The SMC iron core is a new type of soft magnetic material product produced after heat treatment with high purity iron powder as the main raw material, the powder particle surface is insulated, and the powder metallurgical technology is used to suppress the molding. It has low high-frequency Eddy current loss, high saturation magnetic induction, and can be processed into complex 3D structure products. SMC core has reduced motor volume, power consumption, wire saving, assembly simplification and so on.