Flyback-forward power factor correction circuit with line-frequency ripple suppression

Author

Liang, T.J. ; Ai, T.-H. ; Chen, J.F.

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

149

Issue

6

fYear

2002

fDate

11/1/2002 12:00:00 AM

Firstpage

474

Lastpage

480

Abstract

A flyback-forward converter with power factor correction and line ripple suppression is proposed. The topology combines forward and flyback circuits with a post regulator. To maintain a high power factor, the flyback circuit delivers the major output power, while the output voltage is controlled by the post regulator with fast response to suppress line-frequency ripple without the use of a high voltage bulk capacitor or current sensor on the primary side. The circuit features high power factor and low output line-frequency ripple in discontinuous conduction mode. A theoretical analysis and experimental results are presented.

Keywords

AC-DC power convertors; power control; power factor correction; voltage control; 100 kHz; 110 V; 15 V; 18 V; 2 A; 60 Hz; AC/DC converters; current sensor; discontinuous conduction mode; fast response; flyback circuit delivers; flyback circuits; flyback-forward power factor correction circuit; forward circuits; high power factor; high voltage bulk capacitor; line-frequency ripple suppression; major output power control; output voltage control; post regulator; total harmonic distortion;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20020524

Filename

1176561