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. 01, 2011
Filed:
Aug. 14, 2007
Keiichiro Kaihatsu, Kamagaya, JP;
Takeshi Obata, Narashino, JP;
Kenichi Saito, Narashino, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
In a rotary electric machine, for enhancing the reliability and reducing the size thereof, the rotary electric machine comprises a stator, and a rotor opposed to the stator and adapted to be rotated around a shaft, the rotor having an iron core formed therein with a plurality of axial holes formed in the iron core, a plurality of conductor bars inserted respectively in the holes, and end rings provided at the end parts of the conductor bars, wherein the outer peripheral parts of the end rings are electrically and mechanically joined to the conductor bars through friction stir welding, and the one end part of the conductor bar is axially projected from the end ring. With this configuration, it is possible to enhance the capability of heat radiation from the rotary electric machine and to enhance the design freedom of component parts around the stator and the rotor.