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. 29, 2011
Filed:
Jul. 22, 2010
Laminated spiral core, dynamo-electric-machine rotor provided therewith, and dynamo-electric machine
Applicant:
Hiroshi Tsumagari, Fukuoka, JP;
Inventor:
Hiroshi Tsumagari, Fukuoka, JP;
Assignee:
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 15/03 (2006.01); H02K 1/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
A laminated spiral core includes core units and a plurality of swage portions. The core units form a rotor core. The core units have permanent-magnet attachment portions in which permanent magnets are to be disposed. Each of the core units has an arc shape. The plurality of swage portions connect the core units by swage-joining when the core units are spirally stacked in a predetermined number of layers. The plurality of swage portions are provided in the core units in a wave-shape to face the permanent-magnet attachment portions and provided at positions where an influence of magnetic flux paths in a rotor is minimal.