Winding wire is a type of conductive metal wire with an insulation layer, used to wind the coil or winding of electrical products. Its function is to generate a magnetic field through current, or to cut magnetic field lines to generate induced current, achieving the mutual conversion of electrical and magnetic energy. Therefore, it is also called electromagnetic wire. Classification: According to the material of the conductor, it can be divided into: copper, aluminum, alloy. According to the insulation material, it can be divided into: enameled wire, wrapped wire, Inorganic insulated wire can be divided into circular wire, flat wire, and irregular wire according to the shape of the conductor. Electromagnetic wire (winding wire) refers to the insulated wire used as a winding or component in motor appliances and electrical instruments. There are two types of conductive wire cores commonly used for electromagnetic wires: round wire and flat wire. Currently, copper wire is mostly used, and aluminum wire is rarely used. Due to the insulation material on the outside of the wire, the electromagnetic wire has different heat resistance levels. There are two types of commonly used electromagnetic wires: enameled wire and wrapped wire. (1) Enamelled wire. The insulation layer of enameled wire is a paint film, which is widely used in small and medium-sized motors, micro motors, dry transformers, and other electrical products. (2) Wrapping wire. The wrapping wire is tightly wrapped around the conductive wire core using glass wire, insulating paper, or synthetic resin film, forming an insulation layer; There are also cases where the insulation layer is wrapped around the enameled wire