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.
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Inventors:
KANO TOSHIYUKI
IAI TOSHIYUKI
IAI TOSHIYUKI
Application Number:
JP2006279773A
Publication Date:
April 24, 2008
Filing Date:
October 13, 2006
Export Citation:
Assignee:
YOKOGAWA ELECTRIC CORP
International Classes:
H02K35/06
Domestic Patent References:
JPH01295684A | 1989-11-29 | |||
JPH08314549A | 1996-11-29 | |||
JP2001200779A | 2001-07-27 | |||
JP2003057098A | 2003-02-26 | |||
JP2003134261A | 2003-05-09 | |||
JP2000345811A | 2000-12-12 | |||
JPH11270305A | 1999-10-05 | |||
JPH1037717A | 1998-02-10 |
Foreign References:
WO2005116787A1 | 2005-12-08 |