Patents Assigned to Danfoss Low Power Drives, a division of Danfoss Drive A/S
  • Patent number: 7686589
    Abstract: The present invention provides a pumping system for moving water of a swimming pool, including a water pump and a variable speed motor. In one example, a target volume amount of water and an operational time period is provided, and the operational time period is altered based upon a volume of water moved. In another example, operation of the motor is altered based upon the volume of water moved. In addition or alternatively, a target flow rate of water to be moved by the water pump is determined based upon the target volume amount and a time period. In addition or alternatively, a plurality of operations are performed on the water, and a total volume of water moved by the pump is determined. In addition or alternatively, an optimized flow rate value is determined based upon power consumption.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: March 30, 2010
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, division of Danfoss Drives A/S
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Einar Kjartan Runarsson
  • Publication number: 20070154320
    Abstract: A pumping system for moving water of a swimming pool includes a water pump and a variable speed motor. The pumping system further includes means for determining a first motor speed of the motor, means for determining first and second performance values of the pumping system, and means for comparing the first and second performance values. The pumping system further includes means for determining an adjustment value based upon the comparison, means for determining a second motor speed based upon the adjustment value, and means for controlling the motor in response to the second motor speed. In one example, the pumping system includes means for determining a value indicative of a flow rate of water moved by the pump. In addition or alternatively, the pumping system includes a filter arrangement. A method of controlling the pumping system for moving the water of the swimming pool is also disclosed.
    Type: Application
    Filed: December 11, 2006
    Publication date: July 5, 2007
    Applicants: PENTAIR WATER POOL AND SPA, INC., Danfoss Low Power Drives, a division of Danfoss Drives A/S
    Inventors: Robert Stiles, Lars Berthelsen, Peter Westermann-Rasmussen, Gert Kjaer, Florin Lungeanu
  • Publication number: 20070114162
    Abstract: 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.
    Type: Application
    Filed: November 23, 2005
    Publication date: May 24, 2007
    Applicants: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, a division of Danfoss Drive A/S
    Inventors: Robert Stiles, Lars Berthelsen, Ronald Robol, Christopher Yahnker, Everett Cox, Donald Steen, Kevin Murphy, Walter Woodcock, Daniel Hruby, Peter Westermann-Rasmussen, Gert Kjaer, Einar Runarsson, Arne Hansen, Alberto Morando, Florin Lungeanu, Nils-Ole Harvest
  • Patent number: D567189
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: April 22, 2008
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, a division of Danfoss Drive A/S
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Gert Kjaer, Arne Fink Hansen
  • Patent number: D568340
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: May 6, 2008
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, a division of Danfoss Drive A/S
    Inventors: Robert W Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B Robol, Christopher R Yahnker, John Gary Bulluck, Gert Kjaer, Arne Fink Hansen
  • Patent number: D611430
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: March 9, 2010
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, a division of Danfoss Drives A/S
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Gert Kjaer, Arne Fink Hansen
  • Patent number: D618182
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: June 22, 2010
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, a division of Danfoss Drives A/S
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Gert Kjaer, Arne Fink Hansen