It is a super efficient permanent magnet synchronous motor specially designed for the screw air compressor. The size and shape of the installation are the same as three-phase asynchronous motor. It adopts super high inherent force, high temperature resistant rare earth permanent magnet material, strong magnetic resistance, and can output constant torque almost in the whole speed range. Sinusoidal magnetic field design, low speed torque stability, overload capacity, safe and reliable use. The use of independent axial fan cooling, cooling effect is good. The unique design method of the lead wire can be customized according to the customer's requirements.