Aluminum wire refers to its full longitudinal length and uniform cross section, which refers to the metal linear material made of pure aluminum or aluminum alloy. The products are processed along the center pressure and delivered in rolls. Cross section shapes include circle, ellipse, square, rectangle, equilateral triangle and regular polygon. It is divided into pure aluminum wire and alloy aluminum wire according to material.
 

According to the alloy, it can be divided into 1060, 2011, 2014, 2017, 2024, 3003, 4032, 5005, 5052, 5154, 5056, 5083, 6201, 6106, 6011, 6351, 6060, 6061, 6262, 6063, 6082, 7001, 7003, 7005, 7050, 7075 and 1100 aluminum wire. According to the purpose, it can be divided into industrial aluminum wire and process aluminum wire, and magnet wire is an aluminum wire widely used in industrial aluminum wire

 

Aluminum magnet wire, also known as winding wire, is an insulated wire used to manufacture coils or windings in electrical products. Electromagnetic wires are usually divided into enamelled wires, wrapped wires, enamelled wrapped wires and inorganic insulated wires.

Electromagnetic wire is an insulated wire used to manufacture coils or windings in electrical products. Also known as winding wire. The electromagnetic wire must meet the requirements of various use and manufacturing processes. The former includes its shape, specification, short-term and long-term work under high temperature, strong vibration in some occasions and centrifugal force at high speed, corona and breakdown resistance under high voltage, chemical corrosion resistance under special atmosphere, etc; The latter includes the requirements of tension, bending and wear during winding and embedding, as well as swelling and erosion during impregnation and drying.
 

Magnet wires can be classified according to their basic composition, conductive core and electrical insulation layer. Generally, it is divided into enamelled wire, wrapped wire, enamelled wrapped wire and inorganic insulated wire according to the insulating material and manufacturing method used in the electrical insulating layer.
 

The purpose of electromagnetic wire can be divided into two types:
 

① General purpose, mainly used for motors, electrical appliances, instruments, transformers, etc. electromagnetic effect is generated by winding coils, and the purpose of converting electric energy and magnetic energy is realized by using the principle of electromagnetic induction;

② Special purpose: it is used in fields with special characteristics requirements such as electronic components and new energy vehicles. For example, micro electronic wire rod is mainly used for information transmission in electronic and information industries, and special wire rod for new energy vehicles is mainly used for the production and manufacturing of new energy vehicles.
 

Enameled aluminum wire
 

The conductor is coated with corresponding paint solution, and then made by solvent volatilization, paint film curing and cooling. Enamelled wire can be divided into polyester enamelled wire, polyester imide enamelled wire, polyamide imide enamelled wire, polyimide enamelled wire, polyester imide / polyamide imide enamelled wire, corona resistant enamelled wire, oily paint, acetal paint, polyurethane enamelled wire, etc. Sometimes it is also classified according to the particularity of its use, such as self-adhesive enamelled wire, refrigerant resistant enamelled wire, etc.

The earliest enamelled wire was oily enamelled wire, which was made of tung oil. Its paint film has poor wear resistance and can not be directly used to manufacture motor coils and windings. When using, it needs to add cotton yarn wrapping layer. Later, polyvinyl formal enamelled wire came out, and its mechanical properties were greatly improved. It can be directly used in motor windings, which is called high-strength enamelled wire.

 

With the development of weak current technology, self-adhesive enamelled wire has emerged, which can obtain a coil with good integrity without impregnation and baking. However, its mechanical strength is poor, and it can only be used in micro and special motors and small motors. In addition, in order to avoid the trouble of removing the paint film first during welding, the direct welding enamelled wire is developed, and its film can fall off by itself in the high-temperature tin lined tank, making the copper wire easy to weld.

Due to the increasingly wide application and strict requirements of enamelled wire, composite enamelled wire has also been developed. The inner and outer paint films are composed of different polymer materials, such as polyester imide / polyamide imide enamelled wire.
 

Aluminum winding wire
 

An important variety of aluminum winding wire. Cotton yarn and silk were used in the early stage, which were called yarn wrapped thread and silk wrapped thread. They were once used in motors and electrical appliances. Due to the large insulation thickness and low heat resistance, most of them have been replaced by enamelled wires. At present, it is only used as high-frequency winding wire. In large and medium-sized winding wires, when the heat resistance grade is high and the mechanical strength is large, glass wire wrapped wire is also used, and appropriate adhesive paint is matched during manufacturing.
 

Paper wrapped wire still occupies a considerable position in winding wire, which is mainly used in oil immersed transformer. The oil paper insulation formed at this time has excellent dielectric properties, low price and long service life. Paper wrapped wire is a wire annealed by oxygen free copper rod or electrical round aluminum rod after extrusion or drawing with a certain specification, and then winding wire wrapped with two or more layers of insulating paper (including telephone paper, cable paper, high-voltage cable paper, inter turn insulating paper, etc.) on copper (aluminum) conductor. It is suitable for oil immersed transformer coil and other similar electrical winding wires. Nomex Paper wrapped wire is a winding wire made of oxygen free copper rod or electrical round aluminum rod extruded by a certain specification of die, and then wrapped with Nomex insulating paper produced by DuPont. It is mainly used for the winding of transformer, electric welding machine, electromagnet or other similar electrical equipment products. The electrical bare copper (aluminum) conductor produced by extrusion process is the most ideal material for the production of cable
paper wrapped wire.
 

In recent years, film wrapping wire has developed rapidly, mainly including polyester film and polyimide film wrapping wire.

Recently, there are mica tape wrapped polyester imide film wrapped copper flat wire for wind power generation.
 

Insulated aluminum wire
 

When the heat-resistant grade requirements exceed the limits of organic materials, inorganic insulating paint is usually applied. The existing inorganic insulating wires can be further divided into glass film wires, oxide film wires and ceramic wires