Patents by Inventor Manoj Ramprasad Shah
Manoj Ramprasad Shah 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: 8410656Abstract: An electric machine and stator assembly are provided that include a continuous stator portion having stator teeth, and a tooth tip portion including tooth tips corresponding to the stator teeth of the continuous stator portion, respectively. The tooth tip portion is mounted onto the continuous stator portion.Type: GrantFiled: October 30, 2009Date of Patent: April 2, 2013Assignee: General Electric CompanyInventors: Murtuza Lokhandwalla, James Pellegrino Alexander, Ayman Mohamed Fawzi El-Refaie, Manoj Ramprasad Shah, Owen Scott Quirion
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Publication number: 20130049733Abstract: A method of detecting faults in a wind turbine generator based on current signature analysis is disclosed herein. The method includes acquiring a set of electrical signals representative of an operating condition of a generator. Further, the electrical signals are processed to generate a normalized spectrum of electrical signals. A fault related to a gearbox or bearing or any other component associated with the generator is detected based on analyzing the current spectrum.Type: ApplicationFiled: August 29, 2011Publication date: February 28, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Prabhakar Neti, Manoj Ramprasad Shah, Karim Younsi, Mayank Tiwari, Pinjia Zhang
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Publication number: 20130049513Abstract: A permanent magnet machine includes a stator having a stator core, a plurality of stator teeth and plurality of stator windings coupled to the stator core. The stator is configured to generate a stator magnetic rotating field when the stator windings are excited with an electric current. The stator magnetic rotating field includes both synchronous sub-harmonic and super-harmonic components. The permanent magnet machine also includes a rotor that is disposed within the stator. The rotor includes a rotor core and a plurality of rotor magnets that are coupled to the rotor core. The rotor magnets are further configured to have a predefined orientation profile such that when the stator windings are excited with an electric current, sub-harmonic and super-harmonic magnetic rotating fields are generated in the rotor magnetic field.Type: ApplicationFiled: August 30, 2011Publication date: February 28, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Ayman Mohamed Fawzi EL-Refaie, James Pellegrino Alexander, Patel Bhageerath Reddy, Manoj Ramprasad Shah
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Publication number: 20130002064Abstract: An apparatus, such as an electrical machine, is provided. The apparatus can include a rotor defining a rotor bore and a conduit disposed in and extending axially along the rotor bore. The conduit can have an annular conduit body defining a plurality of orifices disposed axially along the conduit and extending through the conduit body. The rotor can have an inner wall that at least partially defines the rotor bore. The orifices can extend through the conduit body along respective orifice directions, and the rotor and conduit can be configured to provide a line of sight along the orifice direction from the respective orifices to the inner wall.Type: ApplicationFiled: June 29, 2011Publication date: January 3, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Hendrik Pieter Jacobus De Bock, James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, William Dwight Gerstler, Manoj Ramprasad Shah, Xiaochun Shen
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Publication number: 20120282120Abstract: In accordance with one aspect of the present invention, an electric motor is provided that includes a housing, a stator, and a rotor, wherein the stator and rotor are disposed within the housing. The housing, the stator, and the rotor define an internal volume within the housing, said internal volume configured to receive a dielectric fluid. The electric motor further includes at least one electric cable configured to electrically power the electric motor, wherein the electric cable includes at least one electrical conductor disposed within at least one protective layer, and wherein the electrical conductor and the protective layer define at least one channel configured to deliver the dielectric fluid to the internal volume. An electric submersible pump system is also provided.Type: ApplicationFiled: May 2, 2011Publication date: November 8, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: John Raymond Krahn, Weijun Yin, Manoj Ramprasad Shah
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Publication number: 20120277926Abstract: A load balancing system includes a transformer having a plurality of integrated sensors. A control system that may be embedded within the transformer is in electrical communication with the plurality of sensors. The control system is configured to estimate or determine the state of health of the transformer. The state of health of the transformer is based upon signals generated via the plurality of sensors. A load request that may be received that is compared to the state of health of the transformer to determine if the transformer can support the load request. The control system determines whether or not the transformer can provide electrical power based upon the estimated state of health of the transformer and in response to the load request.Type: ApplicationFiled: April 29, 2011Publication date: November 1, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Matthew Christian Nielsen, Manoj Ramprasad Shah, Andrew Andre Reid
