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:
Dec. 07, 2010
Filed:
Apr. 05, 2010
Daisuke Kori, Hitachinaka, JP;
Tetsuo Fujigaki, Hitachi, JP;
Shuji Aizawa, Hitachi, JP;
Motonobu Iizuka, Hitachi, JP;
Yasushi Iwai, Mito, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Mamoru Kimura, Hitachi, JP;
Daisuke Kori, Hitachinaka, JP;
Tetsuo Fujigaki, Hitachi, JP;
Shuji Aizawa, Hitachi, JP;
Motonobu Iizuka, Hitachi, JP;
Yasushi Iwai, Mito, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Mamoru Kimura, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A permanent magnet electrical rotating machine having a permanent magnet rotor and a stator, wherein: a plurality of permanent magnets are disposed in a rotor iron core of the permanent magnet rotor along a periphery of the rotor iron core, polarities thereof being alternately changed; a cooling airflow channel is formed between each pair of adjacent opposite poles on the rotor iron core; and the cooling airflow channel has an approximately trapezoidal shape on an outer periphery side of the rotor iron core; and extends from an end on a central side in a radial direction of the approximately trapezoidal shape to a radial center.