Patents by Inventor Lawrence I. Donley

Lawrence I. Donley 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).

  • Control for stabilizing the alignment position of the rotor of a synchronous motor
    Patent number: 4731571
    Abstract: A method and apparatus for damping oscillations in the rotor load angle of a synchronous motor to provide stable rotational alignment in high precision applications. The damping method includes sensing the angular position of the rotor and utilizing the position signal to generate an error signal in response to changes in the period of rotation of the rotor. The error signal is coupled to phase shift amplifiers which shift the phase of the motor drive signal in a direction to damp out the oscillations in the rotor load angle.
    Type: Grant
    Filed: March 12, 1985
    Date of Patent: March 15, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Lawrence I. Donley