Patents by Inventor Gary R. Woltersdorf

Gary R. Woltersdorf 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).

  • Patent number: 7626836
    Abstract: An apparatus and method for controlling an inverter, the apparatus including an adjustable frequency controller receiving a reference frequency value and generating a command frequency value as a function thereof, an adjustable voltage controller receiving a reference voltage value and generating a command voltage value as a function thereof and independent of the command frequency and a modulator receiving the command frequency value and the command voltage value and generating pulse width modulated (PWM) inverter control signals as a function thereof.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: December 1, 2009
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: David Leggate, Gary Leonard Skibinski, Gary R. Woltersdorf
  • Publication number: 20070091653
    Abstract: An apparatus and method for controlling an inverter, an exemplary apparatus comprising an adjustable frequency controller receiving a reference frequency value and generating a command frequency value as a function thereof, an adjustable voltage controller receiving a reference voltage value and generating a command voltage value as a function thereof and independent of the command frequency and a modulator receiving the command frequency value and the command voltage value and generating pulse width modulated (PWM) inverter control signals as a function thereof.
    Type: Application
    Filed: October 26, 2005
    Publication date: April 26, 2007
    Inventors: David Leggate, Gary Leonard Skibinski, Gary R. Woltersdorf
  • Patent number: 6577483
    Abstract: An apparatus for decreasing speed of an inverter driven inertial load within a time period for use with a dynamic brake across a DC link including a controller for controlling the inverter to regulate the power returned to the brake such that, when a brake command is received, the power is increased during a power-up period while motor deceleration begins and up to a constant power level after which the constant power level is maintained by increasing torque such that the dynamic brake is fully used during the majority of a braking cycle and a method to accomplish the same.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 10, 2003
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: John T. Steicher, Gary R. Woltersdorf, Jeffrey M. Theisen, Jerry Dee Thunes, John Joseph Golownia, Jr.