Patents by Inventor Richard Cooper, Jr.

Richard Cooper, Jr. 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).

  • Controlled post-synchronizing on brushless synchronous motors
    Patent number: 4038589
    Abstract: A static control system for applying excitation to synchronous motors, especially of the brushless type, by firing a semiconductor switch to apply direct current excitation to the field of the motor. A post-synchronization firing circuit is provided for firing the switch in response to the voltage across the switch if the motor pulls into synchronism before the switch is fired. A control circuit is provided for inhibiting the operation of the post-synchronizing firing circuit during subsynchronous operation.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: July 26, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: Carl J. Heyne, Richard Cooper, Jr., Gurney L. Godwin