US Patent Issued to VOLVO TRUCK on Feb. 4 for "Method for categorizing performance of an electric traction machine being a permanent magnetic synchronous motor" (Swedish Inventor)

ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,216,165, issued on Feb. 4, was assigned to VOLVO TRUCK Corp. (Gothenburg, Sweden).

"Method for categorizing performance of an electric traction machine being a permanent magnetic synchronous motor" was invented by Sebastian Hall (Hisings Backa, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for categorizing performance of a PMSM coupled to a drive shaft, and powered by a battery via an inverter. The method comprising: decoupling the PMSM from drive shaft; performing a first retardation test to measure the flux linkage of the permanent magnets, PM flux, in the PMSM; performing a second retardation test in which the inverter is disconnected...