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SMC core is a high purity iron powder as the main raw material, the surface of the powder particles insulation treatment, the use of powder metallurgy by compression molding, heat treatment after preparation of a new class of soft magnetic materials products. It has a low-frequency eddy current losses, high saturation magnetic flux density, can be processed into complex 3D product structure, use SMC core, with the motor smaller in size, lower power consumption, saving wire, simplify assembly and