Patents by Inventor Ronghai Qu

Ronghai Qu 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).

  • Patent number: 7489062
    Abstract: A synchronous reluctance machine that has a stator and a rotor shaft operationally disposed within the confines of the stator. Laminations are axially stacked to form boat shaped segments. A plurality of selected boat shaped segments form a selected number of rotor poles about the rotor shaft and a plurality of support bars disposed intermittently between the boat shaped segments. Each segment of lamination is boat shaped with angular acuity facing towards the stator.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: February 10, 2009
    Assignee: General Electric Company
    Inventors: Manoj Ramprasad Shah, Jeremy Daniel VanDam, William Dwight Gerstler, Ronghai Qu, Ralph James Carl, Jr.
  • Patent number: 7489060
    Abstract: A machine includes a shaft adapted to rotate about a longitudinal axis and formed of a magnetic material and a rotor assembly rotationally engaged with the shaft The rotor assembly includes a pair of rotor disks comprising a magnetic material, each of the rotor disks having a number of magnetic poles, the magnetic poles being spaced apart circumferentially. The rotor disks are coupled to the shaft for rotation about the shaft and generation of a rotating permeance wave. The machine further includes a stator assembly that includes a magnetic core stator disposed between the rotor disks, a number of armature windings supported on the magnetic core stator, and a stationary superconducting field coil disposed between the magnetic core stator and the shaft. The stationary superconducting field coil is configured as a stationary magneto-motive force (MMF) source for the rotating permeance wave produced by the rotor assembly to produce a rotating magnetic field.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: February 10, 2009
    Assignee: General Electric Company
    Inventors: Ronghai Qu, James William Bray
  • Publication number: 20080315698
    Abstract: An apparatus includes a first motor and a second motor. The first motor includes a first rotor configured to provide mechanical power to a vehicle, and a first plurality of stator coils having a core and coupled to the first rotor. The second motor includes a second rotor configured to provide mechanical power to the vehicle, and a second plurality of stator coils sharing the same core as the first plurality of stator coils and coupled to the second rotor.
    Type: Application
    Filed: August 28, 2008
    Publication date: December 25, 2008
    Inventors: Ayman M. El-Refaie, Michael Ciccarelli, Ronghai Qu, Lembit Salasoo
  • Publication number: 20080174194
    Abstract: An electromagnetic machine for extracting power from a turbine engine includes an outer rotor and an inner rotor rotatably supported adjacent to a stator. The stator is disposed between the inner and outer rotors. The stator has an inner set of windings disposed on an inner surface adjacent to the inner rotor, and an outer set of windings on an outer surface of the stator adjacent to the outer rotor. A plurality of permanent magnets are disposed on an inner surface of the outer rotor element and on an outer surface of the inner rotor element. Air gaps are defined between the outer surface of the stator and the outer permanent magnets, and between the inner surface of the stator portion and the inner permanent magnets. The inner stator windings form a set of multiple-phase windings. and the outer stator windings form a set of multiple-phase windings.
    Type: Application
    Filed: December 7, 2006
    Publication date: July 24, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ronghai Qu, Wei Wu, John M. Kern, Juan De Bedout, Manoj Shah, Ayman El-Refaie
  • Publication number: 20080150287
    Abstract: An electrical generator for extraction of electrical power from a gas turbine engine includes a rotor portion and a stator portion disposed within a booster cavity of the gas turbine engine. The rotor portion is rotatably supported about the stator portion. The stator portion rigidly is supported within the booster cavity. The rotor portion has a plurality of poles circumferentially arranged opposite the stator portion. The stator portion includes a plurality of coil portions disposed about an outer periphery of the stator portion adjacent to the stator portion. The stator and rotor portions are configured to generate electrical power when the rotor portion is rotated about the stator portion by a shaft of the gas turbine engine to induce electrical currents in the coil portions. The electrical generator extracts electric power from the turbine engine to supplement primary electrical generation sources of the engine.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: John M. Kern, Ronghai Qu, Craig Douglas Young
  • Publication number: 20080143115
    Abstract: An inside out generator disposed aft of the low-pressure turbine spool to generate power for the electrical demands of an aircraft system. The low-pressure turbine discharge flow is used to drive the power turbine, which is coupled to the generator. The generator is able to extract power at idle conditions of the aircraft engine from ducting the discharge through the inside out generator. The system eliminates the placement of a generator in the hot gas path of the discharge, and enables the injection of power directly to the accessory gear box of the engine.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: John M. Kern, KiYoung Chung, Ronghai Qu, Wei Wu, Craig D. Young, Peter D. Toot, Christopher Glynn, Tom Compton
  • Publication number: 20080142284
    Abstract: A double-sided dual-shaft electrical machine includes a stator disposed between the inner rotor and the outer rotor. The stator includes a plurality of inner stator coils disposed adjacent to the inner rotor for driving the inner rotor. A plurality of outer stator coils disposed adjacent to the outer rotor for driving the outer rotor.
