Electric motor

摘要

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.

主权项

1. 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; and wherein the center of gravity of the entire winding is essentially situated at the geometric center of the rotor,
wherein the winding comprises an inner winding layer, a middle winding layer and an outer winding layer; and each winding layer comprises four coils, and each coil spans three teeth, whereby the line connecting the centers of gravity of each coil in the same winding layer forms a square.