Copper Foil

1、 Overview of Copper Foil for Transformers

The transformer copper foil is made of high-quality electrolytic copper, which has high conductivity, thermal conductivity, and strength, and is a key component in the structure of power transformers. It is usually in the form of thin sheets and is used in various windings of power transformers, playing a role in transmitting current, conducting heat, and conducting electricity.

2、 Conductive effect

The main function of copper foil is to conduct electricity. In power transformers, copper foil is used to make high and low voltage windings and neutral point windings to transmit current. High quality copper foil has excellent conductivity, which can reduce winding resistance and improve electrical energy conversion efficiency.

3、 Heat dissipation effect

Transformers generate a certain amount of heat during operation. If the heat cannot be dissipated in a timely manner, it can lead to an increase in winding temperature, which in turn affects the efficiency of transformer operation. Copper foil has excellent thermal conductivity, which can quickly transfer heat from the winding to the oil tank, and dissipate heat through the oil tank's heat dissipation system or other heat dissipation methods.

4、 Mechanical support function

Power transformers generate strong magnetic fields during operation, which may cause deformation or even short circuits in the iron core. In order to maintain the correct position of the iron core and avoid short circuits, copper foil is needed as a mechanical support to ensure that the iron core does not move or deform.

5、 Electromagnetic shielding effect

Under high load conditions, the magnetic field radiation generated by power transformers is strong, which may cause interference with surrounding equipment and even affect the lives of surrounding residents. Copper foil can be used to make electromagnetic shielding covers to reduce transformer magnetic field radiation.