Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1994-03-01
1996-11-26
Thorpe, Timothy S.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
318729, F04B 4906
Patent
active
055778909
ABSTRACT:
A pump control and protection system comprised of an analog module and a digital module. The analog module includes a synchronous phase detector, a pressure transducer and an over voltage/under voltage circuit. The synchronous phase detector determines the phase angle between a current signal supplied to a water pump and a voltage signal supplied to the pump. The output of the phase detector is directed to a programmable array logic device in the digital module and used to activate a solid state relay that controls the power supplied to the pump. The water pressure in the system is displayed on a digital display.
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