Talking about the material selection of special transformers

1, iron core material

The iron core materials used in special transformers mainly include iron sheets, low silicon sheets, and high silicon sheets. Adding silicon to the steel sheets can reduce the conductivity of the steel sheets and increase the resistivity. It can reduce eddy currents and reduce losses. We usually call it In order to add silicon steel sheet to silicon steel sheet, the quality of the product has a great relationship with the quality of the silicon steel sheet used. , low silicon wafer is 9000-11000, high silicon wafer is 12000-16000,

2. Materials commonly used for winding special transformers

Enameled wire, yarn-covered wire, silk-covered wire and paper-covered wire, very commonly used enameled wire. The requirements for the wire are good electrical conductivity, sufficient heat resistance of the insulating enamel layer, and specific corrosion resistance. Under normal circumstances It is better to use the high-strength polyester enameled wire of the QZ model.

3, insulating material

In the winding transformer, the separation between the coil frame layers and the separation between the windings should be made of insulating materials. The general transformer frame material can be made of phenolic cardboard, epoxy board, or cardboard. Polyester film can be used between the layers. , telephone paper, 6520 composite paper, etc. are used for separation, and yellow wax cloth or imide film can be used for separation between windings.

4, impregnating material

After the special transformer is wound, the last step is to impregnate the insulating varnish, which can increase the mechanical strength of the product, improve the insulating performance, and prolong the service life. In general, cresol varnish can be used as the impregnating material or 1032. Insulating paint, resin paint.