The coil of the transformer is the core of the transformer equipment. The performance of the transformer largely depends on the material of the coil. At the same time, the development and use of the coil material also represents the technological advancement of the manufacturer. With the development of science and technology, many epoxy dry-type transformer manufacturers at home and abroad have used aluminum foil as the coil conductor material, and the characteristics and quality of the aluminum foil coil have been highly evaluated.
 

 
Advantages of aluminum foil winding transformer:
 
1. Due to the aluminum foil type coil, it occupies less space than the cylindrical coil conductor, and the effective working area is increased. As a result, the epoxy dry-type transformer using the aluminum foil coil is better small and lightweight.
2. Suppress thermal stress. The coils of epoxy dry-type transformers will have temperature changes due to load changes during operation. Since the thermal expansion coefficient of the epoxy resin and the conductor in the coil are different, thermal stress will be generated. The use of aluminum foil coils can reduce the thermal stress generated. Compared with copper, the thermal expansion coefficient of aluminum is closer to that of epoxy resin, which reduces thermal stress and improves the crack resistance of epoxy transformers.
3. High insulation reliability. The aluminum foil coil adopts a layer-by-layer casting method, and the voltage between turns is generally only the potential of each turn. Therefore, the inter-turn voltage can be controlled to a minimum, and the insulation strength of the aluminum foil coil is due to the cylindrical coil.
4. The safety of impact。
 

The coil of epoxy dry-type transformer is produced and manufactured with aluminum foil conductor, which is not only technically reliable, but also economical. Choosing epoxy dry-type transformers with aluminum foil coils can reduce investment and operating costs.