(1) there is extrusion force between the enameled wires, which causes relative displacement between the enameled wires in the process of wire laying;
(2) the tension of the enameled wires changes continuously with the rotation of the spindle;
(3) the tension of the enameled wires changes continuously with the increase of the number of coil layers; The forces acting on the same layer of enameled wires and between different layers of enameled wires also change. (4) the alignment lines not only satisfy the integer circle;
(5) due to mechanical vibration, the spindle will produce relative stress and relative strain during rotation. The enameled wire is not parallel to the edge of the framework, but has a certain inclination. Suppose the tilt angle is just enough to skip a coil grid, and the enameled wire has reached the edge of the skeleton through a layered arrangement of nine grids, so that the next coil will be squeezed when the next grid is wound, there is the possibility of skipping. Therefore, the traditional winding machine is used to arrange the wire into an integer loop, and each layer of wire in the same direction in the speed and the number of turns arrangement will lead to jumper and overlap.
