Patents by Inventor Mohammed Agamy

Mohammed Agamy 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).

  • Publication number: 20170353111
    Abstract: According to some embodiments, an electronic drive circuit is disclosed. The electronic drive circuit includes an energy storage device and a first bridge circuit coupled to the energy storage device. The first bridge circuit includes at least one leg having two switches. The electronic drive circuit also includes a transformer. The transformer includes a first winding coupled to the first bridge circuit and a second winding coupled to the energy storage device through a center tap. The electronic drive circuit further includes a second bridge circuit coupled to the second winding of the transformer. The second bridge circuit includes a pair of switches operable to conduct in both directions and block voltage in both directions.
    Type: Application
    Filed: June 6, 2016
    Publication date: December 7, 2017
    Applicant: General Electric Company
    Inventors: Ahmed Elasser, Mohammed Agamy, Kum Kang Huh
  • Patent number: 9705422
    Abstract: A power inversion system includes an input and output coupleable to a DC power and an AC load, respectively, and a power inverter including a plurality of phase legs each having two bridge legs coupled in parallel with at least two switch and antiparallel diode pairs coupled in series. The system also includes a plurality of inductors, with at least one inductor coupled between a midpoint of each bridge leg and an LCL filter, the inductors in each phase leg being magnetically coupled. The system further includes a control system to drive the power inverter in a soft switching configuration, the control system programmed to output a switching signal to the power inverter according to a duty cycle and a phase shift angle, determine a value of the duty cycle, and optimize the phase shift angle of the power inverter based on the value of the duty cycle.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: July 11, 2017
    Assignee: General Electric Company
    Inventors: Xiaohu Liu, Luis Jose Garces, Maja Harfman Todorovic, Mohammed Agamy
  • Patent number: 9667157
    Abstract: A power converter includes a first bus converter for converting a first direct current (DC) bus voltage into a first high frequency alternating current (AC) voltage and a second bus converter for converting a second high frequency AC voltage into a second DC bus voltage. A resonant circuit couples the first bus converter and the second bus converter. Further, a controller provides switching signals to the first bus converter and the second bus converter to operate the power converter in a soft switching mode. The controller includes a voltage detection circuit connected across at least one switching device of the power converter to detect a device voltage across the at least one switching device and a counter to count a number of hard switching detection pulses of the hard switching pulse signal detector.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: May 30, 2017
    Assignee: General Electric Company
    Inventors: Dong Dong, Luis Jose Garces, Mohammed Agamy, Ravisekhar Nadimpalli Raju, Yan Pan
  • Publication number: 20170022766
    Abstract: A switch assembly includes one or more solid state semiconductor switches configured to be disposed within a downhole pipe assembly. The one or more switches are configured to operate in a closed state to conduct electric current supplied by a power source disposed above a surface to pumps disposed beneath the surface to cause the pumps to extract a resource from beneath the surface via the pipe assembly. The one or more switches also are configured to operate in an open state to stop conducting the electric current from the power source to the pumps.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Inventors: Dong Dong, Antonio Caiafa, Mohammed Agamy, Ahmed Elasser, Philip Michael Cioffi
  • Patent number: 9525355
    Abstract: A converter system includes a power converter including a first bridge circuit including at least one first switching device. The power converter also includes a second bridge circuit magnetically coupled to the first bridge circuit. The second bridge circuit includes at least one second switching device. The converter system also includes a plurality of first conductors of opposing polarities coupled to the first bridge circuit. The converter system further includes a plurality of second conductors of opposing polarities. At least one second conductor of the plurality of second conductors is coupled to the second bridge circuit. The converter system also includes a third conductor coupled to one first conductor of the plurality of first conductors and coupled to the second bridge circuit.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 20, 2016
    Assignee: General Electric Company
    Inventors: Mohammed Agamy, Herman Lucas Norbert Wiegman, Rui Zhou, Andrew William Berner
  • Publication number: 20160352253
    Abstract: A power inversion system includes an input and output coupleable to a DC power and an AC load, respectively, and a power inverter including a plurality of phase legs each having two bridge legs coupled in parallel with at least two switch and antiparallel diode pairs coupled in series. The system also includes a plurality of inductors, with at least one inductor coupled between a midpoint of each bridge leg and an LCL filter, the inductors in each phase leg being magnetically coupled. The system further includes a control system to drive the power inverter in a soft switching configuration, the control system programmed to output a switching signal to the power inverter according to a duty cycle and a phase shift angle, determine a value of the duty cycle, and optimize the phase shift angle of the power inverter based on the value of the duty cycle.
