Patents by Inventor Fengfeng Tao
Fengfeng Tao 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).
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Publication number: 20120144832Abstract: A gas turbine combustion system passive air-fuel mixing prechamber includes one or more fuel passages. Each fuel passage includes at least one downstream fuel injection orifice. One or more fluid conduits connect an upstream portion of at least one fuel passage with one or more air passages such that pressure drops across each fuel injection orifice substantially self-equalize in a passive manner with corresponding air passage pressure drops over a broad range of fuel lower heating value (LHV) from about 150 Btu/scf to about 900 Btu/scf of fuel passing through the fuel passage while mixing with air passing through one or more connected fluid conduits. The effective area of each fluid conduit relative to the corresponding fuel and air passages is dependent upon the desired fuel LHV operating range.Type: ApplicationFiled: December 10, 2010Publication date: June 14, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: John Thomas Herbon, Matthew Patrick Boespflug, Grover Andrew Bennett, Fengfeng Tao, Giridhar Jothiprasad
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Patent number: 8023296Abstract: A high voltage, high speed, and high repetition rate pulse generator solves the high pulse repetition rate limitations associated with RF power amplifiers. The pulse generator employs resonant techniques to provide current limiting features that allow for continued high voltage, high speed, and high repetition pulse rate operation of the pulse generator without impairment of the pulse generator during both short circuit and open circuit load conditions.Type: GrantFiled: September 6, 2007Date of Patent: September 20, 2011Assignee: General Electric CompanyInventors: Fengfeng Tao, Frank Jakob John Mueller, Robert Carl Murray, Abdelkrim Younsi, Seyed Gholamali Saddoughi, Joseph Taher Mossoba, John Stanley Glaser
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Publication number: 20110074361Abstract: A power converter utilizes one or more nonlinear composite film capacitors constructed solely of polymer anti-ferroelectric (AFE) particle composites and configured as DC-link bus capacitors providing an energy buffer to reduce DC-link voltage ripple.Type: ApplicationFiled: September 30, 2009Publication date: March 31, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Fengfeng Tao, Yang Cao, Daniel Qi Tan
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Patent number: 7884504Abstract: A high voltage, fast pulse rise/fall time, and high repetition rate pulse generator solves the high pulse repetition rate limitations associated with RF power amplifiers and gap switch type pulse generators. The pulse generator employs a transmission line architecture and structural techniques that allow for continued high voltage, fast rise/fall time, and high repetition pulse rate operation of the pulse generator without impairment of the pulse generator while exceeding performance characteristics achievable with conventional RF power amplifiers and gap switch type pulse generators.Type: GrantFiled: March 3, 2008Date of Patent: February 8, 2011Assignee: General Electric CompanyInventors: Fengfeng Tao, Frank Jakob John Mueller, Robert Carl Murray, Seyed Gholamali Saddoughi, Abdelkrim Younsi
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Publication number: 20100301702Abstract: A high gain pulse generator includes a piezoelectric transformer (PT) that is driven by an input power stage to drive the PT at a desired PT resonant frequency such that at least one PT characteristic substantially matches at least one non-linear load characteristic such as, without limitation, a plasma load characteristic to deliver a desired pulse to the non-linear load.Type: ApplicationFiled: May 27, 2009Publication date: December 2, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Fengfeng Tao, Grover Andrew Bennett, JR., Frank Jakob John Mueller, Robert Carl Murray, Seyed Gholamali Saddoughi, Edward Henry Allen
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Patent number: 7817396Abstract: A plasma generation system includes a pulse generator having at least one switch and that is configured to convert a DC voltage to a desired high frequency, high breakdown voltage pulse sufficient to break down a high-breakdown voltage gap, wherein all pulse generator switches are solely low to medium voltage, high frequency switches, and further configured to apply the breakdown voltage to a plasma load for the generation of plasma. In one application, the plasma generation system is useful to manipulate the flow of jets and provide highly efficient acoustic noise reduction.Type: GrantFiled: October 25, 2007Date of Patent: October 19, 2010Assignee: General Electric CompanyInventors: Fengfeng Tao, Seyed Gholamali Saddoughi, Robert Carl Murray, Abdelkrim Younsi, Steven Martens
