Abstract: With the in⁃depth advancement of the global "dual⁃carbon" strategy, the new energy vehicle (NEV) industry has developed rapidly, and the demand for high⁃grade non⁃oriented silicon steel has also increased accordingly. The design, assembly, and complex operating conditions of NEVs require drive motors to possess characteristics such as high efficiency, high torque, small size, and a wide speed range. Based on the driving characteristics of NEVs, the core requirements of their drive motors for high⁃grade non⁃oriented silicon steel include high magnetic induction, low iron loss at high frequencies, and high strength. Additionally, other general requirements encompass excellent mechanical properties, good punching performance, a smooth and flat surface of the steel sheet with uniform thickness, excellent performance of the insulating film, and a weak magnetic aging phenomenon.

Key words: high?grade non?oriented silicon steel, magnetic properties, mechanical properties, surface condition, thickness