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Patent Searching and Data


Title:
POWER SUPPLY UNIT
Document Type and Number:
Japanese Patent JP2008099470
Kind Code:
A
Abstract:

To provide a power supply unit that dispenses with the cost of wiring for the power supply and does not place constraint on the utilization environment of a field apparatus, and that can reduce the maintenance cost.

An air line 5, for supplying compressed air for driving a valve installed in a plant, is connected to a power generating device 3. The power generating device 3 uses the difference between the pressure of the compressed air and the atmospheric pressure to generate power. The power generating device 3 is used as a supply source for the accumulation of electricity to a battery 2, or as a power source for a radio sensor 1. The battery 2 is also used as the power source for the radio sensor 1.


Inventors:
KANO TOSHIYUKI
IAI TOSHIYUKI
Application Number:
JP2006279773A
Publication Date:
April 24, 2008
Filing Date:
October 13, 2006
Export Citation:
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Assignee:
YOKOGAWA ELECTRIC CORP
International Classes:
H02K35/06
Domestic Patent References:
JPH01295684A1989-11-29
JPH08314549A1996-11-29
JP2001200779A2001-07-27
JP2003057098A2003-02-26
JP2003134261A2003-05-09
JP2000345811A2000-12-12
JPH11270305A1999-10-05
JPH1037717A1998-02-10
Foreign References:
WO2005116787A12005-12-08