Oil-Immersed Transformer Aluminum Strip
Aluminum strip for oil-immersed transformers is an essential material in the manufacturing of transformer windings. It offers characteristics such as lightweight, good electrical conductivity, and strong corrosion resistance. With the development of the power industry, the use of aluminum strip in oil-immersed transformers has become increasingly widespread.
1. Characteristics of Aluminum Strip for Oil-Immersed Transformers
 
Excellent Electrical Conductivity: Although the electrical conductivity of aluminum is slightly lower than that of copper, its light weight and low cost make it suitable for power transmission needs at certain thicknesses.
Good Ductility: Aluminum strip has good ductility, enabling it to meet the needs of repeated bending and winding during the transformer winding manufacturing process.
Oxidation Resistance and Corrosion Resistance: The surface of aluminum forms a dense oxide film, providing strong resistance to corrosion in the oil-immersed environment.
Cost Advantage: Compared to copper strip, aluminum strip is more cost-effective, which helps reduce the overall production cost of transformers.
 
2. Applications of Aluminum Strip in Oil-Immersed Transformers
High and Low Voltage Windings: Aluminum strip is commonly used in both high and low voltage windings of transformers, reducing weight and optimizing costs.
Coil Manufacturing: Due to its good processing performance, aluminum strip can maintain a compact structure when manufacturing transformer coils, improving electrical transmission efficiency.
Special Purpose Transformers: Aluminum strip is also widely used in transformers for specific applications, such as electric furnace transformers, traction transformers, and others.
 
3. Production and Processing of Aluminum Strip for Oil-Immersed Transformers
Casting and Rolling Processes: Aluminum strip is typically processed through casting and cold rolling techniques to ensure uniform thickness and good mechanical properties.
Surface Treatment: To enhance corrosion resistance and insulation properties, the surface of the aluminum strip may undergo oxidation treatment or be coated with special coatings.
Cutting and Shaping: The aluminum strip is precisely cut and wound according to the design specifications of the transformer to ensure a tight fit in the winding.
 
4. Technological Developments of Aluminum Strip for Oil-Immersed Transformers
With the rapid development of the power industry, the technology for manufacturing aluminum strips for oil-immersed transformers continues to improve. Currently, aluminum strip manufacturers are adopting advanced alloy technologies to enhance electrical conductivity and mechanical strength. Additionally, the use of nano-coatings and special oxidation treatments further improves the corrosion resistance and insulation properties of the aluminum strip.
The introduction of new manufacturing processes, such as continuous casting and rolling technologies and precision cutting techniques, has improved the dimensional accuracy and consistency of aluminum strips, thereby enhancing the overall performance of transformers. At the same time, the application of artificial intelligence and big data analysis in production processes has made quality control more intelligent and reduced waste during production.
In the future, with the development of smart grids and the widespread application of renewable energy technologies, aluminum strips will be required to meet higher electrical performance standards. Research and development of low-loss, high-strength aluminum materials will become an important direction in the industry to meet the demands of more efficient and environmentally friendly power equipment.