Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17756
Title: New single-stage PFC regulator using the Sheppard-Taylor topology
Authors: Tse, CK 
Chow, MHL 
Keywords: Circuit topologies
Power factor correction
Switching regulators
Issue Date: 1998
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on power electronics, 1998, v. 13, no. 5, p. 842-851 How to cite?
Journal: IEEE transactions on power electronics 
Abstract: This paper describes a new usage of the dc/dc converter developed by D. I. Sheppard and B. E. Taylor in 1983 for achieving high power factor and output regulation. This converter may be viewed as a cascade of a modified boost stage and a buck stage, with the two stages sharing the same active switch. Two possible operation regimes are described. In the first regime, the converter's input part, which is a modified boost converter, operates in discontinuous mode, and the output part, which is a buck converter, operates in continuous mode. In this regime, high power factor is naturally achieved, and the output voltage is regulated by duty-cycle modulation via a simple output feedback. In the second regime, the input part operates in continuous mode, and the output part operates in discontinuous mode, with duty-cycle modulation maintaining a high power factor and frequency modulation regulating the output. Some comparisons between the Sheppard-Taylor converter and conventional boost and buck cascade are given in the paper.
URI: http://hdl.handle.net/10397/17756
ISSN: 0885-8993
EISSN: 1941-0107
DOI: 10.1109/63.712287
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