Patents by Inventor Keith Hoemann

Keith Hoemann 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).

  • Interior Magnet Machine With Non-Perpendicular Slots
    Publication number: 20070252467
    Abstract: An interior permanent magnet machine having angled slots.
    Type: Application
    Filed: April 14, 2006
    Publication date: November 1, 2007
    Applicant: Emerson Electric Co.,
    Inventors: Keith Hoemann, Todd Walls
  • Reduced coil segmented stator
    Publication number: 20050258706
    Abstract: A brushless permanent magnet (BPM) electric machine including a segmented stator having interconnected stator segment assemblies defining M stator teeth. Each of said M stator teeth having substantially the same axially facing size and shape. N coil windings are individually wound about the stator teeth. N<M.
    Type: Application
    Filed: May 19, 2004
    Publication date: November 24, 2005
    Inventors: Gary Horst, Keith Hoemann
  • Induction motor control system
    Patent number: 6636011
    Abstract: An induction motor control system senses the zero-cross angle of a current waveform applied to the motor's phase windings and computes the difference between the sensed current zero-cross angle and a predetermined demand voltage angle to estimate a power factor angle. The estimated power factor angle is compared to a predetermined desired power factor angle, and the voltage applied to the phase windings is adjusted in response to the difference between the estimated power factor angle and the desired power factor angle.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: October 21, 2003
    Assignee: Emerson Electric Co.
    Inventors: Vinodkumar Sadasivam, Keith Hoemann, Bret Clark