Patents by Inventor Mark V. Nelson

Mark V. Nelson 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 and apparatus for motor drive diagnostics
    Patent number: 9612998
    Abstract: A method for detecting fault conditions in a motor drive at power up is disclosed. During the power up sequence, input power is applied to the motor drive and the DC bus begins to charge to its normal operating level. Once the DC bus has reached a suitable level and prior to commanding motion of the attached motor, the shunt resistor is connected across the DC bus for a short duration. The amplitude of voltage and current present on the DC bus are measured while the shunt resistor is connected across the DC bus. The measurements are then used to detect fault conditions in the motor drive. The presence of the fault conditions are relayed to an operator. Thus, the motor drive may detect certain fault conditions prior to commanding motion from the drive.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: April 4, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Mark V. Nelson, Craig R. Winterhalter, Jeffrey J. Pankau, Patrick E. Ozimek
  • Method and Apparatus for Motor Drive Diagnostics
    Publication number: 20140136130
    Abstract: A method for detecting fault conditions in a motor drive at power up is disclosed. During the power up sequence, input power is applied to the motor drive and the DC bus begins to charge to its normal operating level. Once the DC bus has reached a suitable level and prior to commanding motion of the attached motor, the shunt resistor is connected across the DC bus for a short duration. The amplitude of voltage and current present on the DC bus are measured while the shunt resistor is connected across the DC bus. The measurements are then used to detect fault conditions in the motor drive. The presence of the fault conditions are relayed to an operator. Thus, the motor drive may detect certain fault conditions prior to commanding motion from the drive.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Mark V. Nelson, Craig R. Winterhalter, Jeffrey J. Pankau, Patrick E. Ozimek