What Is Application Level of Aluminum Strip for Transformer Winding

Aluminum strips are widely used in the transformer field, especially in dry-type transformers and some oil-immersed transformers. In dry-type transformers, aluminum strips are often used to make high and low voltage winding. In some oil-immersed transformers, aluminum strip is also used in specialized winding designs to meet varying performance and cost requirements.

Due to its fireproof, explosion-proof, and pollution-free properties, dry-type transformers are increasingly used in locations with stringent safety and environmental requirements, such as urban power grids, high-rise buildings, subways, and airports. This has also driven a surge in demand for aluminum strip for transformer winding.

From the perspective of application scenarios, aluminum strips can be seen in large transformers in the industrial power field and small transformers in civil power distribution systems. In the industrial field, such as factories in the steel, chemical, and machinery manufacturing industries, aluminum strips are used in the transformer part of their internal power supply systems to meet the needs of stable and large-capacity power conversion; in the civilian field, the distribution transformers in the community deliver stable 220V voltage to thousands of households, and some of them also use aluminum strips to achieve efficient voltage conversion functions.

Market Share

In the transformer conductor material market, aluminum strip, thanks to its cost advantage, holds a considerable share. Compared with traditional copper strips, the price of aluminum is relatively low, which makes transformers made of aluminum strips more cost competitive, especially in the mid- and low-end transformer market.

According to relevant market research data, aluminum strips account for approximately 30%-40% of the global transformer market. In some developing countries, with the advancement of infrastructure construction and the rapid growth of electricity demand, the market share of aluminum ribbon transformers is expected to rise further.

However, in the high-end transformer market, due to the extremely high requirements for transformer performance, such as strict standards for low loss and high stability, copper strip still dominates with its excellent conductivity and mechanical properties. But overall, the wide application of aluminum strip in the transformer market makes it an indispensable and important material in the field of power transmission.

Alloy Selection

The alloys used for transformer aluminum strip are primarily based on high-purity aluminum. Common alloy grades include 1060 and 1050, with 1060 alloy being the most widely used. With an aluminum content exceeding 99.6%, 1060 alloy exhibits exceptional electrical conductivity, effectively reducing resistance losses in transformer windings during power transmission and improving overall transformer efficiency.

This alloy also exhibits excellent processability, making it easy to press-roll into aluminum strips of varying thicknesses and widths to meet diverse transformer design and manufacturing requirements. Its soft texture allows for a better fit within the transformer core structure when wound into windings, reducing winding difficulties and potential internal stresses caused by overly hard materials, thereby improving winding quality and stability.

Aluminum Strip Specifications

Transformer aluminum strip is available in a wide variety of specifications to meet the design and manufacturing requirements of various transformers. Common thicknesses range from 0.08 to 3.00 mm.

Thinner aluminum strips, such as 0.08mm and 0.1mm thick, are often used in small transformers or specially designed transformer windings that require a large number of winding turns, compact space, and relatively low current carrying capacity requirements; while thicker aluminum strips, such as 2.0mm and 3.0mm thick, are suitable for large transformers that need to carry larger currents. Thicker aluminum strips can provide sufficient conductive cross-sectional area, reduce current density, and reduce heat and resistance loss.

In terms of width, aluminum strip specifications usually range from 20-1000mm. Narrow widths, such as 20mm and 50mm, may be used for small transformer winding structures or as auxiliary conductive components. Wide widths, such as 600mm, 800mm, and even 1000mm, are often used for the main winding sections of large transformers. By winding with a wide aluminum strip formed in one step, the number of splicing points of the winding can be reduced, the contact resistance can be lowered, and the overall performance and reliability of the winding can be improved.

As one of big aluminum strip roll manufacturers in China, Haomei Aluminum has different alloys of aluminum strips for different uses. Welcome to leave message below to inquire what you need.

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