Patents by Inventor Franz C. Zach

Franz C. Zach 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).

  • Method for providing adaptive control of variable speed AC motor drives
    Patent number: 4481457
    Abstract: A microprocessor based pulse-width modulated variable speed drive control system providing optimal switching angles based on minimizing r.m.s. current ripple. In addition, a closed loop double deadband control interacts with the optimal switching angles to insure close following of a desired function of a specified variable to be controlled.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: November 6, 1984
    Assignee: General Electric Company
    Inventors: Franz C. Zach, Bimal K. Bose, Paul M. Espelage, John S. Sicko
  • Optimal and adaptive control of variable speed AC motor drives
    Patent number: 4387421
    Abstract: A microprocessor based pulse-width modulated variable speed drive control system providing optimal switching angles based on minimizing r.m.s. current ripple. In addition, a closed loop double deadband control interacts with the optimal switching angles to insure close following of a desired function of a specified variable to be controlled.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: June 7, 1983
    Assignee: General Electric Company
    Inventors: Franz C. Zach, Bimal K. Bose, Paul M. Espelage, John S. Sicko