Patents by Inventor Kenneth C. Ward

Kenneth C. Ward 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).

  • Method and means for stable operation of a synchronous motor
    Patent number: 4455520
    Abstract: Stability in operating a synchronous stepping motor in mid-frequency is achieved by monitoring instantaneous power to the motor and adjusting the phase of the motor drive waveform as needed to maintain uniform speed. In an embodiment in which a pulse width modulator responds to a reference signal waveform, the phase of the reference signal waveform is varied to adjust the instantaneous power delivered to the motor.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: June 19, 1984
    Assignee: Compumotor Corporation
    Inventors: Kenneth C. Ward, Ross Welburn