Patents by Inventor Raymond Mann

Raymond Mann 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).

  • Apparatus and method for controlling an electric machine
    Patent number: 6498447
    Abstract: A controller for an electronically commutated electrical machine receives a feedback signal indicative of a parameter which it is desired to minimize, e.g. torque ripple, current, voltage, vibration or acoustic noise. The controller computes the amplitude and phase of a set of harmonics in the parameter and sequentially injects harmonics of the correct amplitude and phase to minimize the parameter. An optimizing routine iterates through the set of harmonics to further reduce the parameter.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: December 24, 2002
    Assignee: Switched Reluctance Drives, Ltd.
    Inventors: Raymond Mann, Austin Hughes, John Michael Stephenson
  • Apparatus and method for controlling an electric machine
    Publication number: 20020041168
    Abstract: A controller for an electronically commutated electrical machine receives a feedback signal indicative of a parameter which it is desired to minimize, e.g. torque ripple, current, voltage, vibration or acoustic noise. The controller computes the amplitude and phase of a set of harmonics in the parameter and sequentially injects harmonics of the correct amplitude and phase to minimize the parameter. An optimizing routine iterates through the set of harmonics to further reduce the parameter.
    Type: Application
    Filed: August 16, 2001
    Publication date: April 11, 2002
    Applicant: SWITCHED RELUCTANCE DRIVES LIMITED
    Inventors: Raymond Mann, Austin Hughes, John Michael Stephenson