Permanent magnet brushless servo motor

A permanent magnet brushless servo motor comprises a rotor. The rotor is a hollow rotor. A rotor iron core, a permanent magnet material, a front end plate, a rear end plate, and a hollow shaft are included. The hollow shaft is successively provided with an external spline shaft extension, a front bearing gear, several air outlet holes, an iron core gear, a positioning keyway, an axial retaining ring, several air inlet holes, and a rear bearing gear position from a driving end. The air inlet holes and the air outlet holes on the hollow shaft, a cavity of the hollow shaft, and an air gap betweena stator and a rotor of the motor are connected. The front bearing gear is provided with a front bearing, a rotor iron core gear is provided with the rotor iron core, and a front end plate and a rearend plate of positioning are arranged at two ends of the rotor iron core. An induction permanent magnet on the rotor is arranged on an epoxy sleeve. A rear bearing is installed at the rear bearing gear position and the rear b