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. 01, 2009
Filed:
Apr. 17, 2007
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Yukinori Nakagawa, Fukui, JP;
Masahiko Morisaki, Fukui, JP;
HU LI, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Yukinori Nakagawa, Fukui, JP;
Masahiko Morisaki, Fukui, JP;
Hu Li, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A motor includes a stator with an annular stator yoke, a stator core having a plurality of inner and outer teeth projecting from the stator yoke toward inside and outside respectively, a plurality of coils wound on the stator core, and an inner rotor and an outer rotor confronting the inner and outer teeth respectively via an air-gap, and having an permanent magnet respectively. The number of slots 'S' and the number of poles 'P' establish a relation of S:P=3:2N−1, where N is an integer equal to 1 or more, and a case when 2N−1 becomes a multiple of 3 is excluded.