Patents by Inventor Rajib Datta
Rajib Datta 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: 20230412094Abstract: A power system including a power converter system and an electric machine is provided. In one aspect, the power converter system has first and second switching elements. The electric machine includes a first multiphase winding electrically coupled with the first switching elements and a second multiphase winding electrically coupled with the second switching elements. The first and second multiphase windings are arranged and configured to operate electrically opposite in phase with respect to one another. One or more processors control the first switching elements to generate first pulse width modulated (PWM) signals based on received voltage commands to render a first common mode signal and also control the second switching elements to generate second PWM signals based on received voltage commands to render a second common mode signal. The rendered first and second common mode signals have the same or similar waveform with opposite polarity with respect to one another.Type: ApplicationFiled: September 1, 2023Publication date: December 21, 2023Inventors: Kum Kang Huh, Rajib Datta, Vandana Prabhakar Rallabandi, John Russell Yagielski, Mohamed Osama
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Publication number: 20230389241Abstract: A power converter assembly includes a housing, a cold plate in the housing, and a set of power converter components on the cold plate. The cold plate is configured to receive a coolant. A first medium in the housing surrounds the cold plate and components. An expandable heat transfer structure is attached to one of the cold plate and the housing.Type: ApplicationFiled: December 15, 2022Publication date: November 30, 2023Inventors: Sanjay Vijayaraghavan, Libing Wang, Han Xiong, Kum Kang Huh, Di Pan, Mark Edward Dame, Rajib Datta, Alankrita Singh
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Publication number: 20230356849Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: ApplicationFiled: July 17, 2023Publication date: November 9, 2023Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Patent number: 11750114Abstract: A power system including a power converter system and an electric machine is provided. In one aspect, the power converter system has first and second switching elements. The electric machine includes a first multiphase winding electrically coupled with the first switching elements and a second multiphase winding electrically coupled with the second switching elements. The first and second multiphase windings are arranged and configured to operate electrically opposite in phase with respect to one another. One or more processors control the first switching elements to generate first pulse width modulated (PWM) signals based on received voltage commands to render a first common mode signal and also control the second switching elements to generate second PWM signals based on received voltage commands to render a second common mode signal. The rendered first and second common mode signals have the same or similar waveform with opposite polarity with respect to one another.Type: GrantFiled: October 22, 2021Date of Patent: September 5, 2023Assignees: General Electric Company, General Electric Deutschland Holding GmbHInventors: Kum Kang Huh, Rajib Datta, Vandana Prabhakar Rallabandi, John Russell Yagielski, Mohamed Osama
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Publication number: 20230130278Abstract: A power system including a power converter system and an electric machine is provided. In one aspect, the power converter system has first and second switching elements. The electric machine includes a first multiphase winding electrically coupled with the first switching elements and a second multiphase winding electrically coupled with the second switching elements. The first and second multiphase windings are arranged and configured to operate electrically opposite in phase with respect to one another. One or more processors control the first switching elements to generate first pulse width modulated (PWM) signals based on received voltage commands to render a first common mode signal and also control the second switching elements to generate second PWM signals based on received voltage commands to render a second common mode signal. The rendered first and second common mode signals have the same or similar waveform with opposite polarity with respect to one another.Type: ApplicationFiled: October 22, 2021Publication date: April 27, 2023Inventors: Kum Kang Huh, Rajib Datta, Vandana Prabhakar Rallabandi, John Russell Yagielski, Mohamed Osama
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Publication number: 20230023335Abstract: This invention pertains to reliable, lightweight and efficient hybrid electric powertrain and components thereof to power hybrid electric aircraft from one or more sources of electrical energy. In particular, a novel architecture is proposed for power panels that receive, condition and distribute high levels of electrical power to and from the propulsion electric motors and the one or several sources of electrical energy. Systems and methods for architecting the power panels using efficient, reusable and modular power electronics building blocks (PEBBs) is described, along with additional systems and methods for the optimal control of the power panels and components thereof. In addition, novel systems and methods are described for the efficient and lightweight thermal management for hybrid electric powertrain components, ranging from distribution manifolds for the powertrain or power panels, to micro fluid channels for cooling electronics with extreme heat flux.Type: ApplicationFiled: March 14, 2022Publication date: January 26, 2023Inventors: Waleed Said, Rajib Datta, Matt Feddersen, Shashank Natesh
