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:
Aug. 27, 2002
Filed:
Feb. 21, 2001
Yutaro Kaneko, Yokohama, JP;
Shinichiro Kitada, Tokyo, JP;
Toshio Kikuchi, Yokosuka, JP;
Munekatsu Shimada, Hachiouji, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A rotor ( ) for a synchronous motor is provided with a plurality of magnets ( ) being substantially V-shaped in cross-section. The V-shaped cross-section is defined by an inner V-surface ( ), an outer V-surface ( ) and an outward face ( ) facing outwardly. A first angle &agr; is subtended between a first straight line connecting a point of intersection ( ) of the outer V-surface ( ) and the outward face ( ) and a second straight line connecting the center ( ) of the rotor ( ) and the acute angle point ( ). A second angle &bgr; is subtended between the first straight line and a third straight line connecting a point of intersection ( ) of the inner V-surface ( ) and the outward face ( ). By setting the angle &bgr; to be larger than percent of the angle &agr;, leakage flux at both ends of the magnets ( ) is reduced.