The rotor of high efficiency industrial permanent magnet synchronous motor uses high performance rare earth permanent magnet material. The rotor permanent magnet material generates magnetic field, which interacts with the stator rotating magnetic field to produce driving torque. Motor work without reactive excitation current, high power factor, reduce the stator current and electronic resistance loss, and in stable operation without rotor copper consumption, and then can reduce the corresponding wind friction loss of the fan, so that its efficiency than the same specification induction motor increased by 5%-10%, so that the energy-saving effect of light load operation is more significant.