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:
Sep. 08, 2020
Filed:
Mar. 06, 2018
Applicant:
Abb Schweiz Ag, Baden, CH;
Inventors:
Pedro Rodriguez, Västerås, SE;
Subrat Sahoo, Västerås, SE;
Assignee:
ABB Schweiz AG, Baden, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/34 (2020.01); H02K 11/25 (2016.01); H02K 3/20 (2006.01); H02K 19/14 (2006.01);
U.S. Cl.
CPC ...
G01R 31/343 (2013.01); H02K 3/20 (2013.01); H02K 11/25 (2016.01); H02K 19/14 (2013.01);
Abstract
A rotor bar fault in a rotor of an electrical machine having a plurality of rotor bars and an end ring configured to short circuit the rotor bars. The method includes the steps of measuring a first temperature at a first end ring location, and measuring a second temperature at a second end ring location, the second end ring location being different from the first end ring location. As broken rotor bars cause a non-uniform temperature distribution in the end ring, the detection of rotor bar faults can be based on monitored temperatures at different end ring locations.