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:
Sep. 27, 2022
Filed:
Aug. 08, 2019
Nidec Corporation, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A motor includes a stationary unit including a stator and a rotation unit including a magnet unit disposed radially outward of the stator and a cylindrical rotor holder. The magnet unit is held on a radially inside surface of the rotor holder. The magnet unit includes first magnets each of which has N and S poles magnetized in a radial direction, and second magnets each of which has N and S poles magnetized in a circumferential direction. Magnetic poles of radially inner end portions of the first magnets adjacent to each other in the circumferential direction via the second magnet are different from each other. Magnetic poles of circumferential end portions of the second magnets adjacent to each other in the circumferential direction via the first magnet are different from each other. An interval is provided between a radially outside surface of each first magnet and the radially inside surface of the rotor holder, and between a radially outside surface of each second magnet and the radially inside surface of the rotor holder.