A step-down converter with low ripple input current for power factor correction

Author

Grigore, V. ; Kyyra, J.

Author_Institution

Inst. of Intelligent Power Electron., Helsinki Univ. of Technol., Espoo, Finland

Volume

1

fYear

2000

fDate

6/22/1905 12:00:00 AM

Firstpage

188

Abstract

Step-down converters can be used to achieve power factor correction when a low output voltage is desired. The paper analyzes a nonisolated, two-inductor, step-down power converter and presents its application to power factor correction, when operating in the continuous conduction mode with average current mode control. The input current of the converter is continuous, since one of the inductors is on the line side. Moreover, for a proper coupling of the two inductors, the ripple of the input current can be significantly reduced. Thus, a PFC preregulator with low output voltage and low-ripple input current is obtained. The paper also presents experimental results for a 48 VDC output-voltage and 200 W output-power power factor correction preregulator, operating with 230 VRMS input voltage

Keywords

AC-DC power convertors; harmonic distortion; power conversion harmonics; power factor correction; rectifying circuits; PFC preregulator; average current mode control; continuous conduction mode; input current ripple; power factor correction; step-down AC/DC power converter; Buck converters; IEC standards; Inductors; Low voltage; Power electronics; Power factor correction; Power harmonic filters; Surge protection; Switching converters; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-5864-3

Type

conf

DOI

10.1109/APEC.2000.826104

Filename

826104