Specification
Aluminum electromagnetic wire
Source：Original
Editing：frank
Time：2019-07-22 17:57
Aluminum core electromagnetic wire, as its name implies, refers to the electromagnetic wire with aluminium as its core. Magnet Wire is used to manufacture insulated wires with coils or windings in electrical products. Also known as winding wire.Aluminum electromagnetic wires must meet the requirements of various applications and manufacturing processes. The former includes its shape, specification, short-term and long-term operation at 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 circumstances, etc. The latter includes the requirements of tension, bending and wear when winding and inserting wires, and Swelling and erosion during impregnation and drying.
Aluminum core electromagnetic wire can be classified according to its basic composition, conductive wire core and electrical insulation layer. Generally, according to the insulation materials and manufacturing methods used in the electrical insulation layer, there are aluminium core enameled wire, aluminium core enameled wire and inorganic insulating wire. Enamelled wire of aluminium core electromagnetic wire: It is made by coating the conductor with corresponding paint solution, then volatilizing the solvent, solidifying and cooling the paint film. Enameled wires can be divided into polyester enamelled wires (PEW), polyesterimide enameled wires (EIW), polyamide enameled wires (AIW), polyimide enameled wires, polyesterimide/polyamide enameled wires (AIW), corona resistant enameled wires, paint, acetal paint, polyurethane enameled wires and so on. Sometimes it is also classified according to the particularity of its use, such as self-adhesive enameled wire, refrigerant-resistant enameled wire, etc.
The earliest enameled wires for electromagnetic wires were oil enameled wires, made of Tung oil, etc. The paint film has poor wear resistance and can not be directly used to manufacture motor coils and windings. Cotton yarn wrapping layer is needed in use. Later, the polyvinyl formaldehyde enameled wire came out, and its mechanical properties were greatly improved. It can be directly used in motor windings, which is called high strength enameled wire.
With the development of weak current technology, self-adhesive enameled wires have emerged, which can obtain better coils without impregnation and baking. But its mechanical strength is poor, so 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, a direct weldable enameled wire was developed. The coating film can fall off in the high temperature enamel tank and make the copper wire easy to weld.
The winding of aluminum electromagnetic wire: an important variety of winding wire. Early cotton yarn and silk, called yarn wrapped yarn and silk wrapped yarn, were used in motor and electrical appliances. Because of its large insulation thickness and low heat resistance, most of them have been replaced by enameled wires. At present, it is only used as high frequency winding wire. In large and medium size winding wires, when the heat resistance level is high and the mechanical strength is high, the glass filament wrapped wire is also used, and the appropriate adhesive paint is used in the manufacture.
Paper wrapped wire still occupies a considerable position in wrapped wire, mainly used in oil-immersed transformer. The oil-paper insulation formed at this time has excellent dielectric properties, low price and long service life. In recent years, film wrapping wires have developed rapidly, mainly polyester film wrapping wires and polyimide film wrapping wires. Recently, mica tape coated polyesterimide film has been used to wrap copper flat wires for wind power generation.
Aluminum core electromagnetic wire can be classified according to its basic composition, conductive wire core and electrical insulation layer. Generally, according to the insulation materials and manufacturing methods used in the electrical insulation layer, there are aluminium core enameled wire, aluminium core enameled wire and inorganic insulating wire. Enamelled wire of aluminium core electromagnetic wire: It is made by coating the conductor with corresponding paint solution, then volatilizing the solvent, solidifying and cooling the paint film. Enameled wires can be divided into polyester enamelled wires (PEW), polyesterimide enameled wires (EIW), polyamide enameled wires (AIW), polyimide enameled wires, polyesterimide/polyamide enameled wires (AIW), corona resistant enameled wires, paint, acetal paint, polyurethane enameled wires and so on. Sometimes it is also classified according to the particularity of its use, such as self-adhesive enameled wire, refrigerant-resistant enameled wire, etc.
The earliest enameled wires for electromagnetic wires were oil enameled wires, made of Tung oil, etc. The paint film has poor wear resistance and can not be directly used to manufacture motor coils and windings. Cotton yarn wrapping layer is needed in use. Later, the polyvinyl formaldehyde enameled wire came out, and its mechanical properties were greatly improved. It can be directly used in motor windings, which is called high strength enameled wire.
With the development of weak current technology, self-adhesive enameled wires have emerged, which can obtain better coils without impregnation and baking. But its mechanical strength is poor, so 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, a direct weldable enameled wire was developed. The coating film can fall off in the high temperature enamel tank and make the copper wire easy to weld.
The winding of aluminum electromagnetic wire: an important variety of winding wire. Early cotton yarn and silk, called yarn wrapped yarn and silk wrapped yarn, were used in motor and electrical appliances. Because of its large insulation thickness and low heat resistance, most of them have been replaced by enameled wires. At present, it is only used as high frequency winding wire. In large and medium size winding wires, when the heat resistance level is high and the mechanical strength is high, the glass filament wrapped wire is also used, and the appropriate adhesive paint is used in the manufacture.
Paper wrapped wire still occupies a considerable position in wrapped wire, mainly used in oil-immersed transformer. The oil-paper insulation formed at this time has excellent dielectric properties, low price and long service life. In recent years, film wrapping wires have developed rapidly, mainly polyester film wrapping wires and polyimide film wrapping wires. Recently, mica tape coated polyesterimide film has been used to wrap copper flat wires for wind power generation.
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