Patents Assigned to Danfoss Low Power Drives
  • Patent number: 8801389
    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.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: August 12, 2014
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives A/S
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Peter Westermann-Rasmussen, Gert Kjaer, Florin Lungeanu
  • Publication number: 20140027359
    Abstract: A pumping system for moving water of a swimming pool includes a water pump, a variable speed motor, and a filter arrangement in fluid communication with the pump. The pumping system can also include means for determining a load value indicative of an unclogged filter that permits movement of water through the filter arrangement, means for determining a load value indicative of a clogged filter that inhibits movement of water through the filter arrangement, and means for determining a performance value of the pumping system. The pumping system also includes means for determining a relative loading value of the filter arrangement, means for displaying the relative loading value, and means for controlling the motor in response to the relative loading value. In one example, the load values and performance value can include flow pressure values. A method of moving water of a swimming pool is also disclosed.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 30, 2014
    Applicants: Danfoss Low Power Drives, Pentair Water Pool and Spa, Inc.
    Inventors: Robert W. Stiles, JR., Lars Hoffmann Berthelsen, Ronald B. Robol, Gert Kjaer, Einar Kjartan Runarsson
  • Patent number: 8602745
    Abstract: Embodiments of the invention provide a system including a pump, a motor, and a controller. The controller establishes a baseline value of power consumption during a deadhead condition, increases a counter when a current value decreases below the baseline value, and determines a deadhead condition when the counter exceeds a limit. The controller also compares a current value to an immediately previous power consumption value to determine an entrapment condition indicated by a sudden decrease in power consumption.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: December 10, 2013
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Peter Westermann-Rasmussen, Gert Kjaer, Florin Lungeanu
  • Patent number: 8602743
    Abstract: Embodiments of the invention provide a method of operating a safety vacuum release system (SVRS) with a controller for a pump including a motor. The method can include measuring an actual power consumption of the motor necessary to pump water and overcome losses. The method can include triggering the SVRS when a dynamic suction blockage is identified in order to shut down the pump substantially immediately. The SVRS can also be triggered when a dead head condition is identified based on the actual power consumption.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: December 10, 2013
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen
  • Patent number: 8573952
    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 an actual power consumption of the motor and compares the actual power consumption to a reference power consumption. The controller also determines that the pump is in an unprimed condition if the actual power consumption is less than the reference power consumption and that the pump is in a primed condition if the actual power consumption is at least equal to the reference power consumption.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: November 5, 2013
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Gert Kjaer, Florin Lungeanu
  • Patent number: 8564233
    Abstract: Embodiments of the invention provide a variable frequency drive system and a method of controlling a pump driven by a motor with the pump in fluid communication with a fluid system. The drive system and method can provide one or more of the following: a sleep mode, pipe break detection, a line fill mode, an automatic start mode, dry run protection, an electromagnetic interference filter compatible with a ground fault circuit interrupter, two-wire and three-wire and three-phase motor compatibility, a simple start-up process, automatic password protection, a pump out mode, digital input/output terminals, and removable input and output power terminal blocks.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: October 22, 2013
    Assignees: Sta-Rite Industries, LLC, Danfoss Low Power Drives
    Inventors: Melissa Drechsel Kidd, William James Genaw, Micheal Robert Pasche, Gary Thomas Baase, II, Lars Hoffmann Berthelsen, Rasmus Fink, Martin Skov Holm
  • Patent number: 8500413
    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: March 29, 2010
    Date of Patent: August 6, 2013
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives A/S
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Einar Kjartan Runarsson
  • Patent number: 8480373
    Abstract: A pumping system for moving water of a swimming pool includes a water pump, a variable speed motor, and a filter arrangement in fluid communication with the pump. The pumping system can also include means for determining a load value indicative of an unclogged filter that permits movement of water through the filter arrangement, means for determining a load value indicative of a clogged filter that inhibits movement of water through the filter arrangement, and means for determining a performance value of the pumping system. The pumping system also includes means for determining a relative loading value of the filter arrangement, means for displaying the relative loading value, and means for controlling the motor in response to the relative loading value. In one example, the load values and performance value can include flow pressure values. A method of moving water of a swimming pool is also disclosed.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: July 9, 2013
