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. 21, 2014
Filed:
May. 31, 2011
Yue LI, Hong Kong, CN;
Jian Zhao, Shenzhen, CN;
Yong Wang, Shenzhen, CN;
Ya Ming Zhang, Shenzhen, CN;
Yan Hong Xue, Hong Kong, CN;
Mao Xiong Jiang, Shenzhen, CN;
Yue Li, Hong Kong, CN;
Jian Zhao, Shenzhen, CN;
Yong Wang, Shenzhen, CN;
Ya Ming Zhang, Shenzhen, CN;
Yan Hong Xue, Hong Kong, CN;
Mao Xiong Jiang, Shenzhen, CN;
Johnson Electric S.A., Murten, CH;
Abstract
A brushless motor has a stator and a rotor. The stator has a stator core with a plurality of inwardly extending salient poles and windings wound about the salient poles. The rotor has a shaft, a rotor core fixed onto the shaft, and magnets inserted in the rotor core for forming magnetic poles of the rotor. Each of the salient poles has a pole shoe with a pole face that extends along a circumferential direction confronting the rotor core and being spaced from the rotor core by an air gap. In a radial cross section of the motor, each of the magnetic poles of the rotor has an effective dimension (W) which is about 0.85 times to 1.2 times of the chord length (L) of each pole face.