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:
Feb. 13, 2024
Filed:
Nov. 27, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Kodai Okazaki, Tokyo, JP;
Kenta Motoyoshi, Tokyo, JP;
Yuji Takizawa, Tokyo, JP;
Hiroko Ikeda, Tokyo, JP;
Hidenori Sasaki, Tokyo, JP;
Yu Hirotani, Tokyo, JP;
Satoru Akutsu, Tokyo, JP;
Masafumi Okazaki, Tokyo, JP;
Natsumi Sugi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A rotor core of a rotating electrical machine has interpole bridges each disposed on an outer circumferential side with respect to a permanent magnet in a non-magnetic portion between the poles, and interpole diameter bridges each surrounded by two permanent magnets and an interpole bridge. The outer circumferential surface of each interpole bridge is formed by a first flat surface. Thus, a path of a magnetic flux passing through a magnetic gap is lengthened, so that a q-axis inductance is reduced. In addition, a width in a radial direction of each interpole bridge and a width in a circumferential direction of each interpole diameter bridge are constant, and each interpole bridge and each interpole diameter bridge are disposed so as to be perpendicular to each other to form a T shape. Thus, the concentration of stress during press-fitting of the permanent magnet into a magnet hole can be reduced.