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:
Feb. 12, 2019
Filed:
Jun. 12, 2014
Johnson Electrica S.a., Murten, CH;
Rui Feng Qin, Hong Kong, CN;
Di Wang, Shenzhen, CN;
Ji Yu Liang, Shenzhen, CN;
Guo Dong Ren, Shenzhen, CN;
Yong Bin Li, Hong Kong, CN;
Xiao Wu Xie, Shenzhen, CN;
Yao Zhao, Shenzhen, CN;
Xian Ming Wu, Shenzhen, CN;
Sheng Han, Shenzhen, CN;
JOHNSON ELECTRIC INTERNATIONAL AG, Murten, CH;
Abstract
An electric motor includes a stator having multiple magnetic poles and a rotor rotatably mounted to the stator. The rotor includes a shaft, a commutator and a rotor core fixed to the shaft; and windings wound on the rotor core and electrically connected to the commutator. The rotor core is formed by stacking a plurality of laminations. Each lamination includes an inner ring having a hole for fixing the shaft; an outer ring radially spaced from the inner ring; multiple teeth extending outwardly from the outer ring, and multiple ribs connecting the inner ring to the outer ring. Each rib has a width w measured in a circumferential direction of the lamination. The number of ribs is n. The width w and the number n satisfy the formula: 0.75≤n×w≤64, where the width w is measured in millimeters.