Patents by Inventor Kiruba Sivasubramaniam

Kiruba Sivasubramaniam 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).

  • Publication number: 20200007007
    Abstract: A propulsion system for an aircraft or other vehicle can include an electric motor with a rotor and a stator. A cooling arrangement for the electric motor can include one or more of: a heat sink that is disposed within an internal area of the motor and that supports, within the internal area, one or more power-electronic components for operation of the electric motor; and a plurality of flow channels that are formed along at least one of the rotor and the stator. The flow channels can be arranged to route ambient air past the at least one of the rotor and the stator during operation of the aircraft or other vehicle.
    Type: Application
    Filed: August 30, 2019
    Publication date: January 2, 2020
    Applicant: The Board of Trustees of the University of Illinois
    Inventor: Kiruba Sivasubramaniam Haran
  • Patent number: 10355549
    Abstract: A machine for obtaining very high power density is provided, significantly increasing the air-gap magnetic flux density and eliminating the ferromagnetic steel traditionally employed to carry and shield magnetic flux. In one embodiment, an arrangement of main coils and a set of compensating coils is employed to cancel out the field outside the machine without the use of iron while maintaining air gap field levels that are 3 to 10 times greater than conventional machines.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: July 16, 2019
    Inventor: Kiruba Sivasubramaniam Haran
  • Patent number: 10224799
    Abstract: A cryocooler assembly for cooling a field winding of an electrical machine having an axis of rotation is provided. The assembly includes a cryocooler and a reservoir coupled in flow communication to the cryocooler and configured to contain a cooling agent. A flow assembly is coupled in flow communication to the reservoir. The flow assembly includes a first flow loop coupled in flow communication to the reservoir; a second flow loop coupled in flow communication to the reservoir; and a plurality of flow members coupled in flow communication to the first flow loop and the second flow loop and coupled to the field winding. Each flow member is configured to thermosiphon the cooling agent in a first state from the reservoir and in a second state to the reservoir.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: March 5, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Ernst Wolfgang Stautner, Evangelos Trifon Laskaris, Kiruba Sivasubramaniam Haran, Ruben Jeevanasan Fair, Randy Scott Longtin, Suyu Hou, Fulton Jose Lopez
  • Publication number: 20180287437
    Abstract: An electric motor can include a stator including a plurality of air-gap wound coils supported by a yoke, and a rotor including a permanent magnet array. The air-gap wound coils can be impregnated with a resin containing a plurality of particles, such as ceramic nanoparticles or iron particles. A corresponding control system for an electric motor can include a boost converter, and a reconfigurable multilevel inverter.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 4, 2018
    Inventor: Kiruba Sivasubramaniam Haran
  • Patent number: 9640308
    Abstract: A high temperature superconducting (HTS) magnet coil disposed within a cryostat is configured with a thermo-siphon cooling system containing a liquid cryogen. The cooling system is configured to indirectly conduction cool the HTS magnet coil by nucleate boiling of the liquid cryogen that is circulated by the thermo-siphon in a cooling tube attached to a heat exchanger bonded to the outside surface of the HTS magnet coil. A supply dewar is configured with a re-condenser cryocooler coldhead to recondense boiloff vapors generated during the nucleate boiling process.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: May 2, 2017
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, James Pellegrino Alexander, Kiruba Sivasubramaniam, Tao Zhang
  • Patent number: 9570220
    Abstract: In one embodiment, a cryocooler assembly for cooling a heat load is provided. The cryocooler assembly includes a vacuum vessel surrounding the heat load and a cryocooler at least partially inserted into the vacuum vessel, the cryocooler including a coldhead. The assembly further includes an actuator coupled to the cryocooler. The actuator is configured to translate the cryocooler coldhead into thermal engagement with the heat load and to maintain constant pressure of the coldhead against the heat load to facilitate maintaining thermal engagement with the heat load as the heat load shrinks during a cool down process.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: February 14, 2017
    Assignee: General Electric Company
    Inventors: Ernst Wolfgang Stautner, Kiruba Sivasubramaniam Haran, Ruben Jeevanasan Fair
  • Patent number: 9246373
    Abstract: An assembly for cooling an electrical coil winding having a first coil, a second coil, a first end turn and a second end turn is provided. The assembly includes a supply header; a return header; and a plurality of flow members coupled in flow communication to the supply header and the return header. The flow members are configured to channel a flow agent from supply header to the return header. Each the flow member of the plurality of flow members includes a first portion coupled to the first coil; a second portion coupled to the second coil; a first end portion coupled to the first end turn and coupled in flow communication to the first portion and the second portion; and a second end portion coupled to the second end turn and coupled in flow communication to the second portion.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: January 26, 2016
    Assignee: General Electric Company
    Inventors: Robert M. Zirin, Kiruba Sivasubramaniam Haran, Michael John Douglass, Rammohan Rao Kalluri
  • Publication number: 20150275870
    Abstract: A pumping system for use in moving a fluid present within a wellbore is provided. The pumping system includes an electric linear motor having a motor housing and a stator coupled to the motor housing. The stator includes a track having a primary magnet assembly. A motor shaft is electrically coupled to the stator and includes a body having a secondary magnet assembly. The pumping system includes a pump coupled to the electric linear motor, which includes a pump housing coupled to the motor housing and a pump piston coupled to the motor shaft. The pump piston is configured to reciprocate within the pump housing between a second position and a first position. A seal is coupled to the motor housing and the motor housing and configured to direct the fluid into the pump housing when the pump piston is in the first position and to direct the fluid out of the pump housing when the pump piston is in the second position.
