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:
Jun. 27, 2017
Filed:
Dec. 06, 2013
Aisin Aw Co., Ltd., Anjo-shi, Aichi-ken, JP;
Yasuo Yamaguchi, Anjo, JP;
AISIN AW CO., LTD., Anjo, JP;
Abstract
When a plurality of core plates are stacked and fixed to form a stator core for a rotary electric machine, fixation portions are set in accordance with the relative positional relationship with magnetic poles of a rotor to suppress torque fluctuations. The number of rotational buildup states which is a value obtained by dividing 360 degrees by a rotational buildup angle θs by which the core plates are rotated in units of a predetermined number of plates to be stacked, the number of magnetic poles which is the number of magnetic poles M of the rotor, and the number of fixation portions which is the number of fixation portionsare set such that the number of fixation portions is an integer number of times the number of rotational buildup states and at least common divisors of the number of fixation portions and the number of magnetic poles include '1' only or '1' or “2” only.