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:
Jul. 12, 2022
Filed:
Jul. 18, 2018
Hitachi Industrial Products, Ltd., Tokyo, JP;
Yuuichirou Yoshitake, Tokyo, JP;
Shoichi Maruyama, Tokyo, JP;
Yuuki Kasai, Tokyo, JP;
Manabu Suzuki, Tokyo, JP;
Hitachi Industrial Products, Ltd., Tokyo, JP;
Abstract
A highly reliable rotating electric machine is provided in which the amount of charge discharged by partial discharge can be reduced while the machine is downsized by decreasing the thickness of insulation for coils, and it is possible to prevent paper flapping in coil end portions because of rotating wind produced by rotation of the rotor. The foregoing machine includes a stator coil including a coil conductor and a main insulation layer covering the coil conductor surface, a slot core which encloses the stator coil, and a first insulating paper sheet which is wound around the stator coil, adjoining the slot core, and a second insulating paper sheet which is wound around the stator coil, adjoining the main insulation layer, both the insulation paper sheets being placed between the stator coil and the slot core, wherein the first insulating paper sheet has a semiconductive layer abutting on the slot core and the second insulating paper sheet has a semiconductive layer located abutting on the stator coil, and an end portion of the second insulating paper sheet is exposed in an opening portion of the slot core.