Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1998-04-20
1999-06-22
Gaffin, Jeffrey
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361170, H01H 4700
Patent
active
059148470
ABSTRACT:
A battery powered irrigation valve controller designed to conserve the life of both the low voltage battery source which operates the microprocessor circuitry as well as the high voltage battery source which operates the external valve solenoids. Energy leakage from the high voltage battery source is prevented by maintaining the primary capacitor in a discharged state and delaying the charging of this capacitor until just before it is to be discharged to the valve solenoid. Unnecessary depletion of the high voltage battery source is also accomplished by isolating this source from the primary capacitor immediately prior to discharge, thereby avoiding a draw of energy from the high voltage battery source itself during discharge. The low voltage battery source which powers the computer circuitry is conserved through the action of the microprocessor which does not run in a continuous current consuming mode, but which remains dormant except for periodic sampling.
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Alexanian George
Carlson Eugene S
Gaffin Jeffrey
Huynh Kim
Miller Mark D.
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