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:
Feb. 04, 2014
Filed:
Jul. 18, 2011
Yoshiaki Takemoto, Toyohashi, JP;
Shigemasa Kato, Toyohashi, JP;
Seiya Yokoyama, Toyohashi, JP;
Keisuke Koide, Kosai, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Shigemasa Kato, Toyohashi, JP;
Seiya Yokoyama, Toyohashi, JP;
Keisuke Koide, Kosai, JP;
Asmo Co., Ltd., , JP;
Abstract
A motor including a rotor and a stator. The rotor includes a rotor core, magnet pole portions, and core pole portions. First magnetic pole portions, which are the magnet pole portions or the core pole portions, each include a first and second opposing parts arranged in an axial direction. Each first opposing part includes an auxiliary groove, and each second opposing part does not include an auxiliary groove. Where M(°) represents an open angle of the first magnetic pole portion, G(°) represents an open angle of the void, and L represents the number of teeth, an angle Dfrom a center line in the circumferential direction of the first magnetic pole portion to the side surface in the auxiliary groove that is closer to the center line in the circumferential direction satisfies D=M/2+G−a×360(°)/L (where a is a natural number).