Patents by Inventor Philip L. Lloyd-Davies

Philip L. Lloyd-Davies 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).

  • Current sensing method and apparatus for a multi-phase brushless DC motor
    Patent number: 5142208
    Abstract: Method and apparatus for monitoring bi-directional currents in a multi-phase brushless DC motor. The current in each separate phase is separately monitored to generate a feedback signal that is used to dynamically adjust the instantaneous levels of the winding currents in accordance with a specified torque required of the motor. Both negative and positive currents in the motor windings are monitored at all times to provide precision control of the feedback signals.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: August 25, 1992
    Assignee: Storage Technology Corporation
    Inventors: Kevin S. Curran, James C. Faulk, Philip L. Lloyd-Davies, Steven G. Trabert