Flow control
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United States of America Patent
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Aug 12, 2014
Issued Date -
N/A
app pub date -
Dec 1, 2010
filing date -
Aug 26, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
Embodiments of the invention provide a pumping system for at least one aquatic application. The pumping system includes a pump, a motor coupled to the pump, and a controller in communication with the motor. The controller determines a first motor speed, obtains a reference flow rate, determines a present flow rate, and determines a present power consumption. The controller calculates a difference value between the reference flow rate and the present flow rate, and uses at least one of integral, proportional, and derivative control to generate a second motor speed based on the difference value. The controller attempts to drive the motor at the second motor speed until reaching a steady state condition.
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