ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,483,102, issued on Nov. 25, was assigned to Mazda Motor Corp. (Hiroshima, Japan).
"Rotor structure" was invented by Naoki Itasaka (Aki-gun, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A structure of a rotor changeable of a magnetic force is provided, which includes a rotor core and a plurality of magnetic pole parts disposed therein. Each magnetic pole part includes a radially-magnetized fixed magnetic-force magnet and a circumferentially-magnetized variable magnetic-force magnet. A cavity part is disposed between the fixed magnetic-force magnet and the variable magnetic-force magnet. The cavity part has a cross-section extending from an end pa...