    Type: Application
    Filed: March 31, 2014
    Publication date: October 1, 2015
    Applicant: General Electric Company
    Inventors: Jeremy Daniel Van Dam, Manoj Ramprasad Shah, Kiruba Sivasubramaniam Haran
  • Publication number: 20150207365
    Abstract: A system includes a generator unit coupleable to a hydro turbine. The generator unit includes a casing having a first stationary support coupleable to a base disposed within water and a superconducting generator disposed within the casing. The superconducting generator includes an annular armature and an annular field winding including a plurality of superconducting magnets disposed coaxial with the annular armature and separated by a gap. One of the annular armature and the annular field winding is rotatable by the hydro turbine and other of the annular armature and the annular field winding is stationary.
    Type: Application
    Filed: December 5, 2013
    Publication date: July 23, 2015
    Applicant: General Electric Company
    Inventors: Kiruba Sivasubramaniam Haran, Ernst Wolfgang Stautner, James Humphrie Rochford, Andrew Allen Rockhill, Ruben Jeevanasan Fair, Renuka Rajput-Ghoshal
  • Publication number: 20150134109
    Abstract: A switched capacitive device includes a stator including a plurality of first electrodes extending substantially in a longitudinal dimension. The switched capacitive device also includes an armature including a plurality of second electrodes proximate the plurality of first electrodes. The plurality of second electrodes is translatable with respect to the plurality of first electrodes. The plurality of second electrodes extends substantially in the longitudinal dimension. The plurality of first electrodes and the plurality of second electrodes are configured to induce substantially linear motion of the second plurality of electrodes in the longitudinal dimension with respect to the first plurality of electrodes as a function of an electric field induced by at least a portion of the first plurality of electrodes.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Rui Zhou, Manoj Ramprasad Shah, Kiruba Sivasubramaniam Haran, Arthur Vorwerk Radun, Enis Tuncer
  • Patent number: 8860287
    Abstract: The present disclosure relates to wind power generation systems having a segmented stator with a structural element and a plurality of coils. The wind power generation systems also include a rotor adapted to be rotated by wind to induce current in the plurality of coils and a lamination stack having a plurality of lamination plates disposed about the plurality of coils and a dovetail recess formed in the lamination stack. The wind power generation systems also include a dovetail bar adapted to be received by the dovetail recess and adjusted by a bolt to engage the lamination stack and the structural element of the segmented stator to form a torque transfer interface. Torque is adapted to be transferred from the lamination stack to the segmented stator via friction at the interface.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: October 14, 2014
    Assignee: General Electric Company
    Inventors: Randy Scott Longtin, Robert Michael Zirin, Kiruba Sivasubramaniam Haran
  • Publication number: 20140236748
    Abstract: A method of facilitating a creation of group of customers and soliciting an offer for a plurality of goods or services, which includes enrolling a plurality of consumers in a service for submission of at least one offer to at least one vendor to purchase goods or services; receiving requests for goods and/or services from the plurality of consumers via a networking device; automatically processing requests for goods and/or service from the plurality of consumers to build at least one group request of similar and/or identical goods and/or services for a submission to at least one vendor; and submitting the at least one group request to the at least one vendor on behalf of the plurality of consumers.
    Type: Application
    Filed: February 20, 2013
    Publication date: August 21, 2014
    Inventors: Kiruba Sivasubramaniam HARAN, Suthaharan Sivasubramaniam, Vidya Venkataraman Sivasubramaniam
  • Publication number: 20140117794
    Abstract: An assembly for cooling an electrical coil winding having a first coil, a second coil, a first end turn and a second end turn is provided. The assembly includes a supply header; a return header; and a plurality of flow members coupled in flow communication to the supply header and the return header. The flow members are configured to channel a flow agent from supply header to the return header. Each the flow member of the plurality of flow members includes a first portion coupled to the first coil; a second portion coupled to the second coil; a first end portion coupled to the first end turn and coupled in flow communication to the first portion and the second portion; and a second end portion coupled to the second end turn and coupled in flow communication to the second portion.
