Patents by Inventor Hans M. Leuthold

Hans M. Leuthold 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).

  • Phase commutation circuit for brushless DC motors using a spike insensitive back EMF detection method
    Patent number: 5057753
    Abstract: Apparatus for controlling phase commutation of a brushless DC motor. The apparatus is comprised of a back EMF detection technique to determine the current position of the rotor, an error rejection circuit to prohibit commutation noise from causing errors in determining the present rotor position, a means for determining the next phase set to energize and proper energization timing to maintain a lead angle between the physical rotor position and the magnetic wave, and a means for driving the appropriate brushless DC motor phases with current.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: October 15, 1991
    Assignee: Seagate Technology, Inc.
    Inventors: Hans M. Leuthold, Felix De Herrera