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:
Aug. 25, 2026
Filed:
Apr. 27, 2023
Mitsubishi Electric Corporation, Tokyo, JP;
Masahito Miyoshi, Tokyo, JP;
Yuichiro Nakamura, Tokyo, JP;
Kenta Motoyoshi, Tokyo, JP;
Takumi Tomatsu, Tokyo, JP;
Yoshinori Motonishi, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A bearingless motor as an electromagnetic rotary machinery includes a rotor and a stator disposed with a gap therebetween, and generates a bearing force that causes the rotor to levitate without contact, by an electromagnetic force or a magnetic force. A stator core includes a back yoke and a plurality of teeth. The teeth each include a tooth body and a tooth tip that is flange shaped. The rotor includes a rotor core and a plurality of permanent magnets. Permeance, which is an amount representing the ease of flowing of magnetic flux, of at least one of the gap and iron cores in a magnetic circuit that goes around the stator and the rotor along a radial direction and a circumferential direction decreases in one direction from one end side to another end side in an axial direction.