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:
Jun. 06, 2017
Filed:
Mar. 13, 2015
Applicant:
Doble Engineering Company, Watertown, MA (US);
Inventor:
Mark F. Lachman, San Jose, CA (US);
Assignee:
DOBLE ENGINEERING COMPANY, Watertown, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/06 (2006.01); G01R 31/02 (2006.01); G01R 31/12 (2006.01);
U.S. Cl.
CPC ...
G01R 31/027 (2013.01); G01R 31/025 (2013.01); G01R 31/12 (2013.01);
Abstract
A method for performing diagnostics on a transformer includes generating, by a voltage generator, an AC voltage and applying the AC voltage to a winding or phase of the transformer. Current flowing from the generator to the winding or phase is decomposed into a plurality of harmonic components. Respective magnitudes of the plurality of harmonic components are compared with corresponding magnitudes of harmonic components associated with one or more benchmark transformers of a known condition to determine whether the condition of the transformer matches the condition of one or more benchmark transformers.