Welcome to HuaSheng Aluminum, the leading factory and wholesaler of Transformer Winding Aluminium Foil. Our commitment to quality and innovation has made us a trusted name in the industry. On this webpage, we will guide you through the importance of aluminium foil in transformer winding, its properties, specifications, alloy selection, manufacturing process, and frequently asked questions.

Why Choose Aluminium Foil for Transformer Coil Winding?

Aluminium foil is a critical component in the manufacturing of transformers due to its unique set of advantages:

Electrical Conductivity and Electrical Characteristics

Aluminium foil has excellent electrical conductivity, effectively transmitting electric current and reducing resistive losses. This enhances the electrical efficiency of transformers, making energy conversion more efficient.

Lightweight and Size Optimization

Compared to traditional wires, aluminium foil is lighter, significantly reducing the overall weight of transformers. This weight reduction lowers transportation and installation costs and facilitates equipment mobility and maintenance.

Corrosion Resistance and Durability

Aluminium foil exhibits good corrosion resistance, maintaining its structure and performance over extended periods. This property is crucial for transformers operating long-term and exposed to various environmental conditions, extending equipment lifespan.

Processability and Production Efficiency

Aluminium foil is soft and easy to process, suitable for complex transformer coil winding. Using aluminium foil can simplify manufacturing processes, improve production efficiency, and reduce production costs.

High Temperature Operation and Reliability

Aluminium foil can operate stably at high temperatures, maintaining its electrical characteristics unaffected. This capability enhances the reliability and stability of transformers under various operating conditions.

Properties of Aluminium Foil for Transformers

Our aluminium foil is crafted to meet the highest industry standards:

High Purity and Quality

The aluminium foil used in transformers is typically of high purity, often exceeding 99.5%. This ensures minimal impurities that could compromise the electrical properties of the foil.

Excellent Electrical Conductivity

Aluminium possesses excellent electrical conductivity, making it an ideal choice for transformer applications. High conductivity ensures efficient energy transfer within the transformer, minimizing energy losses.

Thermal Conductivity

Aluminium foil exhibits good thermal conductivity, aiding in the dissipation of heat generated during transformer operation. Efficient heat dissipation is crucial for maintaining the transformer’s temperature within acceptable limits.

Formability and Flexibility

Aluminium foil is malleable and can be easily formed into the required shapes during the transformer winding process. Its flexibility allows for the creation of intricate winding patterns, optimizing the space within the transformer and enhancing its overall efficiency.

Aluminium Foil For Transformer Winding Specifications

HuaSheng Aluminum offers a range of specifications to cater to various transformer designs and requirements:

Electrical Conductivity of Aluminium Foils

Our aluminium foils are guaranteed to meet or exceed the following conductivity standards:

Advantages of Aluminium Foil in Transformer Coil Winding

Our aluminium foil offers several advantages that make it superior for transformer winding applications:

Superior Processing Performance

Aluminium foil exhibits excellent processing capabilities, allowing it to be easily shaped into various complex cross-sectional forms as per user requirements. This flexibility enables precise adherence to design specifications during transformer production.

High-Quality Surface

Aluminium foil maintains strict surface quality standards, ensuring uniform magnetic field distribution during transformer operation. This is crucial for reducing eddy current losses and improving transformer efficiency.

Excellent Electrical and Thermal Conductivity

Aluminium foil possesses outstanding electrical and thermal conductivity, facilitating efficient current conduction and heat dissipation under normal operating conditions in transformers. This is essential for minimizing resistive losses and maintaining stable transformer operation.

Good Magnetic Performance

Aluminium foil exhibits excellent magnetic properties, ensuring reliable transformer operation under various working conditions. It helps reduce hysteresis losses, thereby enhancing energy efficiency and performance stability.

High Strength and Good Ductility

Aluminium foil offers high tensile strength and good elongation, allowing it to withstand complex operating environments and varying mechanical stresses within transformers. This ensures long-term reliability and durability of transformers.

Aluminium Foil Alloy Selection for Transformer Winding

We offer a variety of alloys to meet different transformer requirements:

1050 Aluminium Foil

• Electrical Conductivity: Better than 60% ACS.
• Properties: High electrical conductivity, good formability, and weldability.
• Common Uses: Distribution transformers, Power transformers.