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Patent number: 7675226Abstract: A high-frequency, high-voltage electron switch includes an electron source, a steering mechanism, a mask or anode plate, and a target. The electron source produces a beam of electrons with a voltage of at least about 1 kV that impinges upon the anode plate. The steering mechanism scans the electron beam across the anode plate at a scanning frequency of at least about 10 MHz. A hole or aperture is provided in the anode plate that allows the electron beam to pass through and produce a pulsed, high-voltage current in the target with a very high-frequency repetition rate and a very fast rise time. The pulsed, high-voltage current produced in the target can be used to cause a high-voltage source to turn on and off.Type: GrantFiled: April 17, 2007Date of Patent: March 9, 2010Assignee: General Electric CompanyInventors: Robert Carl Murray, Karim Younsi, Fengfeng Tao, Seyed Gholamali Saddoughi
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Patent number: 7668295Abstract: A system and method to improve the high voltage performance of an x-ray tube with electrostatic deflection of an electron beam focal spot. The system and method provides protection of bias circuits from high voltage transients and spit protection in x-ray tubes through the use of a high voltage transient suppression and spit protection circuit assembly coupled between the bias circuits of a high voltage generator and an x-ray tube vacuum housing of an x-ray generation system.Type: GrantFiled: May 14, 2007Date of Patent: February 23, 2010Assignee: General Electric Co.Inventors: Liang Tang, Philippe Ernest, Georges-William Baptiste, Fengfeng Tao
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Publication number: 20090219071Abstract: A high voltage, fast pulse rise/fall time, and high repetition rate pulse generator solves the high pulse repetition rate limitations associated with RF power amplifiers and gap switch type pulse generators. The pulse generator employs a transmission line architecture and structural techniques that allow for continued high voltage, fast rise/fall time, and high repetition pulse rate operation of the pulse generator without impairment of the pulse generator while exceeding performance characteristics achievable with conventional RF power amplifiers and gap switch type pulse generators.Type: ApplicationFiled: March 3, 2008Publication date: September 3, 2009Applicant: General Electric CompanyInventors: Fengfeng Tao, Frank Jakob John Mueller, Robert Carl Murray, Seyed Gholamali Saddoughi, Abdelkrim Younsi
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Patent number: 7542250Abstract: A motor starter is provided. The motor starter includes micro-electromechanical system switching circuitry. The system may further include solid state switching circuitry coupled in a parallel circuit with the electromechanical switching circuitry, and a controller coupled to the electromechanical switching circuitry and the solid state switching circuitry. The controller may be configured to perform selective switching of a load current from a motor connected to the motor starter. The switching may be performed between the electromechanical switching circuitry and the solid state switching circuitry in response to a load current condition appropriate to an operational capability of a respective one of the switching circuitries.Type: GrantFiled: January 10, 2007Date of Patent: June 2, 2009Assignee: General Electric CompanyInventors: William James Premerlani, Fengfeng Tao, Joshua Isaac Wright, Kanakasabapathi Subramanian, John Norton Park, Robert Joseph Caggiano, David James Lesslie, Brent Charles Kumfer, Charles Stephan Pitzen, Kathleen Ann O'Brien, Edward Keith Howell
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Publication number: 20090108759Abstract: A plasma generation system includes a pulse generator having at least one switch and that is configured to convert a DC voltage to a desired high frequency, high breakdown voltage pulse sufficient to break down a high-breakdown voltage gap, wherein all pulse generator switches are solely low to medium voltage, high frequency switches, and further configured to apply the breakdown voltage to a plasma load for the generation of plasma. In one application, the plasma generation system is useful to manipulate the flow of jets and provide highly efficient acoustic noise reduction.Type: ApplicationFiled: October 25, 2007Publication date: April 30, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Fengfeng Tao, Seyed Gholamali Saddoughi, Robert Carl Murray, Abdelkrim Younsi, Steven Martens
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Publication number: 20090066391Abstract: A high voltage, high speed, and high repetition rate pulse generator solves the high pulse repetition rate limitations associated with RF power amplifiers. The pulse generator employs resonant techniques to provide current limiting features that allow for continued high voltage, high speed, and high repetition pulse rate operation of the pulse generator without impairment of the pulse generator during both short circuit and open circuit load conditions.Type: ApplicationFiled: September 6, 2007Publication date: March 12, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Fengfeng Tao, Frank Jakob John Mueller, Robert Carl Murray, Abdelkrim Younsi, Seyed Gholamali Saddoughi, Joseph Taher Mossoba, John Stanley Glaser
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Publication number: 20080285716Abstract: A system and method to improve the high voltage performance of an x-ray tube with electrostatic deflection of an electron beam focal spot. The system and method provides protection of bias circuits from high voltage transients and spit protection in x-ray tubes through the use of a high voltage transient suppression and spit protection circuit assembly coupled between the bias circuits of a high voltage generator and an x-ray tube vacuum housing of an x-ray generation system.Type: ApplicationFiled: May 14, 2007Publication date: November 20, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Liang Tang, Philippe Ernest, Georges-William Baptiste, Fengfeng Tao
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Publication number: 20080258600Abstract: A high-frequency, high-voltage electron switch includes an electron source, a steering mechanism, a mask or anode plate, and a target. The electron source produces a beam of electrons with a voltage of at least about 1 kV that impinges upon the anode plate. The steering mechanism scans the electron beam across the anode plate at a scanning frequency of at least about 10 MHz. A hole or aperture is provided in the anode plate that allows the electron beam to pass through and produce a pulsed, high-voltage current in the target with a very high-frequency repetition rate and a very fast rise time. The pulsed, high-voltage current produced in the target can be used to cause a high-voltage source to turn on and off.Type: ApplicationFiled: April 17, 2007Publication date: October 23, 2008Applicant: General Electric CompanyInventors: Robert Carl Murray, Karim Younsi, Fengfeng Tao, Seyed Gholamali Saddoughi
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Publication number: 20080165457Abstract: A motor starter is provided. The motor starter includes micro-electromechanical system switching circuitry. The system may further include solid state switching circuitry coupled in a parallel circuit with the electromechanical switching circuitry, and a controller coupled to the electromechanical switching circuitry and the solid state switching circuitry. The controller may be configured to perform selective switching of a load current from a motor connected to the motor starter. The switching may be performed between the electromechanical switching circuitry and the solid state switching circuitry in response to a load current condition appropriate to an operational capability of a respective one of the switching circuitries.Type: ApplicationFiled: January 10, 2007Publication date: July 10, 2008Inventors: William James Premerlani, Fengfeng Tao, Joshua Isaac Wright, Kanakasabapathi Subramanian, John Norton Park, Robert Joseph Caggiano, David James Lesslie, Brent Charles Kumfer, Charles Stephan Pitzen, Kathleen Ann O'Brien, Edward Keith Howell
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Patent number: 6696803Abstract: A simplified electronic ballast for a discharge lamp which provides dimming by control of inverter frequency through modulation of magnetizing current in a transformer such that the switching frequency is made substantially independent of the load presented. The principle of frequency control in a manner independent of the load is extendable to other types of loads and power supplies and converters to regulate power coupled to the load. Clamping capacitors are used to replace other clamping circuits in order to allow current injection to be controlled by a simple variable voltage while frequency control by current injection provides enhanced circuit performance.Type: GrantFiled: December 14, 2001Date of Patent: February 24, 2004Assignee: Virginia Tech Intellectual Properties, Inc.Inventors: Fengfeng Tao, Fred C. Lee
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Publication number: 20020113556Abstract: A simplified electronic ballast for a discharge lamp which provides dimming by control of inverter frequency through modulation of magnetizing current in a transformer such that the switching frequency is made substantially independent of the load presented. The principle of frequency control in a manner independent of the load is extendable to other types of loads and power supplies and converters to regulate power coupled to the load. Clamping capacitors are used to replace other clamping circuits in order to allow current injection to be controlled by a simple variable voltage while frequency control by current injection provides enhanced circuit performance.Type: ApplicationFiled: December 14, 2001Publication date: August 22, 2002Applicant: VTIPInventors: Fengfeng Tao, Fred C. Lee