Abstract: Non-oriented silicon steel serves as the primary material for fabricating all kinds of motor core, and the insulating coating on its surface has the functions of insulation, corrosion prevention and rust prevention, which helps to improve the energy efficiency of the motor. Through the regulation of coating composition, coating and drying technology, the finished product with excellent surface properties can be obtained. The research progress, types and properties of insulating coatings on the surface of non-oriented silicon steel were introduced, and the coating equipment and drying technology were discussed. Finally, it was pointed out that the development of environmentally friendly and special functional coatings will be the focus of future research.

Key words: non-oriented silicon steel, insulation coating, environment-friendly, coating equipment, drying technology