What are the factors that affect the coil size by the tension of the winding machine

The dyeing machine transformer winding machine is made of wire. There are copper wires and aluminum wires, and each layer of wires is covered with different types of insulating layers, that is, the wires are directly combined with various insulating layers to form a whole. The function of these insulating layers is to form the winding inter-turn insulation. The coil we usually use adopts a single paper-coated flat aluminum wire with a wire gauge of  to continuously wind to form a single pie coil. The size of the coil is shown in Figure 1. The dimensions, compactness, flatness and other aspects of the traction transformer cake coil must meet the technical requirements. When the coil is wound, the wire gauge and the gap between turns determine the size of the coil. The prerequisite for controlling the size of the coil is to find out the factors that affect the gap between the turns of the coil, which is also a necessary condition for controlling the size of the coil.

When using a vertical winding machine to wind a single pie coil recently, the current value of the magnetic powder clutch that controls the tension of the winding machine is set to 0.45A. After the coil is wound, the size of the B end is too large, which exceeds the process requirements. When the current value related to the tension of the vertical winding machine is set to 0.45A, it is found during the winding process that the tension is too small, resulting in uneven force on the wire on the reel. When the reel rotates, the reel idling due to inertia The phenomenon that the wire comes out more, the wire between the wire reel and the wire clamp is not in an ideal horizontal state, but sags to a certain degree, so the wire is not uniformly stressed during the winding process, and the winding is completed The compactness of the wire cake is not enough, so the size of the coil B is larger than the technical requirement value.

Properly increase the influence of the winding machine's pulling force on the coil. During the coil winding process, the tension is gradually increased, and the tension-related current value of the vertical winding machine is adjusted to 0.46A, and the coil is relaxed, as shown in Figure 2. The phenomenon of too large size has improved, but it still does not meet the requirements. Continue to increase the tension-related current value of the vertical winding machine and adjust it to 0.47A, the coil size meets the requirements, and the coil is tight, there is no obvious gap at the A and B ends, and the 4 corners are not tight or upturned. , The wire gauge change meets the requirements of the winding machine's excessive tension on the coil.

Continue to increase the tension-related current value of the vertical winding machine to 0.51A. During the winding process, the 4 corners of the coil are subjected to excessive force and upward warping. After the winding is completed, there is no obvious gap between the wires. The wire gauge did not decrease sharply. It can be seen from the above that when the tension value of the vertical winding machine is too small, after the coil is wound, the coil is small and tight, there is a gap between the wires, and the size of the B end is greater than the technical requirement value. Appropriately increasing the tension of the vertical winding machine can reduce the size of the B end of the wire cake, and it will affect the wire gauge of the wire, thereby improving the problem of the larger size of the B end. But when the tension of the vertical winding machine is too large, it will cause the coil to be small and meet the technical requirements.