Patents by Inventor Nabeel A.O. Demerdash

Nabeel A.O. Demerdash 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).

  • On-line diagnostic method for electronic switch faults in neutral-point-clamped converters
    Patent number: 11119159
    Abstract: Systems and methods of diagnosing open-circuit fault in power converters receives a neutral point current value, a switching state of the power converter, and load current values. At least one fault condition is identified based upon the switching state of the power converter and the load current values. The neutral point current value current value is compared to the at least one fault condition. An open circuit fault is determined to be present at the switching state of the power converter based upon the comparison.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: September 14, 2021
    Assignee: Marquette University
    Inventors: Jiangbiao He, Nabeel A. O. Demerdash
  • AN ON-LINE DIAGNOSTIC METHOD FOR ELECTRONIC SWITCH FAULTS IN NEUTRAL-POINT-CLAMPED CONVERTERS
    Publication number: 20200292629
    Abstract: Systems and methods of diagnosing open-circuit fault in power converters receives a neutral point current value, a switching state of the power converter, and load current values. At least one fault condition is identified based upon the switching state of the power converter and the load current values. The neutral point current value current value is compared to the at least one fault condition.
    Type: Application
    Filed: November 10, 2016
    Publication date: September 17, 2020
    Applicant: Marquette University
    Inventors: Jiangbiao He, Nabeel A.O. Demerdash
  • Fault-tolerant topology for multilevel T-type converters
    Patent number: 10658920
    Abstract: Systems and methods of fault tolerant power conversion include an inverter with a plurality of inverter phase legs. Each phase leg includes a positive switch, a negative switch, and a bi-directional midpoint switch. Redundant phase leg includes a positive redundant switch connected between the positive switches and the bi-directional midpoint switches. The redundant phase leg includes a negative redundant switch connected between the negative switches and the bi-directional midpoint switches. Upon detection of a fault condition in at least one switch of the plurality of inverted phase legs, one of the positive redundant switch and the negative redundant switch is closed to bypass at least one switch with the fault condition to maintain operation of the power converter.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: May 19, 2020
    Assignee: Marquette University
    Inventors: Jiangbiao He, Nabeel A. O. Demerdash
  • FAULT-TOLERANT TOPOLOGY FOR MULTILEVEL T-TYPE CONVERTERS
    Publication number: 20180337590
    Abstract: Systems and methods of fault tolerant power conversion include an inverter with a plurality of inverter phase legs. Each phase leg includes a positive switch, a negative switch, and a bi-directional midpoint switch. Redundant phase leg includes a positive redundant switch connected between the positive switches and the bi-directional midpoint switches. The redundant phase leg includes a negative redundant switch connected between the negative switches and the bi-directional midpoint switches. Upon detection of a fault condition in at least one switch of the plurality of inverted phase legs, one of the positive redundant switch and the negative redundant switch is closed to bypass at least one switch with the fault condition to maintain operation of the power converter.
    Type: Application
    Filed: November 10, 2016
    Publication date: November 22, 2018
    Applicant: Marquette University
    Inventors: Jiangbiao He, Nabeel A.O. Demerdash