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:
May. 22, 2018
Filed:
Sep. 08, 2015
Applicant:
Abb Schweiz Ag, Baden, CH;
Inventors:
Assignee:
ABB Schweiz AG, Baden, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/02 (2006.01); G01K 13/00 (2006.01); H02P 1/46 (2006.01); G01R 31/34 (2006.01);
U.S. Cl.
CPC ...
G01R 31/346 (2013.01);
Abstract
A method and system of determining an electro-mechanical fault condition in a synchronous machine having a stator, a rotor, and exciter. The method includes: a) obtaining an exciter current signal which is a measurement of an exciter current through stationary windings of the exciter, b) transforming the exciter current signal to obtain an exciter current frequency spectrum, and c) determining whether an electro-mechanical fault condition is present, and a type of the electro-mechanical fault condition, based on harmonic content related to the frequency of the stator, of the exciter current frequency spectrum.