Patents by Inventor Charles M. Stevens

Charles M. Stevens 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).

  • Motor modeling using harmonic ampere-turn saturation method
    Patent number: 6504337
    Abstract: A method and apparatus are provided for modeling an electric motor. The method includes the steps of interpolating a flux density for each angular position within an air gap of the electric motor from a predetermined air gap and tooth magnetization magnetomotive force versus air gap flux density curve, decomposing the interpolated flux density into a set of harmonic components using a fast Fourier transform and determining a flux density error function from the decomposed set of harmonic components.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: January 7, 2003
    Assignee: General Electric Company
    Inventors: Daniel M. Saban, Patrick L. Jansen, Charles M. Stevens