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Patent Searching and Data


Title:
POWER SUPPLY SYSTEM AND AIR CONDITIONER HAVING THE SAME
Document Type and Number:
Japanese Patent JP2008263694
Kind Code:
A
Abstract:

To enlarge a conduction angle of input current by simple control, to improve a power factor and to obtain large output.

A power supply system is provided with rectifying circuits 3a to 3d, a reactor 2, a first switching means 8 and a second switching means 9, which connect/disconnect a current route, a power factor improvement capacitor 5 connected between AC input terminals and DC output terminals of the rectifying circuits, a phase improvement capacitor 6 connected between the AC input terminals of the rectifying circuits, a smoothing capacitor 4 smoothing output voltage of the rectifying circuits and obtaining almost DC voltage, an AC voltage detecting means 32 detecting a voltage value of an AC power supply 1 and a switch control means 30 controlling the first and second switching means. The switch control means 30 outputs a pulse signal on receiving a first voltage value detected by the AC voltage detecting means 32, turns on the first switching means 8 on receiving a second voltage value, turns on the second switching means 9 on receiving a third voltage value, turns off the first switching means on receiving a fourth voltage value, and turns off the second switching means.


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Inventors:
OKUI HIROSHI
GOTO EIJI
Application Number:
JP2007103642A
Publication Date:
October 30, 2008
Filing Date:
April 11, 2007
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H02M7/12; F24F11/02; F25B49/00
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano