boost PFC Rectifiers
Author :
Chen, Fu-Zen ; Maksimovic, Dragan
Author_Institution :
ECE Dept., Univ. of Colorado, Boulder, CO
Abstract :
This paper addresses control techniques aimed at improving light-load efficiency and reducing harmonic distortion in digitally controlled single-phase boost power factor correction (PFC) rectifiers. Based on a discontinuous conduction mode (DCM) detection circuit, it is shown how an extension to the predictive current control law leads to improved current regulation over wide load range in both continuous conduction mode (CCM) and in DCM. Furthermore, adaptive switching and adaptive switching frequency techniques are introduced to reduce switching losses and improve efficiency at light loads. Experimental results are shown for a 300 W boost PFC rectifier.
Keywords :
adaptive control; current-mode circuits; digital control; electric current control; power factor correction; power system control; power system harmonics; predictive control; rectifying circuits; adaptive switching; control techniques; current regulation; digital control; discontinuous conduction mode detection circuit; harmonic distortion; power 300 W; predictive current control law; single phase boost power factor correction rectifiers; Current control; Digital control; Harmonic distortion; Inductors; Lighting control; Power electronics; Programmable control; Rectifiers; Switching frequency; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802747
