Patents by Inventor Krushna K. Mohapatra

Krushna K. Mohapatra 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).

  • Open-ended control circuit for electrical apparatus
    Patent number: 8169179
    Abstract: An AC machine control system for an AC machine (motor, generator, transformer, etc.) having open-ended windings, the control system comprising a drive circuit configured to transfer AC power between a first set of voltages and each end of the open-ended windings without the use of a substantial energy storage device, while eliminating common mode voltage and/or injecting zero sequence voltages.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: May 1, 2012
    Assignee: Regents of The University of Minnesota
    Inventors: Ned Mohan, Krushna K. Mohapatra
  • Carrier-based pulse-width modulation (PWM) control for matrix converters
    Patent number: 7869236
    Abstract: A matrix converter includes a plurality of switches that electrically connect a multi-phase input voltage source to a multi-phase load; and a controller to output pulse-width modulated (PWM) switching signals to control the switches to produce a multi-phase output voltage from the multi-phase input voltage source. The controller outputs the PWM switching signals by modulating a carrier signal with a time-varying signal having a frequency determined from a desired output frequency for the output voltage.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: January 11, 2011
    Assignee: Regents of the University of Minnesota
    Inventors: Ned Mohan, Krushna K. Mohapatra, Satish Thuta, Gaurav K. Aggarwal, Philip Jose