Analysis and design of an isolated single-stage converter achievingpower-factor correction and fast regulation
Tsai-Fu Wu
Yu-Kai Chen
Dept. of Electr. Eng., Nat. Chung Cheng Univ.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug 1999
Volume: 46,
Issue: 4
On page(s): 759-767
ISSN: 0278-0046
References Cited: 23
CODEN: ITIED6
INSPEC Accession Number: 6348047
Digital Object Identifier: 10.1109/41.778230
Current Version Published: 2002-08-06
Abstract
This paper presents the analysis and design of an isolated
single-stage converter achieving high-power-factor correction and fast
regulation. By using the technique suggested by Wu et al., a buck-boost
converter and a flyback converter can be integrated to form the
discussed converter. The buck-boost semistage working in the
discontinuous conduction mode (DCM) functions as a power-factor
corrector, and the flyback semistage operating in the DCM is a voltage
regulator which is controlled, theoretically, to be independent of load
variation. An approximated small-signal model of the converter operating
in the DCM is developed. Design of a peak-current feedback loop with an
optimal proportional integral controller is also presented. A prototype
is implemented to verify that the analysis and design are effective and
feasible
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