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:
Jun. 07, 2016
Filed:
Dec. 27, 2011
Atsushi Matsuoka, Tokyo, JP;
Kazuhiko Baba, Tokyo, JP;
Atsushi Matsuoka, Tokyo, JP;
Kazuhiko Baba, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A magnet constituting a magnetic pole of a rotor includes an annular ferrite bond magnet provided on an outer circumference of a rotation shaft and a plurality of sintered ferrite magnets arranged on an outer circumference of the ferrite bond magnet. The ferrite bond magnet includes, on an outer circumferential surface thereof, curved concave portions convexed toward a side of the rotation shaft. The sintered ferrite magnets are arranged on the curved concave portions, and include a surface on a side of the stator that is formed in a curved convex shape toward the side of the stator, and a center portion whose thickness with respect to the circumferential direction is formed to be larger than a thickness of an edge portion, wherein magnetization direction is oriented in polar anisotropy.