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:
Nov. 22, 2016
Filed:
Mar. 24, 2011
HU LI, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Haruhiko Kado, Osaka, JP;
Kiyomi Kawamura, Osaka, JP;
Hu Li, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Hiroshi Murakami, Osaka, JP;
Haruhiko Kado, Osaka, JP;
Kiyomi Kawamura, Osaka, JP;
Abstract
A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M<P<(4/3)M, and M≠P, and wherein ratio (t/Ds) of teeth tip width tto stator inside diameter Ds is given by a formula 0.18<(t/Ds)<0.25.