Patents by Inventor Robert Ehmsen

Robert Ehmsen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for starting a single-phase induction motor
    Patent number: 11563389
    Abstract: The invention relates to a method (19) for starting an electric single-phase induction motor (1), wherein during a start-up interval of the start-up cycle for starting said electric motor (1), the frequency (fref) of the electric current for driving said electric motor (1) is set to a first frequency (fstart), and later to the operating frequency (frun) of the electric motor (1), wherein the first frequency (fstart) is higher than the operating frequency (frun).
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: January 24, 2023
    Assignees: Danfoss Customised Power Electronics, Sta-Rite Industries Inc.
    Inventors: Torben Damsgaard, Robert Ehmsen, Florin Lungeanu, Rasmus Fink, Lars Berthelsen, Melissa Drechsel Kidd, William James Genaw, Micheal Robert Pasche, Gary Thomas Baase, II
  • METHOD FOR STARTING A SINGLE-PHASE INDUCTION MOTOR
    Publication number: 20120025748
    Abstract: The invention relates to a method (19) for starting an electric single-phase induction motor (1), wherein during a start-up interval of the start-up cycle for starting said electric motor (1), the frequency (fref) of the electric current for driving said electric motor (1) is set to a first frequency (fstart), and later to the operating frequency (frun) of the electric motor (1), wherein the first frequency (fstart) is higher than the operating frequency (frun).
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Applicants: Pentair Inc., Danfoss Customised Power Electronics A/S
    Inventors: Torben Damsgaard, Robert Ehmsen, Florin Lungeanu, Rasmus Fink, Lars Berthelsen, Melissa Drechsel Kidd, William James Genaw, Micheal Robert Pasche, Gary Thomas Baase, II