Title :
Digital Control for Improved Efficiency and Reduced Harmonic Distortion Over Wide Load Range in Boost PFC Rectifiers
Author :
Fu-Zen Chen;Dragan Maksimović
Author_Institution :
Department of Electrical and Computer Engineering, Colorado Power Electronics Center, University of Colorado, Boulder, USA
Abstract :
This paper focuses on efficiency improvements and harmonic distortion reductions in digitally controlled single-phase boost power-factor-correction (PFC) rectifiers operating over wide load range. Based on a discontinuous conduction mode (DCM) detection circuit, a predictive current control law is modified to improve current shaping in both DCM and continuous conduction mode (CCM). Adaptive switching and adaptive frequency control 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 :
"Digital control","Harmonic distortion","Rectifiers","Adaptive control","Power factor correction","Circuits","Current control","Programmable control","Automatic frequency control","Switching loss"
Journal_Title :
IEEE Transactions on Power Electronics
DOI :
10.1109/TPEL.2010.2050702