    Type: Application
    Filed: December 15, 2006
    Publication date: June 19, 2008
    Inventors: Ronghai Qu, Timothy Gerard Richter, Henry Todd Young
  • Publication number: 20080136189
    Abstract: An electromagnetically variable transmission includes an outer rotor and an inner rotor. The inner rotor is independently rotatable within a center aperture of the outer rotor. The outer rotor is independently rotatable about the inner rotor. One of the rotors has a plurality of permanent magnets configured in pairs and facing an air gap disposed between the outer rotor and the inner rotor. The other rotor has a plurality of slots spaced about a magnetically permeable core having embedded windings. The outer inner rotors are simultaneously rotatable in one direction. In response to rotation of the outer rotor portion and the inner rotor portion, a magnetic flux path is generated between the permanent magnet pairs, the air gap, the outer rotor core and the inner rotor portion core, to induce electrical power in the windings, which transfers power between the inner rotor portion and the outer rotor portion.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 12, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ronghai Qu, Wei Wu, John M. Kern
  • Publication number: 20080001495
    Abstract: A machine includes a stator assembly that includes a stator yoke, a pair of armature coils mechanically coupled to the stator yoke, and a stationary superconducting field coil. The stator yoke comprises a magnetic material. The machine further includes a shaft rotatably mounted in the stator yoke, the shaft comprising a non-magnetic material. The machine further includes a rotor assembly rotationally engaged with the shaft. The rotor assembly includes a rotor disk extending between the armature coils, the rotor disk having an inner portion and an outer portion. The outer portion of the rotor disk includes a number of circumferentially-spaced, magnetic poles. The rotor disk is coupled to the shaft for rotation about the shaft and generation of a rotating permeance wave.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 3, 2008
    Inventors: Ronghai Qu, James William Bray
  • Publication number: 20080001491
    Abstract: A machine includes a shaft adapted to rotate about a longitudinal axis and formed of a magnetic material and a rotor assembly rotationally engaged with the shaft The rotor assembly includes a pair of rotor disks comprising a magnetic material, each of the rotor disks having a number of magnetic poles, the magnetic poles being spaced apart circumferentially. The rotor disks are coupled to the shaft for rotation about the shaft and generation of a rotating permeance wave. The machine further includes a stator assembly that includes a magnetic core stator disposed between the rotor disks, a number of armature windings supported on the magnetic core stator, and a stationary superconducting field coil disposed between the magnetic core stator and the shaft. The stationary superconducting field coil is configured as a stationary magneto-motive force (MMF) source for the rotating permeance wave produced by the rotor assembly to produce a rotating magnetic field.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 3, 2008
    Inventors: Ronghai Qu, James William Bray
  • Patent number: 7315103
    Abstract: A machine includes a rotatable rotor assembly having a number of salient poles. The machine further includes a stationary stator assembly having concentric inner and outer stators, at least one stationary superconducting field coil and at least one stator coil. The stationary superconducting field coil is disposed between the inner and outer stators and is mounted on at least one of the inner and outer stators. The stationary superconducting field coil and the salient poles are configured relative to each other, such that when the rotor assembly is rotated relative to the stator assembly around a predetermined axis, a rotating magnetic field is produced with an airgap flux direction substantially along the predetermined axis. The interaction between the stationary superconducting field coil and the rotating poles provides the only source of a time varying magnetic flux supplied to the stator coil.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: January 1, 2008
    Assignee: General Electric Company
    Inventors: Ronghai Qu, James William Bray
  • Publication number: 20070296299
    Abstract: This document discusses, among other things, a stator with transposition between the windings or coils. The coils are free from transposition to increase the fill factor of the stator slots. The transposition at the end connections between an inner coil and an outer coil provide transposition to reduce circulating current loss. The increased fill factor reduces further current losses. Such a stator is used in a dual rotor, permanent magnet machine, for example, in a compressor pump, wind turbine gearbox, wind turbine rotor.
    Type: Application
    Filed: June 27, 2006
    Publication date: December 27, 2007
    Inventors: Ronghai Qu, Patrick Lee Jansen
  • Publication number: 20070281558
    Abstract: A machine useful for ship propulsion purposes include a double-sided generator or motor with two concentric air gaps. In one embodiment, the machine includes a double-sided rotor with an inner rotor side and an outer rotor side; and a stator with an inner stator core and an outer stator core, wherein the double-sided rotor is concentrically disposed between the inner stator core and the outer stator core.
