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Rare-earth permanent magnet materials have been inserted or sticked to the rotor of motors in our PMSM products. Utilizing the particular design method of magnet circle and stator winding, the PMSM products have realized the sinusoidal of air gap magnetic field. Consequently the PMSM products can achieve perfect sine wave. The PMSM products possess the features of constant torque, need not excitated, rotate space rate is zero, power factor is close to one, etc. Therefore the PMSM products have been a new generation of electric motor of low energy, environmental protection, high efficiency that can be widely applied in many fields.
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