Causes of winding machine affecting coil size

Transformer winding machine is made of wire winding. The wire has copper and aluminum wire, each layer of wire between the cover different types of insulation layer, that is, the wire directly combined with a variety of insulation layer into a whole, the role of these insulation layer is to constitute the winding of inter-turn insulation.

We usually use the coil using the wire gauge of 2.2 * 2.5mm single paper wrapped flat aluminum wire continuous winding constitute a single pie type coil. Traction transformer pie type coil shape and size, tightness, flatness and other aspects are required to meet the technical requirements.

Coil winding, wire gauge and inter-turn gap resolution of the coil size, the prerequisite for controlling the size of the coil is to find out the elements that affect the gap between the turns of the coil, which is also a necessary condition for controlling the size of the coil.

1, the coil size problem

The recent use of vertical winding machine winding single pancake coil, control the winding machine pulling force of the magnetic powder clutch current value set to 0.45A, coil winding completed B-end size are large, over the range of process requirements.

2, the coil size problem cause analysis

When the winding machine tension-related current value is set to 0.45A, the winding process found that the tension is too small, resulting in uneven force on the wire on the coil, when the coil rotates due to the phenomenon of inertia coil idle, the wire off more, resulting in the wire between the coil and the wire clamping device is not the ideal degree, but sagging out of a certain arc, so the wire in the winding process is uneven force The winding process is not uniform, and the finished wire cake tightness is not enough, thus resulting in the coil B size is greater than the technical request value.

3, winding machine tension and coil size relationship analysis

(1) the appropriate increase in winding machine tension on the impact of the coil. In the coil winding process, gradually increase the tension, the tension-related current value of the vertical winding machine is adjusted to 0.46A, the coil slack. The phenomenon of large size has improved, but still does not meet the requirements. Continue to increase the tension of the vertical winding machine to adjust the current value to 0.47A, the coil size to meet the request, and the coil is tight, there is no obvious gap in the A, B end, the four corners are not taut or warped phenomenon, the wire gauge changes to meet the request.

(2) the winding machine pulling force is too large for the coil. Continue to increase the vertical winding machine tension-related current value to 0.51A, the coil in the winding process, the four corners of the force is too heavy, there is the phenomenon of upturn, after the completion of winding, the wire asked no obvious gap, the wire gauge does not sharply reduced, but the four corners of the phenomenon of upturn, does not meet the technical requirements.

It can be seen from the above, when the vertical winding machine tension value is too small, the coil winding is completed, the coil is small and tight, the wire asks a gap, and the B-end size is greater than the technical requirements of the value. Appropriate increase in the vertical winding machine tension can reduce the size of the B end of the line cake, and small impact on the wire line gauge, so as to improve the B end of the size of the problem of large. But when the vertical winding machine tension is too large, and will cause the coil small to meet the technical requirements. This shows that the tension and coil size is closely related to the coil winding, winding machine tension to adjust to the corresponding matching value.

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