Patents by Inventor CHRISTOPHER L. MAROHL

CHRISTOPHER L. MAROHL 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).

  • SYSTEM AND METHOD FOR CONTROLLING MODULATION OF AN INVERTER
    Publication number: 20150280633
    Abstract: A current measurement module is adapted to measure an observed current level for the inverter. A data processor or mode controller accesses a stored representation of first current level versus rotor speed output at which a total harmonic distortion level is less than threshold total harmonic distortion level. The data processor or mode controller enables the inverter to use SVPWM (space vector pulse width modulation) if the observed current level is less than the first current level for the measured or determined rotor speed. Further, the data processor or mode controller enables the inverter to use DPWM (discontinuous pulse width modulation) if the observed current level is greater than or equal to the first current level for the measured or determined rotor speed.
    Type: Application
    Filed: May 29, 2014
    Publication date: October 1, 2015
    Applicant: DEERE & COMPANY
    Inventors: CHRISTOPHER L. MAROHL, DAVID HOLMBURG, ANTHONY WEBER, LONG WU, JARED LERVIK
  • SYSTEM AND METHOD FOR CONTROLLING MODULATION OF AN INVERTER
    Publication number: 20150280619
    Abstract: A current measurement module is adapted to measure an observed current level for the inverter. A data processor or mode controller accesses a stored representation of first current level versus rotor speed output at which a total harmonic distortion level is less than threshold total harmonic distortion level. The data processor or mode controller enables the inverter to use SVPWM (space vector pulse width modulation) if the observed current level is less than the first current level for the measured or determined rotor speed. Further, the data processor or mode controller enables the inverter to use DPWM (discontinuous pulse width modulation) if the observed current level is greater than or equal to the first current level for the measured or determined rotor speed.
    Type: Application
    Filed: May 29, 2014
    Publication date: October 1, 2015
    Applicant: DEERE & COMPANY
    Inventors: CHRISTOPHER L. MAROHL, DAVID HOLMBURG, ANTHONY WEBER, LONG WU, JARED LERVIK