09404500 is referenced by 4 patents and cites 975 patents.

A pumping system includes a pump for moving water. In one aspect, this is in connection with performance of an operation. The system includes a variable speed motor operatively connected to drive the pump. A value indicative of flow rate of water is determined and the motor is controlled to adjust the flow rate indicative value toward a constant. A value indicative of flow pressure is determined and the motor is controlled to adjust the flow pressure indicative value toward a constant. A selection is made between flow rate control and flow pressure control. In another aspect, the pump is controlled to perform a first operation, and is operated to perform a second water operation. Control of operation of the pump to perform the first water operation is altered in response to operation of the pump to perform the second operation.

Title
Control algorithm of variable speed pumping system
Application Number
13/230678
Publication Number
9404500 (B2)
Application Date
September 12, 2011
Publication Date
August 2, 2016
Inventor
Gert Kjaer
Soenderborg
DK
Peter Westermann Rasmussen
Soenderborg
DK
Daniel J Hruby
Sanford
NC, US
Kevin Murphy
Quartz Hill
CA, US
Donald Steen
Sanford
NC, US
Everett Cox
Sanford
NC, US
Nils Ole Harvest
Nordborg
DK
Lars Hoffmann Berthelsen
Kolding
DK
Ronald B Robol
Sanford
NC, US
Robert W Stiles Jr
Cary
NC, US
Agent
Quarles & Brady
Assignee
Pentair Water Pool and
NC, US
IPC
F04D 15/00
C02F 1/00
F04B 43/12
F04B 49/06
F04B 49/00
G05D 7/00
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