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:
Dec. 27, 2016
Filed:
Dec. 17, 2013
Fanuc Corporation, Yamanashi, JP;
Yohei Arimatsu, Yamanashi, JP;
Kenji Kawai, Yamanashi, JP;
Fanuc Corporation, Yamanashi, JP;
Abstract
A rotor of an internal permanent magnet synchronous motor including a rotor core, a plurality of slots formed in the rotor core, and a plurality of permanent magnets housed in the plurality of slots. Each of the slots includes a holding part formed between a first outside diameter surface and a first inside diameter surface to hold each of the permanent magnets, and an opening part formed at both sides of the holding part and formed by a second outside diameter surface, a second inside diameter surface and a connecting surface connecting them. The second outside diameter surface is formed to a curved shape so that a distance to an outer circumferential surface of the rotor core in the diametrical direction gradually becomes smaller from both ends of the second outside diameter surface to an intermediate part in the circumferential direction.