Patents by Inventor David Tsui

David Tsui 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: 7821145
    Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 26, 2010
    Assignee: Smiths Aerospace, LLC
    Inventors: Hao Huang, David Karipides, Mohamed Abbas, David Tsui
  • Publication number: 20090174188
    Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.
    Type: Application
    Filed: March 16, 2009
    Publication date: July 9, 2009
    Inventors: Hao Huang, David Karipides, Mohamed Abbas, David Tsui
  • Patent number: 7508086
    Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: March 24, 2009
    Assignee: General Electric Company
    Inventors: Hao Huang, David Karipides, Mohamed Abbas, David Tsui
  • Publication number: 20070222220
    Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.
    Type: Application
    Filed: June 14, 2006
    Publication date: September 27, 2007
    Inventors: Hao Huang, David Karipides, Mohamed Abbas, David Tsui
  • Publication number: 20050133318
    Abstract: Method for determining a present coil temperature of a coil of a magnetorheological (MR) damper of an operating automotive vehicle, wherein the coil is powered by an output of a controller connected to the coil through a conductor. One step includes calculating a coil-plus-conductor resistance from the voltage and the current of the output of the controller when the controller applies a test current to the coil and the conductor. Another step includes calculating the present coil temperature using at least the coil-plus-conductor resistance and compensating for the resistance of the conductor.
    Type: Application
    Filed: December 19, 2003
    Publication date: June 23, 2005
    Inventors: Brandon Fedders, Roy Mwangi, David Tsui, David Shal