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:
Apr. 20, 2004
Filed:
Mar. 31, 2000
Kazumasa Ide, Hitachiohta, JP;
Kenichi Hattori, Hitachi, JP;
Akiyoshi Komura, Hitachi, JP;
Mitsunori Yamashina, late of Hitachi, JP;
Tadashi Sonobe, Iwaki, JP;
Akitomi Semba, Hitachi, JP;
Junji Sato, Hitachi, JP;
Ryoichi Shiobara, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotating electric machine exhibits a substantially level axial temperature rise distribution by supplying a coolant which is sufficiently cooled to a central portion of an iron core which is most distant from each of the axial ends of the iron core. A plurality of ventilating passages, which continuously extend in the peripheral direction, are provided in the axial direction between a stator frame and a stator iron core, and coolers are provided in the ventilating passages. A coolant boosted by a booster is cooled by the coolers and is allowed to flow to a central portion of the stator iron core in the direction from the outer peripheral side to the inner peripheral side of the stator iron core via ventilating passages which communicate with the central portion of the stator iron core.