    Type: Application
    Filed: May 27, 2015
    Publication date: December 1, 2016
    Inventors: Xiaohu Liu, Luis Jose Garces, Maja Harfman Todorovic, Mohammed Agamy
  • Publication number: 20160344335
    Abstract: A system and method for a photovoltaic (PV) module is disclosed that includes a microinverter assembly having a housing disposed on an inactive surface of a PV panel and a microinverter disposed within the housing. The PV module also includes a mounting bracket having a central bracket portion coupled to a frame of the PV panel, a first extension portion extending from the central bracket portion and coupled to the housing, a second extension portion extending from the central bracket portion and positioned on the inactive side of the PV panel, and a third extension portion located above the second extension portion and extending from the central bracket portion. At least one of the second and third extension portions is in contact with an inner wall of the frame of the PV panel.
    Type: Application
    Filed: May 20, 2015
    Publication date: November 24, 2016
    Inventors: Philip Michael Cioffi, Mohammed Agamy
  • Publication number: 20160344337
    Abstract: A system and method for a microinverter mounting assembly including a microinverter assembly and a panel direct connect (DC) connector. The microinverter assembly having a housing, a microinverter disposed within the housing, and a microinverter DC connector disposed within the housing and electrically coupled to the microinverter, the microinverter DC connector with a bottom panel having a locking recess formed therein and at least one electrical contact disposed within an opening formed in the bottom panel. The panel DC connector having a mounting substrate, a locking tab extending from the mounting substrate, and at least one electrical contact positioned on the mounting substrate. Further, the locking tab of the panel DC connector interfits within the locking recess of the microinverter DC connector to form a locking mechanism that prevents rotation of the microinverter DC connector when in a locked position.
    Type: Application
    Filed: May 20, 2015
    Publication date: November 24, 2016
    Inventors: Philip Michael Cioffi, Mohammed Agamy
  • Publication number: 20160285374
    Abstract: A converter system includes a power converter including a first bridge circuit including at least one first switching device. The power converter also includes a second bridge circuit magnetically coupled to the first bridge circuit. The second bridge circuit includes at least one second switching device. The converter system also includes a plurality of first conductors of opposing polarities coupled to the first bridge circuit. The converter system further includes a plurality of second conductors of opposing polarities. At least one second conductor of the plurality of second conductors is coupled to the second bridge circuit. The converter system also includes a third conductor coupled to one first conductor of the plurality of first conductors and coupled to the second bridge circuit.
    Type: Application
    Filed: March 26, 2015
    Publication date: September 29, 2016
    Inventors: Mohammed Agamy, Herman Lucas Norbert Wiegman, Rui Zhou, Andrew William Berner
  • Patent number: 9401708
    Abstract: A gate drive unit includes a charging device, a switch, and a timing module. The charging device is conductively coupled with an electrical energy source and a power switch between the electric energy source and the charging device. The switch closes to transfer electrical energy from the energy source to the charging device. The timing module is configured to close the switch to direct the electrical energy from the electrical energy source to the charging device for a designated charging time period in order to charge the charging device with the electrical energy while the power switch is in an OFF state. The timing module opens the switch to cause the electrical energy stored in the charging device to be transferred out of the charging device in the form of a trigger current that is conducted to a gate terminal of the power switch to activate the power switch to an ON state from the OFF state.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: July 26, 2016
    Assignee: General Electric Company
    Inventors: Fengfeng Tao, Ahmed Elasser, Mohammed Agamy, Patrick Kirlew
  • Patent number: 9300140
    Abstract: A system and method of using one or more DC-DC/DC-AC converters and/or alternative devices allows strings of multiple module technologies to coexist within the same PV power plant. A computing (optimization) framework estimates the percentage allocation of PV power plant capacity to selected PV module technologies. The framework and its supporting components considers irradiation, temperature, spectral profiles, cost and other practical constraints to achieve the lowest levelized cost of electricity, maximum output and minimum system cost. The system and method can function using any device enabling distributed maximum power point tracking at the module, string or combiner level.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: March 29, 2016
    Assignee: General Electric Company
    Inventors: Bex George Thomas, Ahmed Elasser, Srinivas Bollapragada, Anthony William Galbraith, Mohammed Agamy, Maxim Valeryevich Garifullin
  • Publication number: 20150341028
    Abstract: A gate drive unit includes a charging device, a switch, and a timing module. The charging device is conductively coupled with an electrical energy source and a power switch between the electric energy source and the charging device. The switch closes to transfer electrical energy from the energy source to the charging device. The timing module is configured to close the switch to direct the electrical energy from the electrical energy source to the charging device for a designated charging time period in order to charge the charging device with the electrical energy while the power switch is in an OFF state. The timing module opens the switch to cause the electrical energy stored in the charging device to be transferred out of the charging device in the form of a trigger current that is conducted to a gate terminal of the power switch to activate the power switch to an ON state from the OFF state.
