The winding of the transformer adopts transposed conductor

Transposition conductor is used in the winding of large power transformer, which can greatly reduce the load loss, reduce the temperature rise of winding hot spot, improve the mechanical strength of winding, make the structure more compact, and the coil processing is more simple. Therefore, transposition conductor has been widely used in the winding design and manufacturing of large power transformer once it came out.

Transposition conductor refers to two rows of enamelled copper flat wires with wide surface in contact with each other, transposition with the same direction along the narrow surface above and below the two rows of enamelled wires as required, and multi-layer continuous and tight wrapping with electrical insulating paper tape

Transposition conductor is used in the winding of large power transformer, which can greatly reduce the load loss, reduce the temperature rise of winding hot spot, improve the mechanical strength of winding, make the structure more compact, and the coil processing is more simple. Therefore, transposition conductor has been widely used in the winding design and manufacturing of large power transformer once it came out.

In the production process of transposition conductor, the problem of poor overall dimension of transposition conductor will appear. It is often found after the next process, which is irreparable, so that the product cannot be transferred to the sequence. After the sequence transfer, the over problem will be handed over to the transformer winding process of the next process for treatment, and the insulation structure will be adjusted to affect the efficiency and product quality. Therefore, it is urgent to solve the problem of large overall dimension, width and height of transposed conductor of transformer winding, that is, to solve the unqualified quality problem of increasing radial and transverse diameter of transformer coil caused by wire.

Analyze the influencing factors of equipment and processing methods:

1. The shift head stop number of the shift conductor production line is not suitable. In production, the shift head stop is used according to the wire gauge, the shift distance is large, the tightness of the shift conductor is reduced, and the size will be large. It is one of the main factors leading to the poor overall dimension of transposition conductor.

2. Although the size of enamelled wire is within the acceptable range, the overall size of transposed wire is easy to be poor for products with small winding coil diameter and a large number of single enamelled wires of transposed wire. It is the second main factor leading to the poor overall dimension of transposition conductor.

3. The mold size control is not suitable. Although it is within the qualified range, the size of the mold size repair for a batch of products is the upper deviation, which is the third main factor leading to the poor overall size of the transposition conductor.