A Review of Development and Performance Control of Non-oriented Silicon Steel for Drive Motors

Realizing “carbon peak” and “carbon neutrality” is an inherent requirement for implementing the new development concept, constructing a new development pattern, and promoting high-quality development. Under the strategic background of implementing “dual carbon” target and promoting green development, China’s new energy vehicle industry has developed rapidly. As the core device for energy conversion in new energy vehicles, the drive motor directly determines the driving experience and endurance performance of new energy vehicles. Non-oriented electrical steel, as the key soft magnetic material of the driving motor core, directly affects the energy conversion efficiency, variable frequency acceleration capability, service life, manufacturing cost and other characteristics of the drive motor. Based on the practical demand for high-performance non-oriented silicon steel in drive motors, the research and development status of silicon steel for new energy vehicle drive motors in typical silicon steel production enterprises at home and abroad.The research progress of silicon steel for drive motors in improving magnetic and mechanical properties, as well as the synergistic improvement of magnetic and mechanical properties was reviewed. In view of the characteristics of high efficiency, high speed and high torque of the new generation of drive motors, the research and development of high-performance non-oriented silicon steel for drive motors in the future will be based on composition optimization design, microstructure control and thin-gauge product development. While further improving the accuracy and production efficiency of silicon steel products, it will break through the limitations of self-adhesive coatings and integrate multi-disciplinary knowledge such as metallurgy, material science and physics, which can better realize the coordinated control of high-performance non-oriented silicon steel development and drive motor design.