Patents by Inventor Christopher E. Mann

Christopher E. 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).

  • Patent number: 5327053
    Abstract: An apparatus and process for detecting rotor position for improved motor start-up. The apparatus detects a target equilibrium position of the rotor using a fixed gain amplifier, window comparator and slope detector circuitry. The window comparator circuitry qualifies the peaks of the back EMF signal. Slope detector circuitry pinpoints the peak of the back EMF signal qualified by the window comparator. The technique utilizes the steps of energizing the phase windings of said motor, detecting the target equilibrium position, and then accelerating the motor through a commutation process.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: July 5, 1994
    Assignee: Seagate Technology, Inc.
    Inventors: Christopher E. Mann, Robert P. Cloutier, Michael W. Null