Patents by Inventor Stephen J. Watkins

Stephen J. Watkins 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).

  • Angle firing controller and method of controlling a switched reluctance machine
    Patent number: 5789893
    Abstract: An electric motor controller is disclosed that controls the torque of a switched reluctance motor with an angle controller that eliminates the need for a look-up table. In one example, the electric motor controller includes an angle controller that employs edge-triggered monostables to generate a single pulse firing signal which is synchronized with rotor position and whose pulse length varies with torque demand. An angle firing circuit utilizing freewheeling is also disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 4, 1998
    Assignee: Switched Reluctance Drives, Ltd.
    Inventor: Stephen J. Watkins