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:
Nov. 01, 2011
Filed:
Jan. 19, 2011
Kenichi Hattori, Hitachiota, JP;
Tadaaki Kakimoto, Hitachi, JP;
Akitomi Semba, Hitachi, JP;
Mitsuru Saeki, Hitachinaka, JP;
Mitsunori Sezaki, Mito, JP;
Takashi Shibata, Hitachi, JP;
Kenichi Hattori, Hitachiota, JP;
Tadaaki Kakimoto, Hitachi, JP;
Akitomi Semba, Hitachi, JP;
Mitsuru Saeki, Hitachinaka, JP;
Mitsunori Sezaki, Mito, JP;
Takashi Shibata, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention aims at providing a forced cooling rotary electric machine capable of bringing temperature distribution close to a designed temperature distribution and avoiding becoming a larger size, and employs a wedge formed with ventilation grooves and a wedge not formed with the ventilation grooves to regulate the flow rates of cooling gas passing through air ducts, so that the cooling gas supplied to a part of a stator core, in which temperature is low, can be caused to flow positively to a part in which the temperature is high and the temperature distribution in the axial direction of the stator core can be uniformized. As a result, the temperature distribution in the axial direction of the stator core can be brought close to a designed temperature distribution, and a forced cooling rotary electric machine that need not be made larger in size with a margin can be obtained.