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Patent Searching and Data


Title:
POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JPH08191569
Kind Code:
A
Abstract:

PURPOSE: To prevent a power factor from decreasing by controlling the distortion of the waveform of an input current and to reduce the parts rating of a step-up chopper circuit and miniaturize a power supply.

CONSTITUTION: A power supply device is divided into a first load group 5A fed with power via a step-up chopper circuit 3 and a second load group 5B fed with power not through the step-up chopper circuit 3 and controls the current I2 of the step-up chopper circuit 3, thus approximating the waveform of an input current I1 in accordance with the sum of the load current of the first and second load groups 5A and 5B to the waveform of an input voltage.


Inventors:
AZUMA KOICHI
MAEYAMA KOICHI
Application Number:
JP99895A
Publication Date:
July 23, 1996
Filing Date:
January 09, 1995
Export Citation:
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Assignee:
FUJI XEROX CO LTD
International Classes:
H02M7/217; H02M3/155; H02M3/28; H02M7/06; H02M7/12; (IPC1-7): H02M7/06; H02M3/155; H02M3/28; H02M7/217
Attorney, Agent or Firm:
Tadao Hirata (1 outside)