Patents by Inventor Tsarafidy Raminosoa
Tsarafidy Raminosoa 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: 20230353020Abstract: An electric drive system is provided where the inverter may be integrated within the motor. The electric drive system may include an outer rotor and an inner stator, where the inner stator includes an interior space in which circuitry for the electric drive system may be provided.Type: ApplicationFiled: April 29, 2022Publication date: November 2, 2023Inventors: Md S. Chowdhury, Tsarafidy Raminosoa, Burak Ozpineci, Randy H. Wiles, Emre Gurpinar, Gui-Jia Su, Jason L. Pries
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Publication number: 20230327501Abstract: A novel architecture for al motor rotor and stator of an electrical motor device as well as other electromagnetic device using soft magnetic wires and/or strips bundled and shaped to provide a desired magnetic flux path.Type: ApplicationFiled: March 13, 2023Publication date: October 12, 2023Inventors: Jun Cui, Gaoyuan Ouyang, Iver E. Anderson, Matthew Kramer, Tsarafidy Raminosoa
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Publication number: 20210358686Abstract: A system is provided for transferring power between a stator and a rotor of an excitation system. The stator and the rotor may form part of a rotary transformer that includes a primary winding and a secondary winding, where power is transferred from the primary winding to the secondary winding or conversely from the secondary winding to the primary winding.Type: ApplicationFiled: May 12, 2021Publication date: November 18, 2021Inventors: Tsarafidy Raminosoa, Jason L. Pries, Randy H. Wiles, Jonathan P. Wilkins
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Patent number: 10427351Abstract: An apparatus for bending a composite tube that includes an induction coil. Induction coil includes multiple turns and the turn-to-turn spacing changes at least once along the length of the induction coil. There is a heating element positioned near the induction coil and the induction coil is configured to cause the heating element to increase in temperature.Type: GrantFiled: February 19, 2016Date of Patent: October 1, 2019Assignee: General Electric CompanyInventors: Wendy Win-Ling Lin, Gary Scott Reese, Tsarafidy Raminosoa, Nathaniel Benedict Hawes
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Patent number: 10024296Abstract: An electric machine is presented. The electric machine includes a hollow rotor; and a stator disposed within the hollow rotor, the stator defining a flow channel. The hollow rotor includes a first end portion defining a fluid inlet, a second end portion defining a fluid outlet; the fluid inlet, the fluid outlet, and the flow channel of the stator being configured to allow passage of a fluid from the fluid inlet to the fluid outlet via the flow channel; and wherein the hollow rotor is characterized by a largest cross-sectional area of hollow rotor, and wherein the flow channel is characterized by a smallest cross-sectional area of the flow channel, wherein the smallest cross-sectional area of the flow channel is at least about 25% of the largest cross-sectional area of the hollow rotor. An electric fluid pump and a power generation system are also presented.Type: GrantFiled: July 21, 2015Date of Patent: July 17, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Jeremy Daniel Van Dam, Norman Arnold Turnquist, Tsarafidy Raminosoa, Manoj Ramprasad Shah, Xiaochun Shen
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Patent number: 10014751Abstract: A stator assembly that includes a graphite sheet-like element that has fold(s) so as to define at least two planar sections. The face of one of the planar section abuts a surface of a heat generating location(s) of the stator assembly and a face of another planar section abuts one the tooth or the slot bottom of the stator assembly. Also, a subassembly that includes an electrical machine stator assembly that includes a sheet-like element of a material having high thermal conductivity, wherein a portion of the element abuts the end winding(s) such that the sheet-like element conducts heat to the magnetic core, the stator housing, and/or a winding heat conduction element.Type: GrantFiled: May 19, 2015Date of Patent: July 3, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Tsarafidy Raminosoa, Karthik Kumar Bodla, Ayman Mohamed Fawzi El-Refaie, David Allan Torrey
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Publication number: 20170239877Abstract: An apparatus for bending a composite tube that includes an induction coil. Induction coil includes multiple turns and the turn-to-turn spacing changes at least once along the length of the induction coil. There is a heating element positioned near the induction coil and the induction coil is configured to cause the heating element to increase in temperature.Type: ApplicationFiled: February 19, 2016Publication date: August 24, 2017Inventors: Wendy Win-Ling Lin, Gary Scott Reese, Tsarafidy Raminosoa, Nathaniel Benedict Hawes
