Title :
A high-power-factor buck converter
Author :
Endo, Hisahito ; Yamashita, Takashi ; Sugiura, Toshiyuki
Author_Institution :
NTT Interdisciplinary Res. Lab., Tokyo, Japan
fDate :
June 29 1992-July 3 1992
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;
Conference_Titel :
Power Electronics Specialists Conference, 1992. PESC '92 Record., 23rd Annual IEEE
Conference_Location :
Toledo, Spain
Print_ISBN :
0-7803-0695-3
DOI :
10.1109/PESC.1992.254766
