The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2025
Filed:
Jan. 09, 2024
Mazda Motor Corporation, Hiroshima, JP;
Naoki Itasaka, Aki-gun, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A rotor structure includes a rotor, a stator, and magnetic pole parts provided to a rotor core. Each magnetic pole part includes a radially-magnetized fixed magnetic-force magnet, an auxiliary fixed magnetic-force magnet disposed radially outward of the fixed magnetic-force magnet and radially magnetized in the same direction as the fixed magnetic-force magnet, and first variable magnetic-force magnets disposed at both sides of the fixed magnetic-force magnet in the circumferential direction. A magnetization state of the first variable magnetic-force magnets is changeable in the circumferential direction by a given magnetic flux. A cavity part is formed between the auxiliary fixed magnetic-force magnet and the first variable magnetic-force magnets in the circumferential direction to have a circumferential width at a position of the auxiliary fixed magnetic-force magnet in the radial direction narrower than a minimum width of a gap between the rotor core and a stator core.