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Patent number: 9673667Abstract: A permanent magnet electrical machine includes a stator having conductive windings wound thereon and one or more permanent magnets embedded in the stator. A magnetic keeper element is positioned on the stator so as to form a magnetic flux path with the permanent magnets, with the magnetic keeper element closing the magnetic flux path of the permanent magnets by providing a low reluctance flux path to magnetic flux generated by the permanent magnets. A vacuum pressure impregnation (VPI) process is performed on the stator to increase a thermal conductivity of the windings, with the VPI process including a curing step that is performed at a selected temperature. The magnetic keeper element sets an operating point of the permanent magnets to an internal flux density level above a demagnetization threshold associated with the selected temperature at which the curing step is performed.Type: GrantFiled: July 22, 2014Date of Patent: June 6, 2017Assignee: GENERAL ELECTRIC COMPANYInventors: Tsarafidy Raminosoa, James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie
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Patent number: 9601951Abstract: A permanent magnet machine, a rotor assembly for the machine, and a pump assembly. The permanent magnet machine includes a stator assembly including a stator core configured to generate a magnetic field and extending along a longitudinal axis with an inner surface defining a cavity and a rotor assembly including a rotor core and a rotor shaft. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further including a plurality of permanent magnets for generating a magnetic field which interacts with the stator magnetic field to produce torque. The permanent magnets configured as one of internal or surface mounted. The rotor assembly also including a plurality of retaining clips configured to retain the plurality of permanent magnets relative to the rotor core. The pump assembly including an electric submersible pump and a permanent magnet motor for driving the pump.Type: GrantFiled: November 4, 2013Date of Patent: March 21, 2017Assignee: General Electric CompanyInventors: Ken Ivcar Salas Nobrega, Jeremy Daniel Van Dam, Manoj Ramprasad Shah, William Dwight Gerstler, Tsarafidy Raminosoa, Edward John Flett, Patel Bhageerath Reddy, James Pellegrino Alexander
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Publication number: 20170054335Abstract: An electrical machine exhibiting reduced friction and windage losses is disclosed. The electrical machine includes a stator and a rotor assembly configured to rotate relative to the stator, wherein the rotor assembly comprises a rotor core including a plurality of salient rotor poles that are spaced apart from one another around an inner hub such that an interpolar gap is formed between each adjacent pair of salient rotor poles, with an opening being defined by the rotor core in each interpolar gap. Electrically non-conductive and non-magnetic inserts are positioned in the gaps formed between the salient rotor poles, with each of the inserts including a mating feature formed an axially inner edge thereof that is configured to mate with a respective opening being defined by the rotor core, so as to secure the insert to the rotor core against centrifugal force experienced during rotation of the rotor assembly.Type: ApplicationFiled: November 1, 2016Publication date: February 23, 2017Applicant: General Electric CompanyInventors: Tsarafidy Raminosoa, James Pellegrino Alexander, Aymam Mohamed Fawzi EL-Refaie, David A. Torrey
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Patent number: 9520751Abstract: An electrical machine exhibiting reduced friction and windage losses is disclosed. The electrical machine includes a stator and a rotor assembly configured to rotate relative to the stator, wherein the rotor assembly comprises a rotor core including a plurality of salient rotor poles that are spaced apart from one another around an inner hub such that an interpolar gap is formed between each adjacent pair of salient rotor poles, with an opening being defined by the rotor core in each interpolar gap. Electrically non-conductive and non-magnetic inserts are positioned in the gaps formed between the salient rotor poles, with each of the inserts including a mating feature formed an axially inner edge thereof that is configured to mate with a respective opening being defined by the rotor core, so as to secure the insert to the rotor core against centrifugal force experienced during rotation of the rotor assembly.Type: GrantFiled: July 24, 2013Date of Patent: December 13, 2016Assignee: GENERAL ELECTRIC COMPANYInventors: Tsarafidy Raminosoa, James Pellegrino Alexander, Ayman Mohamed Fawzi El-Refaie, David A. Torrey
