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:
Apr. 17, 2018
Filed:
Sep. 14, 2015
Fanuc Corporation, Yamanashi, JP;
Hidetoshi Uematsu, Yamanashi, JP;
Takeshi Tamaki, Yamanashi, JP;
FANUC CORPORATION, Yamanashi, JP;
Abstract
A rotor () of a motor includes a rotor core () and a plurality of magnets () which are arranged at a circumferential surface of the rotor core or at the inside of the rotor core, the length of a magnet of the plurality of magnets in the axial direction of the rotor core determined in accordance with the residual magnetic flux density of the magnet. The axial direction length of the magnet is preferably determined by multiplying a reference axial direction length of the magnet with the residual magnetic flux density of the magnet and dividing this by a reference residual magnetic flux density of the magnet.