Patents by Inventor Mark H. Harbaugh

Mark H. Harbaugh 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).

  • Rotor position estimator for an electrical machine
    Patent number: 8159168
    Abstract: A method for estimating a rotor position in an electrical machine is provided. The method is applicable to electrical machines that have magnetic saliency. The method includes extracting the rotor position from a demodulated output signal generated in response to an injected high frequency carrier signal and determining a position error compensation based upon a demodulation delay and a velocity or rotational frequency of the electrical machine. The method also includes estimating the rotor position by applying the position error compensation to the extracted rotor position.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: April 17, 2012
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Jingbo Liu, Thomas Nondahl, Peter B. Schmidt, Semyon Royak, Mark H. Harbaugh