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. 10, 2014
Filed:
Apr. 22, 2011
Bao Ting Liu, Shenzhen, CN;
Ji Cheng Pan, Shenzhen, CN;
Ji Dong Chai, Shenzhen, CN;
Xu Hai Wei, Shenzhen, CN;
Bao Ting Liu, Shenzhen, CN;
Ji Cheng Pan, Shenzhen, CN;
Ji Dong Chai, Shenzhen, CN;
Xu Hai Wei, Shenzhen, CN;
Johnson Electric S.A., Murten, CH;
Abstract
An electric motor has a stator and a rotor magnetically coupled to the stator. The rotor has a shaft, a rotor core fixed to the shaft and having a plurality of teeth, a commutator fixed to the shaft adjacent the rotor core and having a plurality of segments, and rotor winding units wound about the teeth and connected to the segments. Brushes arranged in sliding electrical contact with the commutator transfer power to the rotor. Each of the rotor winding units has at least two subcoils directly connected in series to each other and separated from each other by at least one tooth. An initial subcoil and a final subcoil of each rotor winding unit are respectively directly connected to two adjacent segments.