ALEXANDRIA, Va., July 3 -- United States Patent no. 12,348,085, issued on July 1, was assigned to Huawei Digital Power Technologies Co. Ltd. (Shenzhen, China).
"Motor rotor and motor" was invented by Bin Lai (Dongguan, China), Hua Lan (Shanghai), Mengde Li (Shanghai) and Zijing Wang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "This application provides a motor rotor, including a rotor iron core and a plurality of permanent magnets disposed on the rotor iron core. Coercive forces of at least some permanent magnets are continuously gradiently distributed or gradiently distributed in a multi-stage manner from the middle to both ends along at least one direction perpendicular to a magnetizatio...