Enameled Wire is also called winding wire. It is often divided into enameled wire, wound wire, enameled wound wire and random wire according to the material and manufacturing method of the electrical layer. The original enameled wire is an oily enameled wire made of tung oil, etc. It cannot be directly used to manufacture motor coils and windings. When in use, a cotton yarn wrapping layer should be added. Later, the polyvinyl formal enameled wire was invented. Its mechanical properties were greatly increased and it can be directly used in motor windings, which is called enameled wire.
With the development of weak current, self-adhesive enameled wires have appeared again, and coils with better integrity can be obtained without impregnation and baking. However, its mechanical strength is poor, and it can be used in micro and special motors and small motors. In addition, in order to avoid the trouble of paint film before welding, a direct-welding enameled wire has been developed, and its coating film can automatically fall off in a high-temperature tin lining tank, thus making the copper wire easy to weld. The application of enameled wire is becoming more and more extensive, and the requirements are becoming more and more strict.
Enameled wire can be divided into polyester enameled wire, polyester imide enameled wire, polyamide-imide enameled wire, polyimide enameled wire, polyamide-imide enameled wire, corona resistant enameled wire, oily paint, acetal paint, polyurethane enameled wire, etc. according to the paint used. Sometimes it is also classified according to its application, such as self-adhesive enameled wire, cryogen-resistant enameled wire, etc.