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Patent number: 8288911Abstract: An electrical machine including a winding made of a conductive material is disclosed. The electrical machine also includes an insulating layer disposed around at least a portion of the winding having a dielectric constant that varies as a function of voltage.Type: GrantFiled: December 15, 2006Date of Patent: October 16, 2012Assignee: General Electric CompanyInventors: Qi Tan, Patricia Chapman Irwin, Manoj Ramprasad Shah, Yang Cao, Abdelkrim Younsi, Michael Francis Ciccarelli, Christina Lea McHugh
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Patent number: 8217644Abstract: A current transformer is provided. The current transformer includes a magnetic core having a central opening, at least one pair of conductors extending through the central opening and positioned symmetrically with respect to a center point of the magnetic core, one or more coils disposed on the magnetic core along a magnetic neutral axis of the magnetic core and one or more coils disposed on the magnetic core along a reference axis, wherein the reference axis is substantially perpendicular to the magnetic neutral axis.Type: GrantFiled: July 9, 2009Date of Patent: July 10, 2012Assignee: General Electric CompanyInventors: Karim Younsi, Prabhakar Neti, Manoj Ramprasad Shah, Yingneng Zhou, Charles David Whitefield, II
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Publication number: 20120161570Abstract: An electric motor is configured with a stator core assembly that includes a stator core having a plurality of winding slots. A plurality of stator windings pass through the plurality of winding slots that include slot liners configured to provide electrostatic shields surrounding the plurality of stator windings.Type: ApplicationFiled: December 23, 2010Publication date: June 28, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Michael Joseph Schutten, Manoj Ramprasad Shah, Satish Prabhakaran, Robert James Thomas
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Publication number: 20110315257Abstract: A valve system for pressure exchanger tubes of an energy recovery system is provided. The valve system includes a valve housing, a flow distributor, a hollow spool and a sealing system. The valve housing may comprise a set of high-pressure ports and a set of low-pressure ports. The flow distributor allows the flow to and from the set of high-pressure ports and the set of low-pressure ports within the valve housing. The hollow spool may be configured to reciprocate axially in a radial clearance between the valve housing and the flow distributor. The hollow spool may connect the pressure exchanger tube in fluid communication with the high-pressure ports or the low-pressure ports. The sealing system may be provided within the valve housing for imparting substantial hydraulic balance to the hollow spool.Type: ApplicationFiled: June 23, 2010Publication date: December 29, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Todd Alan Anderson, Manoj Ramprasad Shah, Philip Paul Beauchamp, Rammohan Rao Kalluri, Suma Memana Narayana Bhat, Hareesh Kumar Reddy Kommepalli
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Patent number: 8018110Abstract: An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft.Type: GrantFiled: April 30, 2009Date of Patent: September 13, 2011Assignee: General Electric CompanyInventors: James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, Murtuza Lokhandwalla, Manoj Ramprasad Shah, Jeremy Daniel VanDam
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Patent number: 8004140Abstract: An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft.Type: GrantFiled: April 30, 2009Date of Patent: August 23, 2011Assignee: General Electric CompanyInventors: James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, Murtuza Lokhandwalla, Manoj Ramprasad Shah, Jeremy Daniel VanDam
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Publication number: 20110101818Abstract: An electric machine and stator assembly are provided that include a continuous stator portion having stator teeth, and a tooth tip portion including tooth tips corresponding to the stator teeth of the continuous stator portion, respectively. The tooth tip portion is mounted onto the continuous stator portion.Type: ApplicationFiled: October 30, 2009Publication date: May 5, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Murtuza Lokhandwalla, James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, Manoj Ramprasad Shah, Owen Scott Quirion
