US Patent Issued to Volvo Truck on Dec. 23 for "Method and apparatus for monitoring electric motor system" (Swedish Inventors)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,969, issued on Dec. 23, was assigned to Volvo Truck Corp. (Gothenburg, Sweden).

"Method and apparatus for monitoring electric motor system" was invented by Azam Bagheri (Gothenburg, Sweden) and Atabak Taheri (Angelholm, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 ele...