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:
Jul. 09, 2024
Filed:
Feb. 17, 2020
Applicant:
Mitsubishi Electric Corporation, Tokyo, JP;
Inventors:
Kenta Yuasa, Tokyo, JP;
Kazunori Sakanobe, Tokyo, JP;
Mamoru Kamikura, Tokyo, JP;
Toshiyuki Kuriyama, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/34 (2020.01); G01R 19/00 (2006.01); H02P 25/022 (2016.01); H02P 27/06 (2006.01);
U.S. Cl.
CPC ...
G01R 31/34 (2013.01); G01R 19/0092 (2013.01); H02P 25/022 (2013.01); H02P 27/06 (2013.01);
Abstract
a permanent magnet synchronous motor diagnostic device includes: a negative-sequence current calculator that calculates a negative-sequence current, based on magnitudes of a plurality of phase currents flowing through a permanent magnet synchronous motor that rotates a load; and a deterioration diagnoser that diagnoses deterioration of a plain bearing supporting the permanent magnet synchronous motor, based on the negative-sequence current.