A high-power-factor buck converter

Author

Endo, Hisahito ; Yamashita, Takashi ; Sugiura, Toshiyuki

Author_Institution

NTT Interdisciplinary Res. Lab., Tokyo, Japan

fYear

1992

fDate

June 29 1992-July 3 1992

Firstpage

1071

Abstract

A high-power-factor buck converter is proposed. The converter is composed of rectifier diodes, a small input capacitor, and a buck converter. It supplies low output voltages and uses low voltage semiconductor devices and ceramic capacitors. Two operation modes exist in the converter: discontinuous and continuous inductor current modes. Analysis and experimentation show that the converter´s power factor is over 0.9 in discontinuous mode by constant duty ratio operation. It is clarified that the power factor decreases to about 0.7 in continuous mode by constant duty ratio operation, and it can be improved to over 0.9 by a new input current control system.<>

Keywords

power convertors; power factor; continuous inductor current; discontinuous inductor current; high-power-factor buck converter; input current control system; low output voltages; low voltage semiconductor devices and ceramic capacitors; rectifier diodes; small input capacitor; Buck converters; Capacitors; Ceramics; Current control; Inductors; Low voltage; Reactive power; Rectifiers; Semiconductor devices; Semiconductor diodes;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1992. PESC '92 Record., 23rd Annual IEEE

Conference_Location

Toledo, Spain

Print_ISBN

0-7803-0695-3

Type

conf

DOI

10.1109/PESC.1992.254766

Filename

254766