ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,237,725, issued on Feb. 25, was assigned to NIDEC Corp. (Kyoto, Japan).
"Rotor, rotary electric machine, and drive apparatus" was invented by Kuniaki Tanaka (Kyoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a rotor, magnetic poles having a pair of first magnets and second magnets are provided along a circumferential direction. The magnetic pole includes a pair of first flux barrier portions radially outside the first magnets, and a pair of second flux barrier portions between the pair of first flux barrier portions in the circumferential direction. The first flux barrier portion has a first end close to the adjacent second flux barrier por...