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:
May. 11, 2021
Filed:
Sep. 18, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Takaya Shimokawa, Tokyo, JP;
Kazuhiko Baba, Tokyo, JP;
Koji Yabe, Tokyo, JP;
Tomoaki Oikawa, Tokyo, JP;
Mineo Yamamoto, Tokyo, JP;
Hiroyuki Ishii, Tokyo, JP;
Junichiro Oya, Tokyo, JP;
Hiroki Aso, Tokyo, JP;
Yuto Urabe, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A permanent-magnet synchronous motor includes: an annular stator core; a cylindrical rotor disposed inside the stator core, and having a first end face in an axial direction of the stator core and a second end face in the axial direction; a disk-shaped sensor magnet having a plurality of magnetic poles disposed circumferentially, and having a third end face and a fourth end face; and a magnetic sensor disposed so as to be opposed to the fourth end face in the axial direction, and detecting a rotating position of the sensor magnet. When a first thickness means the axial thickness at the center of each of the magnetic poles and a second thickness means the axial thickness of an inter-magnetic-pole portion between adjacent magnetic poles of the magnetic poles, the second thickness is greater than the first thickness.