Patents by Inventor John Milton Bailey

John Milton Bailey 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).

  • Constant power speed range extension of surface mounted PM motors
    Patent number: 6236179
    Abstract: A circuit and method for controlling a rotating machine (11) in the constant horsepower range above base speed uses an inverter (15) having SCR's (T1-T6) connected in series with the primary commutation switches (Q1-Q6) to control turn off of the primary commutation switches and to protect the primary commutation switches from faults. The primary commutation switches (Q1-Q6) are controlled by a controller (14), to fire in advance or after a time when the back emf equals the applied voltage, and then to turn off after a precise dwell time, such that suitable power is developed at speeds up to at least six times base speed.
    Type: Grant
    Filed: February 21, 2000
    Date of Patent: May 22, 2001
    Assignee: Lockheed Martin Energy Research Corporation
    Inventors: Jack Steward Lawler, John Milton Bailey