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. 22, 2022
Filed:
Jan. 24, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Kazuhiko Baba, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A motor includes a rotor rotatable in a rotating direction about an axis, and a stator surrounding the rotor. A rotor core includes a magnet insertion hole corresponding to one magnetic pole, and a plurality of slits on an outer side of the magnet insertion hole in the radial direction. The slits include a first slit located most upstream in the rotating direction. Each slit has a tip portion and a root portion. The tip portion of the first slit is located upstream of the root portion of the first slit in the rotating direction, and is located upstream of a magnetic pole center in the rotating direction. The root portions of the slits are disposed more in number in a second region downstream of the magnetic pole center in the rotating direction than in a first region upstream of the magnetic pole center in the rotating direction.