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. 23, 2021
Filed:
Oct. 20, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A method and an apparatus for manufacturing a rotor of an electric motor are provided to obtain an electric motor with high efficiency. To this end, a rotor is magnetized by using a magnetizing device. The rotor includes a rotor magnet disposed in the circumferential direction of a rotor shaft, and a position detecting magnet disposed side-by-side with the rotor magnet with respect to the axial direction of the rotor shaft. The magnetizing device includes a rotor-magnet magnetizing yoke and a position-detecting-magnet magnetizing yoke that generate two magnetic fields. The two magnetic fields each have unlike poles arranged alternately in the circumferential direction and have a phase difference relative to each other in the circumferential direction. A phase difference is thus provided between the poles of the rotor magnet and the poles of the position detecting magnet.