Patents by Inventor Ashraf Said Atalla
Ashraf Said Atalla 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: 11969701Abstract: The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.Type: GrantFiled: November 28, 2020Date of Patent: April 30, 2024Assignee: Global Life Sciences Solutions USA LLCInventors: James Pellegrino Alexander, Klaus Gebauer, David Allan Torrey, Ashraf Said Atalla, Sima Didari, Richard Lee Damren
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Patent number: 11097236Abstract: The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.Type: GrantFiled: March 8, 2017Date of Patent: August 24, 2021Assignee: GLOBAL LIFE SCIENCES SOLUTIONS USA LLCInventors: James Pellegrino Alexander, Klaus Gebauer, David Allan Torrey, Ashraf Said Atalla, Sima Didari, Richard Lee Damren
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Publication number: 20210077961Abstract: The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.Type: ApplicationFiled: November 28, 2020Publication date: March 18, 2021Inventors: JAMES PELLEGRINO ALEXANDER, KLAUS GEBAUER, DAVID ALLAN TORREY, ASHRAF SAID ATALLA, SIMA DIDARI, RICHARD LEE DAMREN
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Patent number: 10682618Abstract: Embodiments of the method disclosed regard use of a torque sensor (e.g., transducer) and using the measured torque to detect the different fluid and mixing properties, conditions, and abnormalities in a mixing process. The torque produced in the mixing process relates to different fluid properties such as viscosity and density. It also relates to different mixing conditions such as presence of obstacles and changes or issues with gas sparging. Moreover, torque measurements enable determination of power transmitted to fluid by actual measurement, in contrast to using solely empirical impeller power number and speed, and allowing for actual mass transfer determination (i.e., gas transfer calculations).Type: GrantFiled: May 27, 2016Date of Patent: June 16, 2020Inventors: Ashraf Said Atalla, Klaus Gebauer, Sima Didari
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Patent number: 10583409Abstract: The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.Type: GrantFiled: March 31, 2016Date of Patent: March 10, 2020Assignee: GENERAL ELECTRIC COMPANYInventors: Ashraf Said Atalla, Klaus Gebauer, James Pellegrino Alexander, David Allan Torrey
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Publication number: 20190282980Abstract: The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.Type: ApplicationFiled: March 8, 2017Publication date: September 19, 2019Applicant: GENERAL ELECTRIC COMPANYInventors: JAMES PELLEGRINO ALEXANDER, KLAUS GEBAUER, DAVID ALLAN TORREY, ASHRAF SAID ATALLA, SIMA DIDARI, RICHARD LEE DAMREN
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Patent number: 10338029Abstract: A system and method for monitoring a subject are presented. The system includes a sensing device including at least one magnetic source to generate a magnetic field and an array of magnetic sensors disposed within the magnetic field. The sensor array obtains a plurality of magnetic field measurements at a plurality of locations along a vessel carrying a fluid including one or more magnetic particles. Further, the system includes a processing subsystem communicatively coupled to the sensing device, where the processing subsystem determines variations in the measurements caused by magnetization-relaxation of the magnetic particles based on a coupled model that defines behavior of the fluid in the varying magnetic field based on principles of magnetization-relaxation, bulk motion of the magnetic particles towards a determined gradient of the magnetic field, magnetostatics, and conservation of momentum. The processing subsystem estimates values of one or more desired parameters based on the determined variations.Type: GrantFiled: December 10, 2014Date of Patent: July 2, 2019Assignee: GENERAL ELECTRIC COMPANYInventors: Kaustubh Ravindra Nagarkar, Jeffrey Michael Ashe, William Hullinger Huber, Aaron Judy Couture, Ashraf Said Atalla
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Patent number: 10335750Abstract: The system and method of the invention pertains to use of a back iron on one or both ends of the impeller to increase the magnetic field density, and thus strengthen the magnetic coupling. In addition, pie-shaped (i.e. wedge) magnets, or variations thereof, increase the utilization volume and hence provide higher torque to allow the use of less expensive material (e.g. ferrites). In another embodiment, the rotor side is constructed with a Halbach array which increases the torque without the need to add a back iron piece. In another embodiment, an axial flux stator is implemented to replace the drive-end magnets and the drive motor.Type: GrantFiled: March 31, 2016Date of Patent: July 2, 2019Assignee: General Electric CompanyInventors: Ashraf Said Atalla, Klaus Gebauer, Richard Lee Damren, David Allan Torrey, Sima Didari
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Patent number: 10256732Abstract: A medium voltage direct current (MVDC) collector system for renewable power generation facilities includes at least one renewable energy generation device. The MVDC collector system also includes at least one direct current (DC)-to-DC (DC/DC) power converter coupled to the at least one renewable energy generation device. The at least one DC/DC power converter is configured to shift a switching operation of the DC/DC power converter between full-wave conversion and half-wave conversion. The MVDC collector system further includes at least one controller coupled to the at least one DC/DC power converter. The at least one controller is configured to regulate shifting the switching operation of the at least one DC/DC power converter between full-wave conversion and half-wave conversion.Type: GrantFiled: October 16, 2015Date of Patent: April 9, 2019Assignee: General Electric CompanyInventors: Rui Zhou, Luis Jose Garces, Ravisekhar Nadimpalli Raju, Ashraf Said Atalla
