Chong Il Lee

US Patent:

6346810, Feb 12, 2002

Filed:

Feb 6, 2001

Appl. No.:

09/778990

Inventors:

Chahee P. Cho - Carmel IN
Chong O. Lee - Lancaster CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01R 3302

US Classification:

3242441, 324244, 324252, 324260, 324 96, 318471, 361 24

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.

US Patent:

20090001831, Jan 1, 2009

Filed:

Jun 26, 2007

Appl. No.:

11/768258

Inventors:

Chahee P. Cho - Carmel IN, US
Chong O. Lee - Madison AL, US

International Classification:

H02K 21/12
H02K 15/03

US Classification:

310112, 29598, 31015636

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.

US Patent:

62625748, Jul 17, 2001

Filed:

Mar 12, 1999

Appl. No.:

9/285171

Inventors:

Chahee P. Cho - Carmel IN
Chong O. Lee - Lancaster CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01R 3302

US Classification:

3242441

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.