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:
Jul. 14, 2015
Filed:
Aug. 10, 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 and stator windings. The stator core has a stator yoke and teeth extending radially inwardly from the stator yoke. The stator windings are formed by concentrated coils wound on the teeth. The rotor has a rotor shaft, a rotor core fixed to the rotor shaft and magnets fixed in slots formed in the rotor core. Each magnet is plate shaped and extends in both axial and radial directions of the rotor and each magnet is magnetically charged across its thickness so that a rotor pole is formed between two adjacent magnets. The ratio of the radial thickness (Y) of the stator yoke to the width (T) of the tooth body is from 0.4 to 0.7.