Aluminum wire with a heat resistance of 220 degrees means that it is able to function properly at temperatures up to 220 degrees Celsius. This temperature resistance is achieved through the use of special aluminum alloys and thermally stable insulating materials.

   - Electrical Conductivity: Compared to copper wire, aluminum wire has a lower conductivity, which means that it will have a higher resistance than copper wire for the same current load. Therefore, when designing a transformer, it is necessary to consider the conductive ability of aluminum wire and select the appropriate wire diameter to reduce the resistance loss.
   - Density and weight: Aluminum's lower density makes aluminum wire relatively lightweight, which can lead to weight and space advantages in some applications.

Because aluminum wire operates at high temperatures, it is necessary to select a suitable heat-stabilized insulating material to protect the coil. Common heat-stabilized insulation materials include polyimide and polyamideimide, which have high heat resistance and electrical insulation properties.


   - Cost Advantage: Aluminum wire is less costly as compared to copper wire and this can reduce the manufacturing cost of transformers.
   - Lightweight: Due to the lower density of aluminum, the use of aluminum wire reduces the weight of the transformer, which can help improve ease of handling and installation.
   - Wire Diameter Selection Challenges: Due to the lower conductivity of aluminum, it is often necessary to select larger diameter aluminum wire in order to meet the same current load requirements, which can increase the size of the coil.


   - Coil design: When winding a transformer, the wire diameter, number of turns, and thickness of the insulation of the aluminum wire need to be carefully calculated and designed to meet the required current and voltage requirements.
   - Heat Dissipation and Temperature Control: Due to the higher resistance of aluminum wire, more heat may be generated. Therefore, good heat dissipation design and temperature control need to be considered when designing the transformer to ensure that the transformer will not overheat during operation.

When designing and manufacturing transformers, applicable safety standards and codes need to be followed to ensure that the equipment is safe and performs as required. This includes aspects of electrical safety, insulation and reliability.

The design and manufacture of transformers is a complex process that requires in-depth electrical engineering knowledge and experience. To ensure the safety, reliability and performance of your transformer, it is advisable to seek the help and guidance of a professional electrical engineer or electrical company. They can provide you with customized solutions based on specific application requirements.