1060 Aluminium Foil

• Electrical Conductivity: Better than 61.5% ACS.
• Properties: Excellent electrical conductivity, good corrosion resistance.
• Common Uses: Power transformers, Instrument transformers.

1070 Aluminium Foil

• Electrical Conductivity: Better than 62.7% ACS.
• Properties: High electrical conductivity, good formability.
• Common Uses: Power transformers, Distribution transformers.

1350 Aluminium Foil

• Electrical Conductivity: Better than 62% ACS.
• Properties: High purity (99.5% or higher), excellent electrical conductivity.
• Common Uses: High-voltage and extra-high-voltage transformers, Dry-type transformers.

Chemical Composition of Aluminium Foils

Our aluminium foils are composed of high-purity aluminium with trace amounts of other elements to enhance their properties:

1050 O Aluminium Foil

1060 O Aluminium Foil

1070 O Aluminium Foil

1350 O Aluminium Foil

Manufacturing Process

Our manufacturing process ensures the highest quality and performance of our aluminium foil:

1. Casting and Rolling: The selected aluminium alloy undergoes a casting process to create large ingots. These ingots are then hot-rolled into thin sheets, which serve as the basis for the transformer foil.

2. Annealing: The rolled aluminiumsheets undergo an annealing process to enhance their softness and conductivity. Annealing involves heating the material to a specific temperature and then slowly cooling it to achieve the desired properties.

3. Layered Winding: Aluminium foil is used in the winding process of transformers, forming layers between the transformer’s primary and secondary windings. The layered configuration helps optimize the magnetic flux and reduces losses.
4. Insulation: Insulating materials are often interleaved with the aluminium foil to prevent short circuits and ensure the reliable performance of the transformer.

Why Use an Aluminium Foil Strip for HV Transformer Winding?

Aluminium foil strips are used for high-voltage transformers with thickness and width ranges from 0.1mm to 3.0mm, and 10mm to 1370mm, respectively. Tempered aluminium alloys like 1060 O and 1070 O are generally used for HV transformers. High-grade insulating foils are placed between aluminium foil strips. Mostly 1060 and 1070 alloys of aluminium are used to wind the high-voltage transformer windings. The relatively high windings exhibit good ageing qualities under all operating conditions and are corrosion-proof. For HV transformer windings, an aluminium foil strip provides a basic winding method with high electrical safety.

Frequently Asked Questions (FAQ)

1. Why is aluminium foil used in transformer winding? Aluminium foil is used in transformer winding due to its high electrical conductivity, formability, and thermal conductivity. It serves as a conductor in the transformer windings, facilitating efficient energy transfer.
2. What thickness of aluminium foil is suitable for transformer winding? The thickness of aluminium foil for transformer winding varies based on the specific requirements of the transformer. It is typically in the range of 10 to 20 microns, but thicker foils may be used for certain applications.
3. How is aluminium foil protected during transportation and storage? Aluminium foil for transformer winding is often protected with appropriate packaging materials such as moisture-resistant films and cartons. These materials shield the foil from moisture, dust, and other environmental factors.
4. What are the insulation properties of aluminium foil for transformer winding? Aluminium foil may undergo treatments or have coatings to enhance its insulation properties. This is crucial to prevent electrical breakdowns within the transformer and ensure safe and reliable operation.
5. Can aluminium foil be used in all types of transformers? Aluminium foil is commonly used in various types of transformers, including distribution transformers, power transformers, and instrument transformers. The specific alloy and thickness may vary based on the transformer’s design and application.
6. How is the formability of aluminium foil maintained during packaging? Proper handling and packaging techniques are employed to maintain the formability of aluminium foil. Packaging materials are chosen to avoid any damage or deformities to the foil during transportation and storage.
7. Are there specific standards for aluminium foil used in transformer winding? Yes, there are industry standards and specifications that define the requirements for aluminium foil used in transformer winding. Manufacturers adhere to these standards to ensure the quality and performance of the foil in transformers.