Digitally controlled boost power-factor-correction converters operating in both continuous and discontinuous conduction mode
Koen De Gusseme
Van de Sype, D.M.
Van den Bossche, A.P.M.
Melkebeek, J.A.
Dept. of Electr. Energy, Ghent Univ., Belgium;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb. 2005
Volume: 52,
Issue: 1
On page(s): 88- 97
ISSN: 0278-0046
INSPEC Accession Number: 8275531
Digital Object Identifier: 10.1109/TIE.2004.841133
Current Version Published: 2005-02-07
Abstract
Whereas power-factor-correction (PFC) converters for low-power ranges (less than 250 W) are commonly designed for operation in the discontinuous conduction mode, converters for higher power levels are operated in the continuous conduction mode. Nevertheless, when these converters are operated at reduced power, discontinuous conduction mode will appear during parts of the line period, yielding input current distortion. This distortion can be eliminated by employing a dedicated control algorithm, consisting of sample correction and duty-ratio feedforward. The reduction of the harmonic distortion of the input current and the increase of the power factor are demonstrated by experiments on a 1-kW boost PFC converter.
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