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:
Oct. 03, 2017
Filed:
Apr. 30, 2015
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Kenji Ikeda, Tokyo, JP;
Hiroaki Kojima, Tokyo, JP;
Motonobu Iiduka, Tokyo, JP;
Shoichi Maruyama, Tokyo, JP;
Kengo Ueda, Tokyo, JP;
Daisuke Kamegawa, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The rotating electrical machine of the present invention includes a stator coil obtained by curing the impregnating resin injected into the whole stator coil unit after an electrically insulated coil unit with a mica tape having been wrapped around a conductor is slotted into stator iron core slots via a slot liner. The high-heat-resistance resin component of the slot liner contains at least an epoxy resin having 3 or more epoxy groups. The high-heat-resistance resin component of the mica tape contains at least an alicyclic epoxy resin. The impregnating resin contains a bifunctional epoxy resin, and an acid curing agent having one acid anhydride skeleton. With the impregnating resin, the high-heat-resistance resin components of the slot liner and the mica tape form a liner cured portion and a mica insulating layer portion as an integral unit of different resin compositions inside the slot.