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:
May. 08, 2012
Filed:
Feb. 25, 2011
Akihito Nakahara, Hitachi, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Kazumasa Ide, Hitachiota, JP;
Kazuhiko Takahashi, Hitachi, JP;
Kenichi Hattori, Hitachiota, JP;
Akihito Nakahara, Hitachi, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Kazumasa Ide, Hitachiota, JP;
Kazuhiko Takahashi, Hitachi, JP;
Kenichi Hattori, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.