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:
Aug. 31, 2010
Filed:
Jan. 04, 2007
Kazuhiko Takahashi, Hitachi, JP;
Kenichi Hattori, Hitachiota, JP;
Masami Sukeda, Takahagi, JP;
Atsushi Ishihara, Hitachinaka, JP;
Takahiko Sano, Hitachi, JP;
Kazuhiko Takahashi, Hitachi, JP;
Kenichi Hattori, Hitachiota, JP;
Masami Sukeda, Takahagi, JP;
Atsushi Ishihara, Hitachinaka, JP;
Takahiko Sano, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a rotating machinery having armature windings constituted by a lot of strands, when the armature winding is constituted by four layers, a step number of the strands becomes half with respect to two layers of armature windings so as to facilitate manufacturing an armature winding of 540 degree transposition in which a transposition pitch is elongated and a circulating current loss is reduced, but since an output voltage becomes twice, for securing a voltage limit value caused by an isolation resisting force, one layer of armature windings are constituted by sub windings separated into at least two layers in a vertical direction, a transposition is independently applied to each of the sub windings, the sub windings are connected to the armature windings of the other slot while keeping an isolation of the sub winding at an armature winding end region by at least two connecting methods, and the sub winding constructs a parallel circuit by the armature windings of a plurality of slots.