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. 09, 2004
Filed:
Feb. 12, 2002
Applicant:
Inventors:
Yutaro Kaneko, Yokohama, JP;
Shinichiro Kitada, Tokyo, JP;
Toshio Kikuchi, Yokosuka, JP;
Takashi Tsuneyoshi, Yokohama, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 2/112 ;
U.S. Cl.
CPC ...
H02K 2/112 ;
Abstract
A motor or a generator which has permanent magnets on a moveable member effectively reduces eddy current loss in the permanent magnets. A permanent magnet which is provided for the moveable member of a motor or a generator, for example the rotor of a rotating motor, is divided into magnet sections ( A- E) having divided widths (t -t ) in response to the rate of change in the flux density in each divided magnet. Thus the eddy current loss in each magnet section ( A- E) can be substantially equalized.