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. 06, 2019
Filed:
Sep. 30, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Yuji Takizawa, Tokyo, JP;
Satoru Akutsu, Tokyo, JP;
Masafumi Okazaki, Tokyo, JP;
Hiroshi Aida, Tokyo, JP;
Yu Hirotani, Tokyo, JP;
Kazumasa Ito, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
It has been discovered that torque ripples can be reduced by adopting a shape in which: the width of a shoe connection formed in a stator of a permanent magnet motor is equal to or smaller than the thickness of each of core pieces constituting a stator core; and a relationship of 0.7≤Wm/(Tm×Gm)≤3.3 is satisfied, where Wm is the length of the long side of a flat plate-shaped permanent magnet embedded in a rotor, Tm is the length of the short side of the permanent magnet, and Gm is the maximum distance from the outer circumference of the rotor to the permanent magnet.