ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,704, issued on May 20, was assigned to GREE ELECTRIC APPLIANCES INC. OF ZHUHAI (Zhuhai, China).
"Rotor assembly and alternating-pole motor" was invented by Bin Chen (Zhuhai, China), Quanfeng Li (Zhuhai, China), Yong Xiao (Zhuhai, China) and Jiating Ding (Zhuhai, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a rotor assembly and an alternating-pole motor. The rotor assembly includes a rotor core including permanent magnetic poles and alternating poles that are arranged alternately in a circumferential direction, each permanent magnetic pole includes a mounting groove, a permanent magnet is mounted in the mounting groove, polariti...