Title :
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
fDate :
6/22/1905 12:00:00 AM
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;
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
DOI :
10.1109/APEC.2000.826104
