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:
Dec. 23, 2025
Filed:
Oct. 19, 2023
Applicant:
Volvo Truck Corporation, Gothenburg, SE;
Inventors:
Azam Bagheri, Gothenburg, SE;
Atabak Taheri, Angelholm, SE;
Assignee:
Volvo Truck Corporation, Gothenburg, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60L 3/00 (2019.01); G01R 31/34 (2020.01);
U.S. Cl.
CPC ...
B60L 3/0061 (2013.01); B60L 3/003 (2013.01); B60L 2210/42 (2013.01); B60L 2240/526 (2013.01);
Abstract
A method and an apparatus are provided to monitor an electric motor drive system. Samples of a three-phase current waveform associated with the electric motor system are obtained. The samples of the three-phase current waveform are transformed into two orthogonal signals. A covariance matrix is generated from the two orthogonal signals. A fault type and a fault location in the electric motor system is determined based on the covariance matrix.