Patents by Inventor AHMED ELSEROUGI

AHMED ELSEROUGI 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).

  • Self-balanced non-isolated hybrid modular DC-DC converter based on low duty cycle operation and sequential capacitors charging/discharging for medium voltage DC grids
    Patent number: 10644596
    Abstract: An electrical converter is provided, comprising a first half-bridge sub-module, a switch, and a first capacitor. The half-bridge sub-module is connected to the first capacitor, and the switch is connected to a terminal of the first half-bridge sub-module. The switch includes a plurality of insulated-gate bipolar transistors. The insulated-gate bipolar transistors are serially connected with each other.
    Type: Grant
    Filed: December 1, 2018
    Date of Patent: May 5, 2020
    Assignee: QATAR UNIVERSITY
    Inventors: Ahmed Elserougi, Ahmed Massoud, Shehab Ahmed
  • Modular isolated half-bridge based capacitor-tapped multi-module converter with inherent DC fault segregation capability
    Patent number: 10530270
    Abstract: An electrical converter, comprising a plurality of first modules and a plurality of second modules. At least one of the plurality of first modules includes a half-bridge module coupled with a direct current (DC)-link capacitor. A diode connected across the DC-link capacitor and a thyristor. At least one of the plurality of second modules is connected to at least one of the plurality of first modules.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: January 7, 2020
    Assignee: QATAR UNIVERSITY
    Inventors: Ahmed Elserougi, Ahmed Massoud, Shehab Ahmed
  • SELF-BALANCED NON-ISOLATED HYBRID MODULAR DC-DC CONVERTER BASED ON LOW DUTY CYCLE OPERATION AND SEQUENTIAL CAPACITORS CHARGING/DISCHARGING FOR MEDIUM VOLTAGE DC GRIDS
    Publication number: 20190267898
    Abstract: An electrical converter is provided, comprising a first half-bridge sub-module, a switch, and a first capacitor. The half-bridge sub-module is connected to the first capacitor, and the switch is connected to a terminal of the first half-bridge sub-module.
    Type: Application
    Filed: December 1, 2018
    Publication date: August 29, 2019
    Inventors: Ahmed ELSEROUGI, Ahmed Massoud, Shehab Ahmed
  • MODULAR ISOLATED HALF-BRIDGE BASED CAPACITOR-TAPPED MULTI-MODULE CONVERTER WITH INHERENT DC FAULT SEGREGATION CAPABILITY
    Publication number: 20190173391
    Abstract: An electrical converter, comprising a plurality of first modules and a plurality of second modules. At least one of the plurality of first modules includes a half-bridge module coupled with a direct current (DC)-link capacitor. A diode connected across the DC-link capacitor and a thyristor. At least one of the plurality of second modules is connected to at least one of the plurality of first modules.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 6, 2019
    Inventors: Ahmed ELSEROUGI, Ahmed Massoud, Shehab Ahmed
  • DC side fault isolator for high voltage DC convertors
    Patent number: 9654023
    Abstract: The direct current (DC) side fault isolator for high voltage direct current (HVDC) converters (10) includes a first set of double thyristor switches (12) connected across the line-to-line voltage terminals between first and second phases of alternating current (AC) terminals of a HVDC converter (14), and a second set of double thyristor switches (12) connected across the line-to-line voltage between the second phase and a third phase of the AC terminals of the HVDC converter (14). In use, the first and second sets of double thyristor switches (12) separate the HVDC converter (10) from an external power grid (18) during direct current (DC) side faults by turning on these thyristors (12).
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: May 16, 2017
    Assignee: QATAR FOUNDATIONFOR EDUCATION, SCIENCE AND COMMUNICTY DEVELOPMENT
    Inventors: Ahmed Elserougi, Ayman Abdel-Khalik, Ahmed Massoud, Shehab Ahmed
  • DC SIDE FAULT ISOLATOR FOR HIGH VOLTAGE DC CONVERTORS
    Publication number: 20170033708
    Abstract: The direct current (DC) side fault isolator for high voltage direct current (HVDC) converters (10) includes a first set of double thyristor switches (12) connected across the line-to-line voltage terminals between first and second phases of alternating current (AC) terminals of a HVDC converter (14), and a second set of double thyristor switches (12) connected across the line-to-line voltage between the second phase and a third phase of the AC terminals of the HVDC converter (14). In use, the first and second sets of double thyristor switches (12) separate the HVDC converter (10) from an external power grid (18) during direct current (DC) side faults by turning on these thyristors (12).
    Type: Application
    Filed: January 27, 2015
    Publication date: February 2, 2017
    Applicants: QATAR FOUNDATION FOR EDUCATION, SCIENCE AND COMMUNITY DEVELOPMENT, QATAR UNIVERSITY
    Inventors: AHMED ELSEROUGI, AYMAN ABDEL-KHALIK, AHMED MASSOUD, SHEHAB AHMED