Enameled wire refers to the metal wire used to wrap electromagnetic coil with insulating paint as insulation coating, also known as electromagnetic wire. It is a main type of winding wire, which is composed of conductor and insulation layer. After annealing and softening, the bare wire is painted and baked for many times. However, it is not easy to produce products that meet both standard requirements and customer requirements. It is affected by raw material quality, process parameters, production equipment, environment and other factors. Therefore, the quality characteristics of various enameled wires are different, but they all have mechanical, chemical, electrical and thermal properties.