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Publication number: 20220258867Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: ApplicationFiled: May 6, 2022Publication date: August 18, 2022Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Patent number: 11325714Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: GrantFiled: July 9, 2020Date of Patent: May 10, 2022Assignee: General Electric CompanyInventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Patent number: 11312503Abstract: This invention pertains to reliable, lightweight and efficient hybrid electric powertrain and components thereof to power hybrid electric aircraft from one or more sources of electrical energy. In particular, a novel architecture is proposed for power panels that receive, condition and distribute high levels of electrical power to and from the propulsion electric motors and the one or several sources of electrical energy. Systems and methods for architecting the power panels using efficient, reusable and modular power electronics building blocks (PEBBs) is described, along with additional systems and methods for the optimal control of the power panels and components thereof. In addition, novel systems and methods are described for the efficient and lightweight thermal management for hybrid electric powertrain components, ranging from distribution manifolds for the powertrain or power panels, to micro fluid channels for cooling electronics with extreme heat flux.Type: GrantFiled: December 17, 2019Date of Patent: April 26, 2022Assignee: Zunum Aero, Inc.Inventors: Waleed Said, Rajib Datta, Matt Feddersen, Shashank Natesh
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Publication number: 20220009643Abstract: An electric power system for a vehicle includes at least one electric machine, one or more power rectifiers, and a plurality of DC channels. The at least one electric machine includes a plurality of tooth-wound multi-phase windings that are substantially magnetically decoupled, and the at least one electric machine is mechanically balanced even if one of the plurality of windings is de-energized. The one or more power rectifiers are configured to produce rectified power from the power generated by the at least one electric machine. The plurality of DC channels are formed after the at least one power rectifier and are configured to provide DC power to one or more loads within a vehicle.Type: ApplicationFiled: July 9, 2020Publication date: January 13, 2022Inventors: Rajib Datta, Vishnu Mahadeva Iyer, Mohamed Osama, Kum Kang Huh, Vandana Prabhakar Rallabandi
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Patent number: 10823147Abstract: A wind farm is presented. The wind farm includes a plurality of wind turbine stations, where each wind turbine station includes a wind turbine and a generator sub-system. The generator sub-system includes a doubly-fed induction generator configured to generate an alternating current voltage and a wind turbine station power converter. The wind farm further includes a power collection sub-system that includes a power bus and a sub-station power converter. The wind farm also includes a control system configured to determine a wind speed metric, estimate a corresponding frequency metric, calculate a desirable frequency based on the wind speed metric and frequency compensation ranges of the wind turbine station power converters, and generate and communicate control commands to the sub-station power converter based on the desirable frequency to allow the sub-station power converter to update a line frequency of a power bus voltage based on the desirable frequency.Type: GrantFiled: December 16, 2016Date of Patent: November 3, 2020Assignee: General Electric CompanyInventors: Govardhan Ganireddy, Rajib Datta
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Patent number: 10763655Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.Type: GrantFiled: September 6, 2018Date of Patent: September 1, 2020Assignee: General Electric CompanyInventors: Xu She, Rajib Datta, Ravisekhar Nadimpalli Raju, Maja Harfman-Todorovic, Philip Michael Cioffi
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Publication number: 20200235557Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.Type: ApplicationFiled: April 8, 2020Publication date: July 23, 2020Inventors: Xu She, Rajib Datta, Ravisekhar Nadimpalli Raju, Maja Harfman- Todorovic, Philip Michael Cioffi
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Publication number: 20200158085Abstract: Power converters for use in wind turbine systems are included. For instance, a wind turbine system can include a full power generator having a stator and a rotor. The generator is configured to provide a low voltage alternating current power on a stator bus of the wind turbine system. The wind turbine system includes a power converter configured to convert the low voltage alternating current power provided on the stator bus to a medium voltage multiphase alternating current output power suitable for provision to the electrical grid. The power converter includes a plurality of conversion modules, each conversion module comprising a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the wind turbine system.Type: ApplicationFiled: January 25, 2020Publication date: May 21, 2020Inventors: Robert Gregory Wagoner, Govardhan Ganireddy, Saurabh Shukla, Rajni Kant Burra, Ravisekhar Nadimpalli Raju, Rui Zhou, Rajib Datta, John Leo Bollenbecker
