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:
Jun. 21, 2011
Filed:
Apr. 28, 2009
Applicants:
Ji Dong Chai, Shenzhen, CN;
Bao Ting Liu, Shenzhen, CN;
Wen Liang LI, Shenzhen, CN;
Zhi Duan Shao, Shenzhen, CN;
Inventors:
Ji Dong Chai, Shenzhen, CN;
Bao Ting Liu, Shenzhen, CN;
Wen Liang Li, Shenzhen, CN;
Zhi Duan Shao, Shenzhen, CN;
Assignee:
Johnson Electric S.A., La Chaux-de-Fonds, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 21/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A servo motor, comprising a stator and a rotor disposed within the stator. The rotor has a core and magnets, covering the periphery of the core, forming a plurality of axially extending rotor poles. The rotor poles comprise a plurality of the magnets arranged axially, and the centers of adjacent magnets of a rotor pole are staggered by a mechanical angle in the circumferential direction of the rotor.