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:
Nov. 21, 2017
Filed:
Oct. 29, 2013
Applicant:
Abb Schweiz Ag, Baden, CH;
Inventor:
Pedro Rodriguez, Vasteras, SE;
Assignee:
ABB Schweiz AG, Baden, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 5/12 (2006.01); G01R 31/34 (2006.01); G01H 1/00 (2006.01); H02P 29/02 (2016.01);
U.S. Cl.
CPC ...
G01R 31/343 (2013.01); G01H 1/003 (2013.01); H02P 29/02 (2013.01);
Abstract
A method for discovering demagnetisation faults of a permanent magnet synchronous generator, such as a wind power generator. The method is performed during operation of the synchronous generator and includes measuring the vibration of the stator, performing a frequency analysis of the vibration, and deducing whether the generator suffers from demagnetization of a permanent magnet, from the vibration analysis. Moreover, geometric eccentricity faults and electric short circuit faults may also be detected from the vibration.