Patents by Inventor Joseph Raymond Pottebaum

Joseph Raymond Pottebaum 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).

  • Motor speed control with speed foldback for phase imbalance protection
    Patent number: 9887648
    Abstract: A variable frequency motor drive comprises a converter including a rectifier having an input for connection to an AC power source and converting the AC power to DC power. A DC bus is connected to the rectifier circuit. At least one bus capacitor is across the DC bus. An inverter receives DC power from the DC bus and converts the DC power to AC power to drive a motor. A controller is operatively connected to the converter. The controller comprises a speed control controlling the inverter responsive to a speed command to maintain a desired motor speed. A speed foldback control measures DC bus ripple voltage and regulates the speed command responsive to the measured DC bus ripple voltage.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: February 6, 2018
    Assignee: Yaskawa America, Inc.
    Inventors: Joseph Raymond Pottebaum, John Alan Cairo, Brian W. Geoffrey, William C. Phillips
  • MOTOR SPEED CONTROL WITH SPEED FOLDBACK FOR PHASE IMBALANCE PROTECTION
    Publication number: 20150115854
    Abstract: A variable frequency motor drive comprises a converter including a rectifier having an input for connection to an AC power source and converting the AC power to DC power. A DC bus is connected to the rectifier circuit. At least one bus capacitor is across the DC bus. An inverter receives DC power from the DC bus and converts the DC power to AC power to drive a motor. A controller is operatively connected to the converter. The controller comprises a speed control controlling the inverter responsive to a speed command to maintain a desired motor speed. A speed foldback control measures DC bus ripple voltage and regulates the speed command responsive to the measured DC bus ripple voltage.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: YASKAWA AMERICA, INC.
    Inventors: Joseph Raymond Pottebaum, JOHN ALAN CAIRO, BRIAN W. GEOFFREY, WILLIAM C. PHILLIPS