The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 1979
Filed:
Dec. 30, 1976
Applicant:
Inventors:
Sheppard J Salon, Pittsburgh, PA (US);
Lon W Montgomery, Monroeville, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324 51 ; 310 / ; 3241 / ;
Abstract
A method and apparatus are provided for detecting rotor faults in large dynamoelectric machines, such as turbine generators. Faults in the rotor windings of such machines may occur as shorted turns or as ground faults, and in either case even harmonics are produced in the field flux waveform in the air gap of the machine. The occurrence of such faults, therefore, can be detected by monitoring the flux waveform in the air gap to detect the presence of even harmonics. This may be done by means of a search coil or coils properly disposed in the air gap of the machine.