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:
Apr. 02, 2024
Filed:
Jun. 27, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Takaya Shimokawa, Tokyo, JP;
Hiroki Aso, Tokyo, JP;
Ryogo Takahashi, Tokyo, JP;
Kazuma Nomoto, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A motor includes a rotor and a stator provided to surround the rotor. The rotor has a rotor core having a magnet insertion hole and a permanent magnet disposed in the magnet insertion hole and is rotatable about a rotation axis. The stator has a stator core with a tooth facing the rotor, and a coil wound around the tooth. The permanent magnet has a thickness thicker than or equal to 2.1 mm in a direction in which the permanent magnet faces the stator and is magnetized in a direction of the thickness. A minimum gap AG (mm) between the rotor and the stator, a winding number Nt of the coil around the tooth, an overcurrent threshold Ip (A) for a current flowing through the coil, and a lower limit Hct (kA/m) of a coercive force of the permanent magnet satisfy Hct≥0.4×(Ip×Nt/AG)+410.