Patents by Inventor Sean D. Robertson

Sean D. Robertson 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).

  • Patent number: 11038336
    Abstract: Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes an energy storage device for providing operational power even upon loss of all control power sources. The energy storage may be sufficient to ride through expected losses such as a time to start up backup generation. The energy storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power. A discharge circuit is provided to allow an operator to de-energize an energy storage device.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: June 15, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, David E. Whitehead, David J. Casebolt, Krishnanjan Gubba Ravikumar, Sean D. Robertson, Austin Edward Wade, Bruce A. Hall
  • Publication number: 20210167590
    Abstract: Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes an energy storage device for providing operational power even upon loss of all control power sources. The energy storage may be sufficient to ride through expected losses such as a time to start up backup generation. The energy storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power. A discharge circuit is provided to allow an operator to de-energize an energy storage device.
    Type: Application
    Filed: February 8, 2021
    Publication date: June 3, 2021
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, David E. Whitehead, David J. Casebolt, Krishnanjan Gubba Ravikumar, Sean D. Robertson, Austin Edward Wade, Bruce A. Hall
  • Patent number: 10951057
    Abstract: Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes a power storage device for providing operational power even upon loss of all control power sources. The power storage may be sufficient to ride through expected losses such as a time to start up backup generation. The power storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: March 16, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, David E. Whitehead, Tony J. Lee, David J. Casebolt, Krishnanjan Gubba Ravikumar, Austin Edward Wade, Bruce A. Hall, Kelsey M. Loughlin, Sean D. Robertson
  • Patent number: 10666156
    Abstract: The present disclosure relates to power converters that convert power in different control modes based on the input voltage. For example, a power converter may include power conversion circuitry that receives electrical energy from an input at an input voltage and provides the electrical energy at an output voltage. The power converter may include control circuitry that receives a signal indicating the input voltage. The control circuitry may select a control mode from a plurality of control modes based at least in part on the input voltage. The control circuitry may control operation of the switch of the power conversion circuitry based at least in part on the control mode selected.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: May 26, 2020
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bruce A. Hall, Sean D. Robertson
  • Publication number: 20200112262
    Abstract: The present disclosure relates to power converters that convert power in different control modes based on the input voltage. For example, a power converter may include power conversion circuitry that receives electrical energy from an input at an input voltage and provides the electrical energy at an output voltage. The power converter may include control circuitry that receives a signal indicating the input voltage. The control circuitry may select a control mode from a plurality of control modes based at least in part on the input voltage. The control circuitry may control operation of the switch of the power conversion circuitry based at least in part on the control mode selected.
    Type: Application
    Filed: February 22, 2019
    Publication date: April 9, 2020
    Applicant: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bruce A. Hall, Sean D. Robertson