Transformer aluminum winding Wire

May 13, 2023

Transformer aluminum winding wire include paper laminated aluminum foil, paper wrapped aluminum wire, fiber glass insulated aluminum wire, and enamelled aluminum wire.

In recent years, the windings of transformers have begun to use aluminum tape as the conductor material. As everyone knows, due to insufficient copper sources and high prices, many manufacturers widely use aluminum wires instead of copper wires. Since the unit resistance of aluminum wires is 64% larger than that of copper wires, this replacement will increase the size of the transformer. Using aluminum strips instead of copper wires can eliminate the need to increase the overall dimensions of the windings. Moreover, aluminum strip winding has certain advantages over copper wire winding: because the temperature of all sections of the winding is relatively uniform, the cooling of the winding is improved; because the magnetic potential of the winding is evenly distributed along the height of the high and low winding, the axial force is the smallest when short-circuited; due to the inter-turn The capacitance is evenly distributed along the winding, and the winding increases the stability of the impact overvoltage; it is convenient to realize the mechanization of the winding winding process. However, in the existing aluminum tape winding, paper tape or synthetic film is placed between the layers of the aluminum tape during the winding process to serve as inter-turn insulation. Insulating tape protruding from the aluminum tape is used to ensure insulation at both ends of the winding.

Transformer aluminum winding wire with paper is a high-quality aluminum electrical wire wrapped by insulating paper from DuPont. The electrical, chemical and mechanical integrity of the insulating paper is extremely high, and the elasticity, flexibility, tear resistance, moisture resistance and abrasion resistance are very good, and it is very resistant to acid and alkali corrosion. It can be used with all kinds of varnishes and adhesives. , Transformer fluids, lubricants and refrigerants are compatible. Since the product is not easily digested, it is not easily destroyed by insects, fungi and molds. When the temperature of the product is not higher than 200℃, its electrical and mechanical properties are basically not affected; even if the product is continuously exposed to a high temperature of 220℃, it can be maintained for at least 10 years for a long time. Aromatic polyamide paper-coated aluminum wire wrapped by extruded bare aluminum wire has better mechanical and electrical properties. It can replace the difficult composite enameled flat wire, suitable for transformers, lifting electromagnets, and electric welding. Machine and other products winding.

Enamelled transformer aluminum winding wire is mainly used as the conductor material of the moving coil. Due to the low density of aluminum, the weight of the aluminum coil can be reduced to one third of that of the copper coil. This advantage of enameled aluminum wire can make the acceleration of moving parts easier and more effective, thereby improving product performance, such as shortening the hard disk access time, and improving the sound quality and sensitivity of speakers and voice coils. Most of these applications use self-adhesive aluminum wire.
We can provide aluminum wire with a diameter of 0.030 mm to 0.500 mm (AWG 48-24), and there are a variety of insulating paints and self-adhesive paints to choose from. All aluminum wires comply with the EN AW-1350A (E-A1) standard of the electronics industry and are guaranteed to meet the electrical conductivity requirements.

Transformer aluminum winding Wire

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