    Type: Application
    Filed: October 31, 2012
    Publication date: May 1, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Robert M. Zirin, Kiruba Sivasubramaniam Haran, Michael John Douglass, Rammahan Rao Kalluri
  • Patent number: 8710944
    Abstract: A superconducting magnetizer includes a thermal shield disposed within a vacuum chamber. A superconducting magnet is disposed within the thermal shield and configured to generate a magnetic field in response to an electric current supplied to the superconducting magnet. A heat transfer device comprising at least one of a thermal conduction device, and a heat pipe is disposed contacting the superconducting magnet. A cryocooler is coupled to the heat transfer device and configured to cool the superconducting magnet via the heat transfer device.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: April 29, 2014
    Assignee: General Electric Company
    Inventors: Ernst Wolfgang Stautner, Kiruba Sivasubramaniam Haran
  • Publication number: 20140100113
    Abstract: In one embodiment, a cryocooler assembly for cooling a heat load is provided. The cryocooler assembly includes a vacuum vessel surrounding the heat load and a cryocooler at least partially inserted into the vacuum vessel, the cryocooler including a coldhead. The assembly further includes an actuator coupled to the cryocooler. The actuator is configured to translate the cryocooler coldhead into thermal engagement with the heat load and to maintain constant pressure of the coldhead against the heat load to facilitate maintaining thermal engagement with the heat load as the heat load shrinks during a cool down process.
    Type: Application
    Filed: October 8, 2012
    Publication date: April 10, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ernst Wolfgang Stautner, Kiruba Sivasubramaniam Haran, Ruben Jeevanasan Fair
  • Publication number: 20140100114
    Abstract: A cryocooler assembly for cooling a field winding of an electrical machine having an axis of rotation is provided. The assembly includes a cryocooler and a reservoir coupled in flow communication to the cryocooler and configured to contain a cooling agent. A flow assembly is coupled in flow communication to the reservoir. The flow assembly includes a first flow loop coupled in flow communication to the reservoir; a second flow loop coupled in flow communication to the reservoir; and a plurality of flow members coupled in flow communication to the first flow loop and the second flow loop and coupled to the field winding. Each flow member is configured to thermosiphon the cooling agent in a first state from the reservoir and in a second state to the reservoir.
    Type: Application
    Filed: October 8, 2012
    Publication date: April 10, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ernst Wolfgang Stautner, Evangelos Trifon Laskaris, Kiruba Sivasubramaniam Haran, Ruben Jeevanasan Fair, Randy Scott Longtin, Suyu Hou, Fulton Jose Lopez
  • Patent number: 8671552
    Abstract: An electrical machine includes a stator and a rotor. The stator has a central opening that is configured to receive the rotor. The rotor includes a generally cylindrical first section comprising a first material mounted on an axially extending shaft within the central opening. The rotor further includes a second section having a second material of a predetermined thickness that is coated directly on at least a portion of the first section. The second material has a higher electrical conductivity relative to the first material.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: March 18, 2014
    Assignee: General Electric Company
    Inventors: James William Bray, Kiruba Sivasubramaniam, Manoj Ramprasad Shah
  • Patent number: 8581464
    Abstract: The present application provides a segmented rotor. The segmented rotor may include a center wheel, a number of rotor support segments positioned about the center wheel, and a number of active rotor components positioned about each of the rotor support segments.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: November 12, 2013
    Assignee: General Electric Company
    Inventors: Murtuza Lokhandwalla, Kiruba Sivasubramaniam Haran, Daniel Erno, Robert Zirin
  • Patent number: 8541919
    Abstract: A rotor structure for an interior permanent magnet (IPM) electromotive machine is provided. The rotor structure may include at least one rotor lamination, which in turn may include at least one slot arranged to receive at least one permanent magnet. The slot divides the rotor lamination into a pole region and a yoke region. At least one bridge is arranged to connect the pole region to the yoke region at an outer edge of the lamination. The outer edge of the lamination is profiled along a segment of the bridge to define a concave curved profile for the bridge. The concave curved profile for the bridge allows to selectively size a thickness of the bridge to affect at least some electromagnetic and/or mechanical characteristic of the machine.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: September 24, 2013
    Assignee: General Electric Company
    Inventors: Murtuza Lokhandwalla, Rammohan Rao Kalluri, Kiruba Sivasubramaniam Haran
  • Patent number: 8492951
    Abstract: A stator assembly includes a segmented stator having stator portions. Each stator portion includes a support structure and dovetails, each coupled to the support structure by adjustable elements. The stator portion also includes stator laminations, where each of the laminations has openings to engage with the dovetails. Connectors are provided to connect the stator portions of the segmented stator together.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: July 23, 2013
    Assignee: General Electric Company
    Inventors: Robert Michael Zirin, Murtuza Lokhandwalla, Kiruba Sivasubramaniam Haran, Richard Nils Dawson, Mark John DeBlock