Patents by Inventor Aaron Luther Thomas

Aaron Luther Thomas 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).

  • FPDA closed loop electric drives controls
    Patent number: 8773056
    Abstract: A control system for a switched reluctance (SR) machine is provided. The control system may include a converter circuit that is operatively coupled to the SR machine, and a controller in communication with the converter circuit. The controller may be configured to execute two or more processes in parallel, wherein the processes include generating a torque command based on one or more of bus voltage, machine current, rotor speed and rotor position, determining a first set of current control parameters based on the torque command and the rotor speed, determining a second set of current control parameters based on one or more of the torque command, the rotor speed and the rotor position, selecting one of the first and second sets of current control parameters based on the rotor speed, and operating the gates according to the selected set of current control parameters.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: July 8, 2014
    Assignee: Caterpillar Inc.
    Inventors: Jesse Gerdes, James Siegle, Mark Hartman, Aaron Luther Thomas, Jackson Wai
  • FPDA Closed Loop Electric Drives Controls
    Publication number: 20130328517
    Abstract: A control system for a switched reluctance (SR) machine is provided. The control system may include a converter circuit that is operatively coupled to the SR machine, and a controller in communication with the converter circuit. The controller may be configured to execute two or more processes in parallel, wherein the processes include generating a torque command based on one or more of bus voltage, machine current, rotor speed and rotor position, determining a first set of current control parameters based on the torque command and the rotor speed, determining a second set of current control parameters based on one or more of the torque command, the rotor speed and the rotor position, selecting one of the first and second sets of current control parameters based on the rotor speed, and operating the gates according to the selected set of current control parameters.
    Type: Application
    Filed: June 11, 2012
    Publication date: December 12, 2013
    Applicant: CATERPILLAR, INC.
    Inventors: Jesse Gerdes, James Siegle, Mark Hartman, Aaron Luther Thomas, Jackson Wai