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Publication number: 20200088167Abstract: A wind farm is presented. The wind farm includes a plurality of wind turbine stations, where each wind turbine station includes a wind turbine and a generator sub-system. The generator sub-system includes a doubly-fed induction generator configured to generate an alternating current voltage and a wind turbine station power converter. The wind farm further includes a power collection sub-system that includes a power bus and a sub-station power converter. The wind farm also includes a control system configured to determine a wind speed metric, estimate a corresponding frequency metric, calculate a desirable frequency based on the wind speed metric and frequency compensation ranges of the wind turbine station power converters, and generate and communicate control commands to the sub-station power converter based on the desirable frequency to allow the sub-station power converter to update a line frequency of a power bus voltage based on the desirable frequency.Type: ApplicationFiled: December 16, 2016Publication date: March 19, 2020Inventors: Govardhan Ganireddy, Rajib Datta
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Publication number: 20190343020Abstract: A heat sink for cooling an electronic component includes a substrate comprising an electrically non-conductive material and an inlet port and an outlet port extending outward from the substrate. The inlet and outlet ports are fluidically coupled to a fluid flow surface of the heat sink by passages that extend through a portion of the substrate. The heat sink also includes a shield comprising an electrically conductive material. The shield is disposed atop or within the substrate and is configured to suppress electromagnetic interference generated by an electronic component coupled to the heat sink.Type: ApplicationFiled: May 1, 2018Publication date: November 7, 2019Inventors: Maja Harfman Todorovic, Philip Michael Cioffi, Xu She, Gary Dwayne Mandrusiak, Rajib Datta, Michael Joseph Schutten
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Publication number: 20190343019Abstract: A device for cooling an electronic component includes a substrate having a component mounting surface and a fluid flow surface recessed relative to the component mounting surface. The device also includes an inlet orifice positioned proximate a first end of the fluid flow surface and an outlet orifice positioned proximate a second end of the fluid flow surface. A pattern of surface features is arranged on the fluid flow surface. The pattern of surface features is configured to entrain a coolant flowing across the fluid flow surface and redirect the coolant upward and away from the fluid flow surface.Type: ApplicationFiled: May 1, 2018Publication date: November 7, 2019Inventors: Maja Harfman Todorovic, Philip Michael Cioffi, Xu She, Gary Dwayne Mandrusiak, Rajib Datta, Michael Joseph Schutten
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Patent number: 10439533Abstract: Power converters for use in wind turbine systems are included. For instance, a wind turbine system can include a wind driven doubly fed induction generator having a stator and a rotor. The stator is configured to provide a medium voltage alternating current power on a stator bus of the wind turbine system. The wind turbine system includes a power converter configured to convert a low voltage alternating current power provided by the rotor to a medium voltage multiphase alternating current output power suitable for provision to an electrical grid. The power converter includes a plurality conversion modules. Each conversion module includes a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the wind turbine system.Type: GrantFiled: January 5, 2017Date of Patent: October 8, 2019Assignee: General Electric CompanyInventors: Robert Gregory Wagoner, Govardhan Ganireddy, Saurabh Shukla, Rajni Kant Burra, Ravisekhar Nadimpalli Raju, Rui Zhou, Rajib Datta, John Leo Bollenbecker
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Patent number: 10411473Abstract: Power converters for use in energy systems are included. For instance, an energy system can include an input power source configured to provide a low voltage direct current power. The energy system can include a power converter configured to convert the low voltage direct current power provided by the input power source to a medium voltage multiphase alternating current output power suitable for provision to an alternating current power system. The power converter can include a plurality conversion modules. Each conversion module includes a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the energy system.Type: GrantFiled: January 5, 2017Date of Patent: September 10, 2019Assignee: GENERAL ELECTRIC COMPANYInventors: Robert Gregory Wagoner, Govardhan Ganireddy, Saurabh Shukla, Rajni Kant Burra, Ravisekhar Nadimpalli Raju, Rui Zhou, Rajib Datta, John Leo Bollenbecker
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Publication number: 20190173419Abstract: A power generation architecture includes a plurality of photovoltaic blocks and a medium voltage direct current MVDC electrical power collector. Each photovoltaic (PV) block includes a plurality of PV groups and a combiner. Each plurality of PV groups includes a plurality of PV strings and a DC to DC power converter. Each PV string is operable to output low voltage, DC electrical power. The DC to DC power converter is operable to convert the low voltage, DC electrical power to medium voltage, DC electrical power. The combiner is operable to combine the medium voltage DC electrical power of the DC to DC power converters to produce a block output. The MVDC collector is operable to combine each block output.Type: ApplicationFiled: December 5, 2017Publication date: June 6, 2019Inventors: Min Yan, Ibrahima Ndiaye, Xu She, Rajib Datta