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Publication number: 20160344264Abstract: A stator assembly that includes a graphite sheet-like element that has fold(s) so as to define at least two planar sections. The face of one of the planar section abuts a surface of a heat generating location(s) of the stator assembly and a face of another planar section abuts one the tooth or the slot bottom of the stator assembly. Also, a subassembly that includes an electrical machine stator assembly that includes a sheet-like element of a material having high thermal conductivity, wherein a portion of the element abuts the end winding(s) such that the sheet-like element conducts heat to the magnetic core, the stator housing, and/or a winding heat conduction element.Type: ApplicationFiled: May 19, 2015Publication date: November 24, 2016Inventors: Tsarafidy RAMINOSOA, Karthik Kumar BODIA, Ayman Mohamed Fawzi EL-REFAIE, David Allan TORREY
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Publication number: 20160118848Abstract: A permanent magnet machine includes a stator configured to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity, a rotor disposed inside said cavity and configured to rotate about the longitudinal axis, and a plurality of permanent magnets for generating a magnetic field, which interacts with the stator magnetic field to produce a torque. At least one of the plurality of permanent magnets has a light rare earth material including neodymium and praseodymium, and less than about 5 weight percent of a heavy rare earth material, wherein the weight percentage of neodymium is larger than the weight percentage of praseodymium but smaller than three times of the weight percentage of praseodymium.Type: ApplicationFiled: October 27, 2015Publication date: April 28, 2016Inventors: Tsarafidy RAMINOSOA, Minglong ZHANG, Ayman Mohamed Fawzi EL-REFAIE, Steven Joseph GALIOTI, Patel Bhageerath REDDY
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Publication number: 20160028276Abstract: A permanent magnet electrical machine includes a stator having conductive windings wound thereon and one or more permanent magnets embedded in the stator. A magnetic keeper element is positioned on the stator so as to form a magnetic flux path with the permanent magnets, with the magnetic keeper element closing the magnetic flux path of the permanent magnets by providing a low reluctance flux path to magnetic flux generated by the permanent magnets. A vacuum pressure impregnation (VPI) process is performed on the stator to increase a thermal conductivity of the windings, with the VPI process including a curing step that is performed at a selected temperature. The magnetic keeper element sets an operating point of the permanent magnets to an internal flux density level above a demagnetization threshold associated with the selected temperature at which the curing step is performed.Type: ApplicationFiled: July 22, 2014Publication date: January 28, 2016Inventors: Tsarafidy Raminosoa, James Pellegrino Alexander, Ayman Mohamed Fawzi EL-Refaie
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Patent number: 9236784Abstract: A flux-switching electric machine includes a rotor having a rotor core that is configured to rotate about a central longitudinal axis. The rotor core has a circumference that includes an approximately constant radius of curvature along an arc length of the rotor core. The rotor core includes magnetic and non-magnetic segments that are arranged in an alternating pattern of magnetic segments and non-magnetic segments along the arc length of the rotor core. The flux-switching electric machine also includes a stator having a stator core that extends a length along the central longitudinal axis. The stator core includes a stator base and stator teeth that extend radially from the stator base relative to the central longitudinal axis. The stator includes a direct current (DC) field coil wound around at least one corresponding stator tooth. The stator includes an alternating current (AC) armature coil wound around at least one corresponding stator tooth.Type: GrantFiled: March 30, 2012Date of Patent: January 12, 2016Assignee: General Electric CompanyInventors: Tsarafidy Raminosoa, Manoj Ramprasad Shah
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Publication number: 20150326074Abstract: An electric machine is presented. The electric machine includes a hollow rotor; and a stator disposed within the hollow rotor, the stator defining a flow channel. The hollow rotor includes a first end portion defining a fluid inlet, a second end portion defining a fluid outlet; the fluid inlet, the fluid outlet, and the flow channel of the stator being configured to allow passage of a fluid from the fluid inlet to the fluid outlet via the flow channel; and wherein the hollow rotor is characterized by a largest cross-sectional area of hollow rotor, and wherein the flow channel is characterized by a smallest cross-sectional area of the flow channel, wherein the smallest cross-sectional area of the flow channel is at least about 25% of the largest cross-sectional area of the hollow rotor. An electric fluid pump and a power generation system are also presented.Type: ApplicationFiled: July 21, 2015Publication date: November 12, 2015Inventors: Jeremy Daniel Van Dam, Norman Arnold Turnquist, Tsarafidy Raminosoa, Manoj Ramprasad Shah, Xiaochun Shen
