1. The enamelled wire must be dipped after being wound into a coil. The solvent in the dipping paint has a different degree of swelling effect on the paint film, especially at high temperatures.
2. The impregnated windings may be thermally cracked due to heat during use, so the impregnating paint and paint film must be compatible; the windings in use must have good chemical resistance in contact with the surrounding medium.
1. In the process of winding and forming the coil and entering the wire, friction occurs between the enamelled wire and the fixture and the wire and is subjected to stresses such as bending, tension, and compression. Therefore, the paint film is required to have good wear resistance, scratch resistance, and adhesion.
2. In order to facilitate processing, it requires good flexibility, elasticity, and bending performance so that it does not deform after bending. The high-speed winding machine requires a smooth surface and a small friction coefficient, and a high friction coefficient for special purposes. When the motor is running, it is subject to impact, vibration, centrifugal force and The stress generated during thermal expansion and overload requires a certain tensile strength.