Enameled wire is a category of electromagnetic wire, usually refers to the insulated wire used to manufacture coils or windings in electrical products. Also called winding wire.
The magnet wire must meet the requirements of a variety of uses and manufacturing processes. The former includes its shape, specifications, ability to work at high temperatures for short and long periods of time, as well as withstanding strong vibration and centrifugal force at high speeds in some occasions, resistance to corona and breakdown under high voltage, and resistance to chemicals in special atmospheres Corrosion, etc.; the latter includes the requirements of stretching, bending and abrasion during winding and embedding, as well as swelling and erosion during dipping and drying.
Magnet wire can be classified according to its basic composition, conductive core and electrical insulation layer. Generally, it is divided into enameled wire, wound wire, enameled wire and inorganic insulated wire according to the insulating material and manufacturing method used in the electrical insulating layer.
Enameled wire is coated with a corresponding lacquer solution on the outside of the conductor, and then made by solvent volatilization and solidification of the paint film and cooling. Enameled wire can be divided into polyester enameled wire, polyesterimide enameled wire, polyamideimide enameled wire, polyimide enameled wire, polyesterimide/polyamideimide enameled wire, corona resistant enameled wire, and oily enameled wire according to the insulating varnish used. Paint, acetal paint, polyurethane enameled wire, etc. Sometimes it is also classified according to the particularity of its use, such as self-adhesive enameled wire, refrigerant-resistant enameled wire, etc.
Early enameled wire was oily enameled wire, made of tung oil. The paint film has poor abrasion resistance and cannot be directly used to make motor coils and windings. It needs to be covered with cotton yarn when used. Later, polyvinyl formal enameled wire came out, and its mechanical properties were greatly improved. It can be directly used in motor windings and is called high-strength enameled wire.
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