Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SPEED SENSITIVE FIELD GROUND FAULT DETECTION MODE OF GENERATOR FIELD WINDING
Document Type and Number:
Japanese Patent JP2004159496
Kind Code:
A
Abstract:

To provide a method for locating a speed sensitive ground fault in a field winding.

The method for locating a speed sensitive ground fault state (38) in the field winding (16) of an electromagnetic synchronous machine (10) having a rotor (12) and an exciting circuit (48) comprises a step (30) for sensing a flux being generated from the field winding when the rotor is accelerating (43) and the exciting circuit is operating, a step (46) for detecting the periodic aberration of flux occurring during rotation of the rotor, and a step (50) for judging the position in the field winding corresponding to the periodic aberration and identifying that position as the location of speed sensitive ground fault state.


Inventors:
GOODRICH GREGORY JOHN
KUSAYWA WALTER JOSEPH
Application Number:
JP2003000377686
Publication Date:
June 03, 2004
Filing Date:
November 07, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
GEN ELECTRIC
International Classes:
G01R31/06; G01R31/34; H02K11/00; H02K33/18; H02K44/00; (IPC1-7): H02K11/00; G01R31/06
Attorney, Agent or Firm:
Kenichi Matsumoto
Hiroshi Ogura
Nobukazu Ito