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Digital Control for Improved Efficiency and Reduced Harmonic Distortion Over Wide Load Range in Boost PFC Rectifiers

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2 Author(s)
Fu-Zen Chen ; Dept. of Electr. & Comput. Eng., Univ. of Colorado, Boulder, CO, USA ; Maksimović, D.

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.

Published in:

Power Electronics, IEEE Transactions on  (Volume:25 ,  Issue: 10 )

Date of Publication:

Oct. 2010

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