Johnson Electric International Ag

Johnson Electric S.a.

Ying Song Ye

Yong Li

Yue Li

Yong Qing Wang

Jian Zhao

Mao Xiong Jiang

Yan Fei Liao

Hai Jun Hua

Qing Bin Luo

Wen Ming Wu

Chi Wai Lai

Xiao Lin Ren

Hong Jiang Zhao

Zhao Sen Meng

Xian Xue Ao

Bei Bei He

A magnetic core for an electric motor has a ring-shaped yoke, teeth extending outwardly from the yoke, and a tooth tip extending from a distal end of each tooth. The core is formed from curved or coils strip laminations having teeth arranged in tooth groups. Each group has four tooth types arranged sequentially. Each tooth has left and right half tooth tips. The length of the half tooth tips vary according to tooth type. When assembled, first type tooth overlap with third type teeth and second type teeth overlap with fourth type teeth, whereby the opening of the winding slot is narrowed compared to laminations having all identical teeth.

Method of making a magnetic core with tooth having overlapping short and long teeth distal ends

Magnetic core with multiple teeth having four different teeth tips axially overlapping

A commutator has a conductive layer, a segment layer and an insulating layer separating the conductive layer and the segment layer. The segment layer includes multiple commutator segments. A mounting hole is defined along an axis of the commutator passing through the conductive layer. The three-layer structure of the commutator forms a capacitor having an increased confronting area and reduced inter-plate distance. The capacitor thus has a greater capacitance and hence greater EMI absorbing capability, making it possible to reduce EMI emissions without additional EMI reduction components outside the commutator. A rotor and a motor employing the commutator are also disclosed.

Commutator of an electric motor

Growing community of inventors

Shenzhen, China

Ying Song Ye