Patents by Inventor Vandana Prabhakar Rallabandi
Vandana Prabhakar Rallabandi 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: 20230378827Abstract: An airgap cooling system (140) for an electric machine (100), the electric machine (100) including a rotor assembly (102) rotatably mounted within a stator assembly (120) and defining an airgap (130) therebetween, wherein the stator assembly (120) comprises a lamination stack (124). The airgap cooling system (140) includes a plurality of distribution passages (142) that extend through the lamination stack (124); a plurality of discharge passages (150) that extend between the plurality of distribution passages (142) and the airgap (130); a cooling manifold (160) defining an annular distribution plenum (164) in fluid communication with the plurality of distribution passages (142), wherein the cooling manifold (160) is configured for receiving a cooling fluid (144) and directing the cooling fluid (144) into the distribution plenum (164), through the distribution passage (142) and the discharge passage (150), and into the airgap (130).Type: ApplicationFiled: December 21, 2022Publication date: November 23, 2023Inventors: Bugra Han Ertas, Joseph John Zierer, JR., Vandana Prabhakar Rallabandi, David Allan Torrey, David William Crall, Mohamed Osama, Adam Tomasz Pazinski, Arthur William Sibbach
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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: 11804746Abstract: An electric machine can include a stator core having a plurality of core teeth that define a plurality of core slots in a surface thereof. A winding can be housed at least partially in the core slots. The winding can include a tube defining a channel through at least a portion thereof and one or more wires disposed along a surface of the tube that is opposite the channel. A cooling system can be operably coupled with the channel and configured to move a cooling fluid through the channel.Type: GrantFiled: August 31, 2020Date of Patent: October 31, 2023Assignee: General Electric CompanyInventors: Karthik K. Bodla, Naveenan Thiagarajan, Mohamed Osama, John Russell Yagielski, David Allan Torrey, 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: 20230260687Abstract: Methods for manufacturing dual phase soft magnetic components include combining a plurality of soft ferromagnetic particles with a plurality of paramagnetic particles to form a component structure, wherein the plurality of soft ferromagnetic particles each comprise an electrically insulative coating, and, heat treating the component structure to consolidate the plurality of soft ferromagnetic particles with the plurality of paramagnetic particles.Type: ApplicationFiled: February 14, 2022Publication date: August 17, 2023Inventors: Wanming Zhang, Ananda Barua, Shenyan Huang, Changjie Sun, Vandana Prabhakar Rallabandi, Anthony Joseph Vinciquerra, Min Zou
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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: 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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Publication number: 20220069654Abstract: An electric machine can include a stator core having a plurality of core teeth that define a plurality of core slots in a surface thereof. A winding can be housed at least partially in the core slots. The winding can include a tube defining a channel through at least a portion thereof and one or more wires disposed along a surface of the tube that is opposite the channel. A cooling system can be operably coupled with the channel and configured to move a cooling fluid through the channel.Type: ApplicationFiled: August 31, 2020Publication date: March 3, 2022Inventors: Karthik K. Bodla, Naveenan Thiagarajan, Mohamed Osama, John Russell Yagielski, David Allan Torrey, Vandana Prabhakar Rallabandi
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Publication number: 20220069672Abstract: An electric motor may include a stator assembly comprising a stator housing, and one or more rotors coupled to the stator by a rotor shaft assembly. The stator housing may include a cooling structure that has a plurality of cooling body portions and a plurality of cooling conduits defined by the plurality of cooling body portions. A method of forming a stator housing for an electric machine may include additively manufacturing a stator housing that includes a cooling structure defining a fluid domain, coupling a working fluid source to the stator housing and introducing a working fluid into the fluid domain defined by the cooling structure, and sealing the cooling structure with the working fluid contained within the fluid domain of the cooling structure.Type: ApplicationFiled: July 30, 2021Publication date: March 3, 2022Inventors: Joseph John Zierer, Brian Magann Rush, Karthik K. Bodla, Andrew Thomas Cross, Vandana Prabhakar Rallabandi, Konrad Roman Weeber, Anoop Kumar Jassal
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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