Patents by Inventor Chong O. Lee

Chong O. Lee 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).

  • Axial Field Electric Motor and Method
    Publication number: 20090001831
    Abstract: A hybrid field, brushless, permanent magnet electric motor utilizing a rotor with two sets of permanent magnets oriented such that the flux produced by the two sets of magnets is perpendicular to each other. A plurality of axial flux permanent magnets are positioned radially interiorly of a plurality of radial flux permanent magnets. Axial stators interact with the axial flux permanent magnets. A radially positioned stator interacts with radial flux permanent magnets. In one configuration, an electronic feedback system is created that magnetically clamps and holds the hybrid rotor in its axially centrally aligned position, thereby reducing axial vibrations.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 1, 2009
    Inventors: Chahee P. Cho, Chong O. Lee
  • Electric motor control using temperature and magnetic field strength variation of its stator liminations
    Patent number: 6346810
    Abstract: A sensor for facilitating the measurement of temperature and magnetic field is described. The sensor comprises an optical cable having a distal end encompassed in a sheath of giant magnetoresistive material. Temperature changes alter the spectrum emissivity of the giant magnetoresistive material. Magnetic field changes alter the spectrum changes that occur from distorting the optical fiber that occur when the giant magnetoresistive material distorts the optical fiber.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: February 12, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Chahee P. Cho, Chong O. Lee
  • Sensor for measuring magnetic field strength and temperature for an electric motor
    Patent number: 6262574
    Abstract: A sensor for facilitating the measurement of temperature and magnetic field is described. The sensor comprises an optical cable having a distal end encompassed in a sheath of giant magnetoresistive material. Temperature changes alter the spectrum emissivity of the giant magnetoresistive material. Magnetic field changes alter the spectrum changes that occur from distorting the optical fiber that occur when the giant magnetoresistive material distorts the optical fiber.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: July 17, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Chahee P. Cho, Chong O. Lee
  • AN ELECTRIC MOTOR
    Publication number: 20010007423
    Abstract: A sensor for facilitating the measurement of temperature and magnetic field is described. The sensor comprises an optical cable having a distal end encompassed in a sheath of giant magnetoresistive material. Temperature changes alter the spectrum emissivity of the giant magnetoresistive material. Magnetic field changes alter the spectrum changes that occur from distorting the optical fiber that occur when the giant magnetoresistive material distorts the optical fiber.
    Type: Application
    Filed: February 6, 2001
    Publication date: July 12, 2001
    Applicant: United States of America, Secretary of the Navy
    Inventors: Chahee P. Cho, Chong O. Lee