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:
Mar. 26, 2013
Filed:
Sep. 29, 2010
Yoji Yamada, Hamamatsu, JP;
Shinji Santo, Kosai, JP;
Seiya Yokoyama, Toyohashi, JP;
Yoko Tateishi, Kosai, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Shigemasa Kato, Toyohashi, JP;
Yoji Yamada, Hamamatsu, JP;
Shinji Santo, Kosai, JP;
Seiya Yokoyama, Toyohashi, JP;
Yoko Tateishi, Kosai, JP;
Yoshiaki Takemoto, Toyohashi, JP;
Shigemasa Kato, Toyohashi, JP;
Asmo Co., Ltd., Shizuoka-ken, JP;
Abstract
A motor including a stator, a rotor, and a current supply unit. The stator includes a stator core, which has a plurality of teeth, and a plurality of coils, which are wound around the teeth. The rotor includes a plurality of magnets, which function as first magnetic poles, and salient poles, which function as second magnetic poles. Each of the salient poles is arranged between adjacent magnets spaced apart by a clearance from the magnets. When P represents the number of poles in the rotor and S represents the number of coils, a ratio P/S of the pole number P and the coil number S is represented by (4n−2)/3m (where n and m are integers that are greater than or equal to 2). The plurality of coils includes a plurality of coil groups including coils for three phases. The current supply unit executes a different current control for each coil groups.