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Patent number: 9145865Abstract: An electric machine is presented. The electric machine includes a hollow rotor; and a stator disposed within the hollow rotor, the stator defining a flow channel. The hollow rotor includes a first end portion defining a fluid inlet, a second end portion defining a fluid outlet; the fluid inlet, the fluid outlet, and the flow channel of the stator being configured to allow passage of a fluid from the fluid inlet to the fluid outlet via the flow channel; and wherein the hollow rotor is characterized by a largest cross-sectional area of hollow rotor, and wherein the flow channel is characterized by a smallest cross-sectional area of the flow channel, wherein the smallest cross-sectional area of the flow channel is at least about 25% of the largest cross-sectional area of the hollow rotor. An electric fluid pump and a power generation system are also presented.Type: GrantFiled: June 29, 2012Date of Patent: September 29, 2015Assignee: General Electric CompanyInventors: Jeremy Daniel Van Dam, Norman Arnold Turnquist, Tsarafidy Raminosoa, Manoj Ramprasad Shah, Xiaochun Shen
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Patent number: 9041232Abstract: An electric generator system includes a rotatable shaft that is configured to rotate about a central longitudinal axis of the shaft, and a pilot permanent magnet generator (PMG) mounted to the shaft such that the pilot PMG is configured to rotate about the central longitudinal axis with the rotatable shaft. The system includes a wound field flux-switching electric machine having a rotor and a stator. The rotor is mounted to the shaft such that the rotor is configured to rotate about the central longitudinal axis with the shaft. The stator includes both a direct current (DC) field coil and an alternating current (AC) armature coil. The DC field coil is operatively connected to the pilot PMG for exciting the DC field coil.Type: GrantFiled: October 11, 2013Date of Patent: May 26, 2015Assignee: General Electric CompanyInventors: Manoj Ramprasad Shah, Tsarafidy Raminosoa
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Publication number: 20150123506Abstract: A permanent magnet machine, a rotor assembly for the machine, and a pump assembly. The permanent magnet machine includes a stator assembly including a stator core configured to generate a magnetic field and extending along a longitudinal axis with an inner surface defining a cavity and a rotor assembly including a rotor core and a rotor shaft. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further including a plurality of permanent magnets for generating a magnetic field which interacts with the stator magnetic field to produce torque. The permanent magnets configured as one of internal or surface mounted. The rotor assembly also including a plurality of retaining clips configured to retain the plurality of permanent magnets relative to the rotor core. The pump assembly including an electric submersible pump and a permanent magnet motor for driving the pump.Type: ApplicationFiled: November 4, 2013Publication date: May 7, 2015Applicant: General Electric CompanyInventors: Ken Ivcar Salas Nobrega, Jeremy Daniel Van Dam, Manoj Ramprasad Shah, William Dwight Gerstler, Tsarafidy Raminosoa, Edward John Flett, Patel Bhageerath Reddy, James Pellegrino Alexander
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Publication number: 20150102606Abstract: An electric generator system includes a rotatable shaft that is configured to rotate about a central longitudinal axis of the shaft, and a pilot permanent magnet generator (PMG) mounted to the shaft such that the pilot PMG is configured to rotate about the central longitudinal axis with the rotatable shaft. The system includes a wound field flux-switching electric machine having a rotor and a stator. The rotor is mounted to the shaft such that the rotor is configured to rotate about the central longitudinal axis with the shaft. The stator includes both a direct current (DC) field coil and an alternating current (AC) armature coil. The DC field coil is operatively connected to the pilot PMG for exciting the DC field coil.Type: ApplicationFiled: October 11, 2013Publication date: April 16, 2015Applicant: General Electric CompanyInventors: MANOJ RAMPRASAD SHAH, TSARAFIDY RAMINOSOA