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Gert Kjaer, Einar Kjartan Runarsson
  • Patent number: 8469675
    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 an actual power consumption of the motor and compares the actual power consumption to a reference power consumption. The controller also determines that the pump is in an unprimed condition if the actual power consumption is less than the reference power consumption and that the pump is in a primed condition if the actual power consumption is at least equal to the reference power consumption.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: June 25, 2013
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Gert Kjaer, Florin Lungeanu
  • Patent number: 8436559
    Abstract: Embodiments of the invention provide a variable frequency drive system and a method of controlling a pump driven by a motor with the pump in fluid communication with a fluid system. The drive system and method can provide one or more of the following: a sleep mode, pipe break detection, a line fill mode, an automatic start mode, dry run protection, an electromagnetic interference filter compatible with a ground fault circuit interrupter, two-wire and three-wire and three-phase motor compatibility, a simple start-up process, automatic password protection, a pump out mode, digital input/output terminals, and removable input and output power terminal blocks.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: May 7, 2013
    Assignees: Sta-Rite Industries, LLC, Danfoss Low Power Drives
    Inventors: Melissa Drechsel Kidd, William James Genaw, Micheal Robert Pasche, Gary Thomas Baase, II, Lars Hoffmann Berthelsen, Rasmus Fink, Martin Skov Holm
  • Patent number: 8313306
    Abstract: Embodiments of the invention provide a method of operating a safety vacuum release system (SVRS) with a controller for a pump including a motor. The method can include measuring an actual power consumption of the motor necessary to pump water and overcome losses. The method can include triggering the SVRS when a dynamic suction blockage is identified in order to shut down the pump substantially immediately. The SVRS can also be triggered when a dead head condition is identified based on the actual power consumption.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: November 20, 2012
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen
  • Patent number: 8043070
    Abstract: A pumping system for moving water of a swimming pool includes a water pump, an infinitely variable speed motor, and an arrangement for operating the motor. In one example, the pumping system includes a memory configured to store a plurality of retained speed values, an arrangement for providing a plurality of retained speed values to the memory, and an arrangement for reading a selected one of the plurality of retained speed values from the memory. In addition or alternatively, the pumping system includes a storage medium for digitally storing a plurality of pre-established motor speed values and an arrangement for receiving input from a user to select one of the pre-established motor speeds. In addition or alternatively, the pumping system further includes an arrangement for restarting operation of the motor at a previously selected speed value when power supplied to the motor is interrupted during operation of the motor. A method for controlling the pumping system is also provided.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: October 25, 2011
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives, a Division of Danfoss
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Daniel J. Hruby, Kevin Murphy, Einar Kjartan Runarsson, Arne Fink Hansen, Florin Lungeanu, Peter Westermann-Rasmussen
  • Patent number: 7854597
    Abstract: A pumping system for moving water of a swimming pool includes a water pump, a variable speed motor, and an arrangement for controlling the variable speed motor. The pumping system further includes an auxiliary device operably connected to the arrangement for controlling, and an arrangement for providing two-way communication between the arrangement for controlling and the auxiliary device. The arrangement for controlling is capable of receiving a parameter from the auxiliary device through the arrangement for providing two-way communication. In one example, the arrangement for controlling is capable of independently controlling the variable speed motor without receipt of a parameter from the auxiliary device. In addition or alternatively, the arrangement for controlling is operable to selectively alter operation of the motor based upon the parameter.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: December 21, 2010
    Assignees: Pentair Water Pool and Spa, Inc., Danfoss Low Power Drives
    Inventors: Robert W. Stiles, Jr., Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Daniel J. Hruby, Kevin Murphy, Edward Brown, David MacCallum, Dennis Dunn, Kenneth N. Clack, Einar Kjartan Runarsson, Alberto Morando
  • 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