1. It has a wide range of applications, operating with constant torque at 0-50hz; Constant power operation at 50-100hz.

　　2. Smooth speed adjustment, stepless speed adjustment in the range of 5-100hz 

　　3. Good speed stability.   

　　4. Low frequency starting torque has little impact on load.

　　5. Low starting current, without additional starting equipment.

　　6. Small operating slip, high efficiency and significant energy saving.

　　7. The air cover is equipped with an axial fan, which has good cooling effect at various rotating speeds.