System and method of constant pressure, variable speed pump control with local equalization for dissimilar pumps
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United States of America Patent
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May 15, 2012
Grant Date -
Nov 19, 2009
app pub date -
Mar 5, 2009
filing date -
Mar 5, 2008
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Abstract
A pump control system includes a plurality of different variable speed pumps. Each of the pumps can be operated at a different speed to equalize pump loads. A system wide proportional integral differential control loop increases and decreases the speed of all pump motors to maintain a desired system output pressure. A second proportional integral differential control loop associated with each pump adjusts pump speed to equalize a load profile for each respective pump.
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