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Publication number: 20110031826Abstract: A permanent magnet machine is disclosed. The permanent magnet machine includes a stator, and a rotor comprising a rotor core and disposed outside and concentric with the stator, wherein the rotor core comprises a contiguous volume disposed around a plurality of permanent magnets, wherein the contiguous volume simultaneously supports a magnetic flux generated by the permanent magnets and provides mechanical support and containment for the permanent magnets, during operation of the permanent magnet machine. A rotor for a permanent magnet electric machine is also disclosed.Type: ApplicationFiled: August 6, 2009Publication date: February 10, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: James William Bray, Manoj Ramprasad Shah, Jeremy Daniel VanDam
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Publication number: 20110006802Abstract: A current transformer is provided. The current transformer comprises a magnetic core having a central opening, at least one pair of conductors extending through the central opening and positioned symmetrically with respect to a center point of the magnetic core, one or more coils disposed on the magnetic core along a magnetic neutral axis of the magnetic core and one or more coils disposed on the magnetic core along a reference axis, wherein the reference axis is substantially perpendicular to the magnetic neutral axis.Type: ApplicationFiled: July 9, 2009Publication date: January 13, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Karim Younsi, Prabhakar Neti, Manoj Ramprasad Shah, Yingneng Zhou, Charles David Whitefield, II
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Publication number: 20110006755Abstract: A current transformer is provided. The current transformer comprises an inner magnetic core having a central opening, an outer sense core circumscribing the inner magnetic core, at least one pair of conductors extending through the central opening and positioned symmetrically with respect to a center point of the inner magnetic core, and one or more coils disposed on the inner magnetic core, the outer sense core, or both, in a magnetically balanced configuration relative to a magnetic neutral axis of the inner magnetic core.Type: ApplicationFiled: July 9, 2009Publication date: January 13, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Karim Younsi, Prabhakar Neti, Manoj Ramprasad Shah, Yingneng Zhou, Charles David Whitefield, II
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Publication number: 20100277017Abstract: An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft. The rotor assembly further includes multiple pair of permanent magnets for generating a magnetic field, which magnetic field interacts with the stator magnetic field to produce a torque.Type: ApplicationFiled: April 30, 2009Publication date: November 4, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, Murtuza Lokhandwalla, Manoj Ramprasad Shah, Jeremy Daniel VanDam
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Publication number: 20100277028Abstract: An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft.Type: ApplicationFiled: April 30, 2009Publication date: November 4, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie, Murtuza Lokhandwalla, Manoj Ramprasad Shah, Jeremy Daniel VanDam
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Publication number: 20100237723Abstract: A cooling system for an electrical machine is provided. The cooling system includes at least one baffle enclosing multiple endwindings, wherein the at least one baffle is configured to guide a cooling fluid flow to multiple regions of interest in the machine.Type: ApplicationFiled: March 19, 2009Publication date: September 23, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: William Dwight Gerstler, Manoj Ramprasad Shah, Hendrik Pieter Jacobus de Bock, Jeremy Daniel Van Dam, Ayman Mohamed Fawzi EL-Refaie
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Patent number: 7791235Abstract: A system for transferring torque between a pair of independently, concurrently rotating shafts of a turbofan engine includes a magnetic gearbox. The magnetic gearbox has a first ring structure, a second ring structure and an intermediate ring structure. Each ring structure has an annular aperture therethrough and a plurality of permanent magnets embedded therein. The intermediate ring structure is disposed between the first and the second ring structures. Each ring structure is coaxially concentric with, and independently rotatable with respect to the remaining ring structures. The first and second ring structures are each coupled to separate ones of the rotating engine shafts, and the intermediate ring is operable to transfer torque between the pair of shafts. Preferably, the intermediate ring structure is coupled to a rotating machine. The rotating machine has a controller, and is operable for adjusting a ratio of torque transferred between the pair of shafts.Type: GrantFiled: December 22, 2006Date of Patent: September 7, 2010Assignee: General Electric CompanyInventors: John M. Kern, Juan M. De Bedout, Kiyoung Chung, Michal-Wolfgang Waszak, Manoj Ramprasad Shah, Peter D. Toot, Ronghai Qu, Wei Wu