Patents by Inventor Donald Stupeck

Donald Stupeck 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).

  • Disk drive spindle motor start up using an additional motor winding upon startup failure
    Patent number: 5650886
    Abstract: A disk drive system for use in limited power applications is disclosed. The disk drive includes a spindle motor having two or more windings, along with a spindle motor driver which can drive the spindle motor in any of a unipolar, bipolar or tripolar mode. The bipolar or tripolar mode is used to start the disk drive and then the unipolar mode is used to operate the disk drive while data is being retrieved. By combining the three drive modes a large start current reduction and higher rotation velocities are achieved. Current consumption is further minimized by adaptively transitioning from bipolar to unipolar modes of operation. The disclosure also includes a general methodology for optimal motor K.sub.E and K.sub.M parameter selection.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: July 22, 1997
    Assignee: Western Digital Corporation
    Inventors: Raffi Codilian, Donald Stupeck
  • Disk drive employing multi-mode spindle drive system
    Patent number: 5471353
    Abstract: A disk drive system for use in limited power applications is disclosed. The disk drive includes a spindle motor having two or more windings, along with a spindle motor driver which can drive the spindle motor in any of a unipolar, bipolar or tripolar mode. The bipolar or tripolar mode is used to start the disk drive and then the unipolar mode is used to operate the disk drive while data is being retrieved. By combining the three drive modes a large start current reduction and higher rotation velocities are achieved. Current consumption is further minimized by adaptively transitioning from bipolar to unipolar modes of operation. The disclosure also includes a general methodology for optimal motor K.sub.E and K.sub.M parameter selection.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: November 28, 1995
    Assignee: Western Digital (Sea), Pte., Ltd.
    Inventors: Raffi Codilian, Donald Stupeck