    Type: Application
    Filed: May 20, 2014
    Publication date: November 26, 2015
    Applicant: General Electric Company
    Inventors: Fengfeng Tao, Ahmed Elasser, Mohammed Agamy, Patrick Kirlew
  • Publication number: 20150330195
    Abstract: Power systems and methods are disclosed herein. The systems and methods use a switching system coupled with a power source and subterranean pumps for pumping a resource from beneath a surface of earth. A first capacitor is between a first switching device and a first transformer, and stores electric energy received from the first transformer to activate the first switching device. A bias capacitor is between the first capacitor and the first switching device, and receives a bias voltage via a second transformer. The bias capacitor applies the bias voltage to the first switching device to prevent the first switching device from activating unless a combination of the voltage received by the first switching device via the first transformer and the bias voltage is at least as large as the activation voltage of the first switching device.
    Type: Application
    Filed: July 24, 2015
    Publication date: November 19, 2015
    Inventors: Dong Dong, Antonio Caiafa, Mohammed Agamy, Ahmed Elasser
  • Patent number: 8829715
    Abstract: A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: September 9, 2014
    Assignee: General Electric Company
    Inventors: Mohammed Agamy, Ahmed Elasser, Juan Antonio Sabate, Anthony William Galbraith, Maja Harfman Todorovic
  • Publication number: 20140001856
    Abstract: A partial power converter includes a converter leg including an upper portion comprising at least one diode connected to a positive output node of an output terminal of the partial power converter and a lower portion comprising at least two switches connected in series with each other and with the at least one diode and to a negative output node of the output terminal of the partial power The partial power converter also includes at least one flying capacitor connected between the at least two switches at a first end and to either of the upper portion of the converter leg or the positive output node of the partial power converter at a second end.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Mohammed Agamy, Ahmed Elasser, Maja Harfman Todorovic
  • Publication number: 20140005845
    Abstract: A system and method of using one or more DC-DC/DC-AC converters and/or alternative devices allows strings of multiple module technologies to coexist within the same PV power plant. A computing (optimization) framework estimates the percentage allocation of PV power plant capacity to selected PV module technologies. The framework and its supporting components considers irradiation, temperature, spectral profiles, cost and other practical constraints to achieve the lowest levelized cost of electricity, maximum output and minimum system cost. The system and method can function using any device enabling distributed maximum power point tracking at the module, string or combiner level.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 2, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Bex George Thomas, Ahmed Elasser, Srinivas Bollapragada, Anthony William Galbraith, Mohammed Agamy, Maxim Valeryevich Garifullin
  • Publication number: 20130343089
    Abstract: An electronics power system includes a plurality of substantially identical power electronic modules. Each power electronic module includes a single-phase DC/AC inverter having an output side. Each power electronic module further includes a medium/high-frequency-isolated DC/DC current-to-voltage converter having an input side. The medium/high-frequency-isolated DC/DC current-to-voltage converter drives the single-phase DC/AC inverter. Each DC/DC converter and its corresponding DC/AC inverter are connected back-to-back sharing a common DC-link. The plurality of power electronics modules is stacked together in series at the input side and in parallel or series/parallel at the output side.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 26, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ranjan Kumar Gupta, Ravisekhar Nadimpalli Raju, Rajib Datta, Mohammed Agamy
  • Publication number: 20130076144
    Abstract: A system and method are provided for enabling a PV inverter to be connected to a string of series connected PV modules without exposing the inverter to elevated voltage stresses. The input voltage to the inverter is gradually built up by sequentially switching in more series PV modules. This system and method are simple to implement in both centralized and distributed PV power plants and in either case, it significantly increases the utilization of the PV inverter. The input switching elements can be implemented using a wide variety of parts including electro-mechanical switches, semiconductor switches (IGBTs, MOSFETs . . . , etc.) as well as MEMS devices depending on the current level and target cost. A mix of switches can also be used to assist in minimizing impedance of the final switching stage that remains connected during normal operation.
    Type: Application
    Filed: September 28, 2011
    Publication date: March 28, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Mohammed Agamy, Ahmed Elasser, Anthony William Galbraith, Maja Harfman-Todorovic
  • Patent number: 8330299
    Abstract: A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: December 11, 2012
    Assignee: General Electric Company
    Inventors: Robert Louis Steigerwald, Ahmed Elasser, Juan Antonio Sabate, Maja Harfman Todorovic, Mohammed Agamy
  • Publication number: 20120274139
    Abstract: A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 1, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Mohammed Agamy, Ahmed Elasser, Juan Antonio Sabate, Anthony William Galbraith, Maja Harfman Todorovic