Automatic pump control system with variable test cycle initiation frequency
First Claim
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1. A pump control system for adjusting the frequency of operation of a pump motor in accordance with the demand on the pump, said pump control system comprising:
- means for periodically actuating the pump motor to initiate operation of the pump at periodic intervals;
sensor means for sensing the condition of the operating pump motor; and
means, responsive to said sensor means, for adjusting said periodic interval to conform the operation of the pump motor to the demand on the pump, said means for adjusting including means for counting the number of times that liquid is present and the number of times liquid absent.
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Abstract
A pump control system for adjusting the frequency of operation of a pump motor in accordance with the demand on the pump includes means for periodically actuating the pump motor to initiate operation of the pump at periodic intervals; sensor means for sensing the condition of the operating pump motor; and means responsive to the sensor means for adjusting the periodic interval to conform the operation of the pump motor to demand on the pump.
112 Citations
14 Claims
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1. A pump control system for adjusting the frequency of operation of a pump motor in accordance with the demand on the pump, said pump control system comprising:
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means for periodically actuating the pump motor to initiate operation of the pump at periodic intervals; sensor means for sensing the condition of the operating pump motor; and means, responsive to said sensor means, for adjusting said periodic interval to conform the operation of the pump motor to the demand on the pump, said means for adjusting including means for counting the number of times that liquid is present and the number of times liquid absent. - View Dependent Claims (2, 3, 4, 5)
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6. A pump control system for adjusting the frequency of initiation of the test cycle of a pump motor in accordance with demand on the pump comprising:
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switching means for supplying power to the pump motor; a periodic test cycle generator for periodically actuating said switching means to initiate operation of the pump motor at periodic intervals; sensor means for sensing the current drawn by the pump motor; a reference circuit; liquid detector means responsive to said reference circuit and said sensor means for detecting whether liquid is present or absent; and monitoring means, responsive to said liquid detector means, for adjusting said periodic interval to conform the operation of the pump motor to the demand on the pump, said monitoring means including means for counting the number of times that liquid is present and the number of times that liquid is absent. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification