Patents by Inventor Sameh Ramadan Salem
Sameh Ramadan Salem 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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Patent number: 8143899Abstract: A method of detecting partial discharge associated with at least a portion of an electrical system, wherein the electrical system includes at least one electrical machine electrically coupled within the electrical system, includes generating an electromagnetic field within the electrical machine. The method also includes collecting partial discharge data from at least a portion of the electrical system. The method further includes determining a first partial discharge inception voltage (PDIV) value of at least a portion of partial discharge activity within the electrical system. The method also includes generating at least one trending comparison of the first PDIV value and at least one second PDIV value of at least a portion of partial discharge activity within the electrical system. The method further includes outputting the results.Type: GrantFiled: April 1, 2008Date of Patent: March 27, 2012Assignee: General Electric CompanyInventors: Abdelkrim Younsi, Ronald Irving Longwell, Sameh Ramadan Salem, Yingneng Zhou
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Patent number: 7880473Abstract: System and methods for monitoring electric machines are provided. A magnetic field associated with the electric machine is measured at one or more points external to the electric machine, wherein a respective magnetic field value is associated with each of the one or more points. The one or more measured magnetic field values are compared to one or more corresponding expected values, and a determination of whether a fault is present in the electric machine is made based at least in part on the comparison.Type: GrantFiled: March 31, 2008Date of Patent: February 1, 2011Assignee: General Electric CompanyInventors: Madabushi Venkatakrishnama Chari, Sameh Ramadan Salem, Sheppard Salon, O-Mun Kwon
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Patent number: 7676333Abstract: A method of analyzing partial discharge data collected from an electrical device includes collecting partial discharge data from a first electrical device belonging to a group of electrical devices. The group of electrical devices is at least partially defined by at least one electrical device classification. The method also includes generating a comparison of at least a portion of the partial discharge data collected from the first electrical device with at least a portion of the partial discharge data collected from at least one second electrical device. The at least one second electrical device is selected from the group of electrical devices that includes the first electrical device. The method further includes transmitting the results.Type: GrantFiled: November 6, 2007Date of Patent: March 9, 2010Assignee: General Electric CompanyInventors: Abdelkrim Younsi, Sameh Ramadan Salem, Weizhong Yan, Gian Carlo Montanari
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Publication number: 20090243647Abstract: System and methods for monitoring electric machines are provided. A magnetic field associated with the electric machine is measured at one or more points external to the electric machine, wherein a respective magnetic field value is associated with each of the one or more points. The one or more measured magnetic field values are compared to one or more corresponding expected values, and a determination of whether a fault is present in the electric machine is made based at least in part on the comparison.Type: ApplicationFiled: March 31, 2008Publication date: October 1, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Madabushi Venkatakrishnama Chari, Sameh Ramadan Salem, Sheppard Salon, O-Mun Kwon
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Publication number: 20090248328Abstract: A method of detecting partial discharge associated with at least a portion of an electrical system, wherein the electrical system includes at least one electrical machine electrically coupled within the electrical system, includes generating an electromagnetic field within the electrical machine. The method also includes collecting partial discharge data from at least a portion of the electrical system. The method further includes determining a first partial discharge inception voltage (PDIV) value of at least a portion of partial discharge activity within the electrical system. The method also includes generating at least one trending comparison of the first PDIV value and at least one second PDIV value of at least a portion of partial discharge activity within the electrical system. The method further includes outputting the results.Type: ApplicationFiled: April 1, 2008Publication date: October 1, 2009Inventors: Abdelkrim Younsi, Ronald Irving Longwell, Sameh Ramadan Salem, Yingneng Zhou
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Publication number: 20090245717Abstract: Disclosed is a system for measuring stator wedge tightness in a stator core of an electric machine. The system includes at least one sensor located along at least one component disposed in a stator slot of the stator core. The at least one sensor is located and configured to measure strain in the component. The system further includes a data acquisition system operably coupled to the at least one sensor. A method for measuring stator wedge tightness in a stator core of an electric machine includes arranging at least one sensor along at least one component of the stator core, the at least one sensor being located and configured to measure strain in the component, and interrogating the at least one sensor utilizing a data acquisition system.Type: ApplicationFiled: March 27, 2008Publication date: October 1, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Alan Michael Iversen, Sameh Ramadan Salem, Joseph Alan Worden, Anthony Rigosu, Ronald Irving Longwell, Adrian Matthew Breitenstein, JR.
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Publication number: 20090232183Abstract: A system and method to measure a characteristic of a component of an electric machine. The system includes an optical fiber disposed proximate to the component, at least one sensor, disposed along the optical fiber, to detect the temperature of the component, and a data acquisition system operably coupled to the sensor via the optical fiber to generate real-time data in accordance with the detected temperature of the component during an operation of the electric machines.Type: ApplicationFiled: March 13, 2008Publication date: September 17, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Sameh Ramadan Salem, Alan Michael Iversen, Ronald Irving Longwell, Adrian Matthew Breitenstein, JR., Lawrence Lee Sowers
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Publication number: 20090219030Abstract: Embodiments of the invention can include methods and systems for detecting rotor field ground faults in rotating machinery. In one embodiment, a system can include a rotor of the rotating machine comprising a plurality of field windings substantially disposed therein and a stator of the rotating machine comprising a plurality of stator windings substantially disposed therein, with an air gap existing between the rotor and the stator. The system can include a high-impedance grounding circuit at least temporarily connected between the rotor and a ground. Additionally, the system can include an air gap flux probe positioned at least temporarily between the rotor and the stator for measuring a magnetic flux density generated in the air gap during operation of the rotating machine. Finally, the system can further include an analyzer in electrical communication with the air gap flux probe for receiving an output of the air gap flux probe.Type: ApplicationFiled: February 29, 2008Publication date: September 3, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Sameh Ramadan Salem, Sheppard Salon, Madabushi Venkatakrishnama Chari, O-Mun Kwon
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Patent number: 7579843Abstract: Methods and apparatus for analyzing electrical insulation of an electrical machine are provided. The method includes receiving a first signal that includes a plurality of partial discharge pulses from the electrical machine and a plurality of noise pulses, receiving other signals that includes information relative to at least one process parameter associated with the electrical machine, determining the plurality of partial discharge pulses from the plurality of noise pulses, identifying characteristics of the plurality of partial discharge pulses relating to the location and character of partial discharges in the electrical machine, and determining a condition of the electrical insulation using the identified characteristics and the received information relative to at least one process parameter.Type: GrantFiled: October 13, 2006Date of Patent: August 25, 2009Assignee: General Electric CompanyInventors: Abdelkrim Younsi, Sameh Ramadan Salem
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Publication number: 20090119035Abstract: A method of analyzing partial discharge data collected from an electrical device includes collecting partial discharge data from a first electrical device belonging to a group of electrical devices. The group of electrical devices is at least partially defined by at least one electrical device classification. The method also includes generating a comparison of at least a portion of the partial discharge data collected from the first electrical device with at least a portion of the partial discharge data collected from at least one second electrical device. The at least one second electrical device is selected from the group of electrical devices that includes the first electrical device. The method further includes transmitting the results.Type: ApplicationFiled: November 6, 2007Publication date: May 7, 2009Inventors: Abdelkrim Younsi, Sameh Ramadan Salem, Weizhong Yan, Gian Carlo Montanari
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Patent number: 7508119Abstract: A multifunction sensor system for an electrical machine includes a piezoelectric vibration sensor a resistive temperature and partial discharge sensor which may optionally be integral with the piezoelectric vibration sensor; and packaging enclosing the vibration, the resistive temperature, and the partial discharge sensors.Type: GrantFiled: June 22, 2006Date of Patent: March 24, 2009Assignee: General Electric CompanyInventors: Karim Abdelkrim Younsi, Charles Erklin Seeley, Sameh Ramadan Salem
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Publication number: 20080088314Abstract: Methods and apparatus for analyzing electrical insulation of an electrical machine are provided. The method includes receiving a first signal that includes a plurality of partial discharge pulses from the electrical machine and a plurality of noise pulses, receiving other signals that includes information relative to at least one process parameter associated with the electrical machine, determining the plurality of partial discharge pulses from the plurality of noise pulses, identifying characteristics of the plurality of partial discharge pulses relating to the location and character of partial discharges in the electrical machine, and determining a condition of the electrical insulation using the identified characteristics and the received information relative to at least one process parameter.Type: ApplicationFiled: October 13, 2006Publication date: April 17, 2008Inventors: Abdelkrim Younsi, Sameh Ramadan Salem
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Publication number: 20070296309Abstract: A multifunction sensor system for an electrical machine includes a piezoelectric vibration sensor a resistive temperature and partial discharge sensor which may optionally be integral with the piezoelectric vibration sensor; and packaging enclosing the vibration, the resistive temperature, and the partial discharge sensors.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Applicant: General Electric CompanyInventors: Karim Abdelkrim Younsi, Charles Erklin Seeley, Sameh Ramadan Salem
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Patent number: 7113899Abstract: Keybar voltages in electric machines are reduced by electromagnetically optimizing the positioning of the keybars with respect to stator winding phase belts, the selection of the number of keybars, the selection of the number of stator slots, and/or the direction of rotation of a rotor with respect to the stator.Type: GrantFiled: May 1, 2001Date of Patent: September 26, 2006Assignee: General Electric CompanyInventors: Manoj Ramprasad Shah, Sameh Ramadan Salem
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Patent number: 7057324Abstract: The invention involves orienting the metal laminations that form a stator core end in such a way so as to reduce eddy current losses in the finger portions of the metal laminations. The metal laminations are positioned so that the grain orientation is parallel to the magnetic flux lines generated in the finger portions.Type: GrantFiled: December 19, 2002Date of Patent: June 6, 2006Assignee: General Electric CompanyInventors: Jeffrey M. Breznak, Sameh Ramadan Salem
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Publication number: 20040119365Abstract: The invention involves orienting the metal laminations that form a stator core end in such a way so as to reduce eddy current losses in the finger portions of the metal laminations. The metal laminations are positioned so that the grain orientation is parallel to the magnetic flux lines generated in the finger portions.Type: ApplicationFiled: December 19, 2002Publication date: June 24, 2004Inventors: Jeffrey M. Breznak, Sameh Ramadan Salem
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Patent number: 6713930Abstract: A power generator that operates at a reduced temperature level includes a flux shunt that reduces the amount of fringing magnetic flux axially impinging upon a stator, flange, and multiple keybars during operation of the generator. By reducing the amount of axially impinging flux, the flux shunt reduces an operating temperature of the stator and flange and reduces a voltage differential between keybar voltages induced by the flux in the multiple keybars.Type: GrantFiled: April 29, 2003Date of Patent: March 30, 2004Assignee: General Electric CompanyInventors: Manoj Ramprasad Shah, Sameh Ramadan Salem, Ronald Irving Longwell
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Publication number: 20030201689Abstract: A power generator that operates at a reduced temperature level includes a flux shunt that reduces the amount of fringing magnetic flux axially impinging upon a stator, flange, and multiple keybars during operation of the generator. By reducing the amount of axially impinging flux, the flux shunt reduces an operating temperature of the stator and flange and reduces a voltage differential between keybar voltages induced by the flux in the multiple keybars.Type: ApplicationFiled: April 29, 2003Publication date: October 30, 2003Applicant: General Electric CompanyInventors: Manoj Ramprasad Shah, Sameh Ramadan Salem, Ronald Irving Longwell
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Patent number: 6608419Abstract: A power generator that operates at a reduced temperature level includes a flux shunt that reduces the amount of fringing magnetic flux axially impinging upon a stator, flange, and multiple keybars during operation of the generator. By reducing the amount of axially impinging flux, the flux shunt reduces an operating temperature of the stator and flange and reduces a voltage differential between keybar voltages induced by the flux in the multiple keybars.Type: GrantFiled: December 27, 2000Date of Patent: August 19, 2003Assignee: General Electric CompanyInventors: Manoj Ramprasad Shah, Sameh Ramadan Salem, Ronald Irving Longwell
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Patent number: 6525444Abstract: A stator core-end of an electric generator utilizes amorphous metal laminate packages to reduce eddy currents and heating in the stator core thereby increasing generator capacity. The packages are formed as complete units before installation into the stator core. The amorphous metal laminate packages comprise alternating layers of amorphous metal laminates and non-amorphous metal laminates.Type: GrantFiled: May 16, 2001Date of Patent: February 25, 2003Assignee: General Electric CompanyInventors: Sameh Ramadan Salem, Ronald Irving Longwell, Manoj Ramprasad Shah