    Type: Application
    Filed: November 14, 2006
    Publication date: December 6, 2007
    Inventors: Patrick Jansen, James Michael Fogarty, Ralph James Carl, James Patrick Francis Lyons, Ronghai Qu
  • Publication number: 20070186692
    Abstract: An electrical machine apparatus having magnetic gearing embedded therein includes a moveable rotor having a first magnetic field associated therewith, a stator configured with a plurality of stationary stator windings therein, and a magnetic flux modulator interposed between the moveable rotor and the stator windings. The magnetic flux modulator is configured to transmit torque between the first magnetic field associated with said moveable rotor and a second magnetic field excited by the plurality of stationary stator windings.
    Type: Application
    Filed: February 14, 2006
    Publication date: August 16, 2007
    Inventors: Michal-Wolfgang Waszak, Jan Hemmelmann, Ronghai Qu, Patrick Jansen
  • Publication number: 20070108853
    Abstract: A synchronous reluctance machine that has a stator and a rotor shaft operationally disposed within the confines of the stator. Laminations are axially stacked to form boat shaped segments. A plurality of selected boat shaped segments form a selected number of rotor poles about the rotor shaft and a plurality of support bars disposed intermittently between the boat shaped segments. Each segment of lamination is boat shaped with angular acuity facing towards the stator.
    Type: Application
    Filed: November 14, 2005
    Publication date: May 17, 2007
    Inventors: Manoj Shah, Jeremy VanDam, William Gerstler, Ronghai Qu, Ralph Carl
  • Publication number: 20070108865
    Abstract: A machine useful for ship propulsion purposes includes a ship propulsion motor with two concentric air gaps. In one embodiment, the machine includes a rotor with an inner rotor core and an outer rotor core; and a double-sided stator with an inner stator side and an outer stator side. The double-sided stator is concentrically disposed between the inner rotor core and the outer rotor core.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 17, 2007
    Inventors: Patrick Jansen, James Michael Fogarty, Ralph James Carl, James Patrick Francis Lyons, Ronghai Qu
  • Publication number: 20070103027
    Abstract: The machine includes a rotor with an inner rotor core and an outer rotor core and a double-sided stator with an inner stator side and an outer stator side. The double-sided stator is concentrically disposed between the inner rotor core and the outer rotor core of the wind turbine generator. The double-sided stator is configured to enable at least a portion of magnetic flux to be shared between the inner stator side and the outer stator side. An example of a particularly useful embodiment for the machine includes a ship propulsion motor.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 10, 2007
    Inventors: Patrick Jansen, James Michael Fogarty, Bharat Sampathkumaran Bagepalli, Aniruddha Dattatraya Gadre, Ralph James Carl, James Patrick Francis Lyons, Jivtesh Garg, Ronghai Qu, Fulton Jose Lopez
  • Publication number: 20070090711
    Abstract: A pole assembly for a rotor, the pole assembly includes a permanent magnet pole including at least one permanent magnet block, a plurality of laminations including a pole cap mechanically coupled to the pole, and a plurality of laminations including a base plate mechanically coupled to the pole.
    Type: Application
    Filed: October 24, 2005
    Publication date: April 26, 2007
    Inventors: Ralph Carl, Bharat Bagepalli, Patrick Jansen, Richard Dawson, Ronghai Qu, Mikhail Avanesov
  • Patent number: 7180204
    Abstract: Methods and apparatus for assembling a wind turbine generator are provided. The wind turbine generator includes a core and a plurality of stator windings circumferentially spaced about a generator longitudinal axis, a rotor rotatable about the generator longitudinal axis wherein the rotor includes a plurality of magnetic elements coupled to a radially outer periphery of the rotor such that an airgap is defined between the stator windings and the magnetic elements and the plurality of magnetic elements including a radially inner periphery having a first diameter. The wind turbine generator also includes a bearing including a first member in rotatable engagement with a radially inner second member, the first member including a radially outer periphery, a diameter of the radially outer periphery of the first member being substantially equal to the first diameter, the rotor coupled to the stator through the bearing such that a substantially uniform airgap is maintained.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: February 20, 2007
    Assignee: General Electric Company
    Inventors: James Jonathan Grant, Bharat Sampathkumaran Bagepalli, Patrick Lee Jansen, Paul Stephen DiMascio, Aniruddha Dattatraya Gadre, Ronghai Qu
  • Publication number: 20070001533
    Abstract: In accordance with one embodiment, the present technique provides a magnetic assembly for an electrical machine having a rotor core. The magnetic assembly includes a magnetic element having a top surface, a bottom surface and at least one side surface located between the top and bottom surfaces, wherein the bottom surface of the magnetic element is couplable to a peripheral surface of the rotor core. The magnetic assembly also includes a ferromagnetic layer disposed on the top surface of the magnetic element. The magnetic assembly further includes an electrically conductive element that circumscribes the magnetic element.
    Type: Application
    Filed: June 30, 2005
    Publication date: January 4, 2007
    Inventors: Patrick Jansen, Ralph Carl, Ronghai Qu