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:
Nov. 05, 2019
Filed:
Jul. 29, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Yoshikazu Fujisue, Tokyo, JP;
Kazuya Kumagai, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A stator of an electric motor () has windings () and a stator core () in which eighteen teeth (), around which the windings () are wound, are formed circumferentially. A rotor of the electric motor () has magnets () and a rotor core () in which six insertion holes (), into which the magnets () are inserted, are formed circumferentially. The magnets () are rare-earth magnets of a grain boundary diffusion type having a residual magnetic flux density Br of from 1.36 to 1.42 T. The total area of magnet-parallel cross-sections () of the teeth () is from 0.56 times to 0.93 times the total area of tooth-facing surfaces () of the magnets ().