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Publication number: 20170341043Abstract: Embodiments of the method disclosed regard use of a torque sensor (e.g., transducer) and using the measured torque to detect the different fluid and mixing properties, conditions, and abnormalities in a mixing process. The torque produced in the mixing process relates to different fluid properties such as viscosity and density. It also relates to different mixing conditions such as presence of obstacles and changes or issues with gas sparging. Moreover, torque measurements enable determination of power transmitted to fluid by actual measurement, in contrast to using solely empirical impeller power number and speed, and allowing for actual mass transfer determination (i.e., gas transfer calculations).Type: ApplicationFiled: May 27, 2016Publication date: November 30, 2017Inventors: Ashraf Said Atalla, Klaus Gebauer, Sima Didari
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Publication number: 20170282137Abstract: The system and method of the invention pertains to use of a back iron on one or both ends of the impeller to increase the magnetic field density, and thus strengthen the magnetic coupling. In addition, pie-shaped (i.e. wedge) magnets, or variations thereof, increase the utilization volume and hence provide higher torque to allow the use of less expensive material (e.g. ferrites). In another embodiment, the rotor side is constructed with a Halbach array which increases the torque without the need to add a back iron piece. In another embodiment, an axial flux stator is implemented to replace the drive-end magnets and the drive motor.Type: ApplicationFiled: March 31, 2016Publication date: October 5, 2017Inventors: Ashraf Said Atalla, Klaus Gebauer, Richard Lee Damren, David Allan Torrey, Sima Didari
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Publication number: 20170282138Abstract: The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.Type: ApplicationFiled: March 31, 2016Publication date: October 5, 2017Inventors: Ashraf Said Atalla, Klaus Gebauer, James Pellegrino Alexander, David Allan Torrey
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Patent number: 9680344Abstract: An electrical machine is provided. The electrical machine includes a stator, a rotor, and a plurality of switches. The stator includes main windings and auxiliary windings. The rotor is couplable to a prime mover configured to turn the rotor relative to the stator to generate at least six phases of alternating current (AC) power at the main windings. The plurality of switches is respectively coupled between the auxiliary windings and groups of the main windings. The plurality of switches is configured to convert the at least six phases to three phases when the plurality of switches is closed.Type: GrantFiled: November 13, 2015Date of Patent: June 13, 2017Assignee: General Electric CompanyInventors: Ashraf Said Atalla, Manoj Ramprasad Shah, Satish Prabhakaran, James Pellegrino Alexander
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Publication number: 20170141633Abstract: An electrical machine is provided. The electrical machine includes a stator, a rotor, and a plurality of switches. The stator includes main windings and auxiliary windings. The rotor is couplable to a prime mover configured to turn the rotor relative to the stator to generate at least six phases of alternating current (AC) power at the main windings. The plurality of switches is respectively coupled between the auxiliary windings and groups of the main windings. The plurality of switches is configured to convert the at least six phases to three phases when the plurality of switches is closed.Type: ApplicationFiled: November 13, 2015Publication date: May 18, 2017Inventors: Ashraf Said Atalla, Manoj Ramprasad Shah, Satish Prabhakaran, James Pellegrino Alexander
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Publication number: 20170110969Abstract: A medium voltage direct current (MVDC) collector system for renewable power generation facilities includes at least one renewable energy generation device. The MVDC collector system also includes at least one direct current (DC)-to-DC (DC/DC) power converter coupled to the at least one renewable energy generation device. The at least one DC/DC power converter is configured to shift a switching operation of the DC/DC power converter between full-wave conversion and half-wave conversion. The MVDC collector system further includes at least one controller coupled to the at least one DC/DC power converter. The at least one controller is configured to regulate shifting the switching operation of the at least one DC/DC power converter between full-wave conversion and half-wave conversion.Type: ApplicationFiled: October 16, 2015Publication date: April 20, 2017Inventors: Rui Zhou, Luis Jose Garces, Ravisekhar Nadimpalli Raju, Ashraf Said Atalla
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Publication number: 20160169838Abstract: A system and method for monitoring a subject are presented. The system includes a sensing device including at least one magnetic source to generate a magnetic field and an array of magnetic sensors disposed within the magnetic field. The sensor array obtains a plurality of magnetic field measurements at a plurality of locations along a vessel carrying a fluid including one or more magnetic particles. Further, the system includes a processing subsystem communicatively coupled to the sensing device, where the processing subsystem determines variations in the measurements caused by magnetization-relaxation of the magnetic particles based on a coupled model that defines behavior of the fluid in the varying magnetic field based on principles of magnetization-relaxation, bulk motion of the magnetic particles towards a determined gradient of the magnetic field, magnetostatics, and conservation of momentum. The processing subsystem estimates values of one or more desired parameters based on the determined variations.Type: ApplicationFiled: December 10, 2014Publication date: June 16, 2016Inventors: Kaustubh Ravindra Nagarkar, Jeffrey Michael Ashe, William Hullinger Huber, Aaron Judy Couture, Ashraf Said Atalla