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:
Oct. 14, 2025
Filed:
Apr. 26, 2021
Nidec Corporation, Kyoto, JP;
Ta-Yin Luo, Taipei, TW;
Yu-Wei Hsu, Taipei, TW;
Sheng-Chan Yen, Taipei, TW;
Pei-Chun Shih, Taipei, TW;
Hsin-Nan Lin, Taipei, TW;
Guo-Jhih Yan, Taipei, TW;
Cheng-Tsung Liu, Kaohsiung, TW;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A motor includes a rotor and a stator, the rotor includes flux barriers. In a plane orthogonal to an axial direction, at least two flux barriers corresponding to each pole of the rotor are located entirely within an extending angle. A magnitude of the extending angle is determined by a number of poles of the rotor and phases of the motor. A center line of the extending angle is a q-axis of the rotor. A ratio between an area of the flux barrier entirely located within the extending angle and an area of all flux barriers corresponding to the pole is about ½ or more, and a ratio between an area of a radially innermost flux barrier entirely located within the extending angle and an area of a radially outermost flux barrier entirely located within the extending angle and a smaller one of the two areas is about 10% or less.