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US 9,543,798 B2Granted
Electric motor
AssigneeJohnson Electric S.A.
InventorsJames Ching-Sik Lau, Chun Kit Cheung, Duncan Yiu Lung Wong, Xiao Jun Yang
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AssigneeJohnson Electric S.A.
InventorsJames Ching-Sik Lau, Chun Kit Cheung, Duncan Yiu Lung Wong, Xiao Jun Yang
Estimating the term…
A rotor for an electric motor has an iron core and a winding wound about teeth of the rotor core. Slots are formed between the teeth to accommodate coils of the winding. The winding includes several layers of windings distributed in the radial direction of the rotor. Each winding layer has a plurality of coils with the coils of each winding layer being wound on the teeth in the circumferential direction of the rotor. The overall center of gravity of the winding layers is substantially positioned at the geometric center of the rotor. Thus the center of gravity of the entire winding is located substantially at the geometric center of the rotor, thereby preventing noise caused by unstable rotation due to the deviation between the center of gravity of the winding and the geometric center of the rotor.
A rotor of an electric motor, comprising an iron core and a winding wound on the iron core, wherein the iron core comprises a plurality of teeth and slots positioned between adjacent teeth, the winding comprises a plurality of winding layers distributed in the radial direction of the rotor, each winding layer comprises a plurality of coils, and the coils in each winding layer are wound about corresponding teeth in the circumferential direction of the rotor;
An electric motor comprising a stator and a rotor that rotates with respect to the stator;
Dependencies are inferred from the claim text.