Patents by Inventor Roy Caddy

Roy Caddy 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).

  • Motor control system
    Patent number: 4479082
    Abstract: A motor control system in which an actual torque indication is derived from the motor and compared with a reference, or demand, torque. From the difference signal is derived a stator M.M.F. in magnitude and position relative to a reference frame locked to the rotor. Orthogonal components of this stator M.M.F. are derived and transformed to stator phase winding drive signals.
    Type: Grant
    Filed: August 3, 1982
    Date of Patent: October 23, 1984
    Assignee: The General Electric Company p.l.c.
    Inventors: Colin D. Schauder, Roy Caddy