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. 04, 2012
Filed:
Oct. 05, 2010
Shigemasa Kato, Toyohashi, JP;
Seiya Yokoyama, Toyohashi, JP;
Yoji Yamada, Hamamatsu, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Keisuke Koide, Kosai, JP;
Shinji Santo, Kosai, JP;
Shigemasa Kato, Toyohashi, JP;
Seiya Yokoyama, Toyohashi, JP;
Yoji Yamada, Hamamatsu, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Keisuke Koide, Kosai, JP;
Shinji Santo, Kosai, JP;
ASMO Co., Ltd., Kosai-shi, Shizuoka-ken, JP;
Abstract
A motor having a rotor and a stator is disclosed. The rotor is a consequent-pole rotor having a rotor core, a plurality of magnets, and a plurality of salient poles. The stator includes a plurality of teeth. A first auxiliary groove is formed in a surface of each salient pole that is opposed to the teeth. Each first auxiliary groove has first and second side surfaces facing each other in the circumferential direction. The first side surface is closer to a circumferential center of the salient pole than the second side surface. When the angle from the circumferential center line to the first side surface of each salient pole about the axis of the rotor is represented by KC1, the opening angle between the circumferential ends of the distal end of each tooth about the axis is represented by KA, and the opening angle between the circumferential ends of each salient pole about the axis is represented by KB, the following expression is satisfied: KC1=KA−KB/2.