The main element of the basic type permanent magnet coupler is a conductor rotor and a surrounding permanent magnet rotor. The conductor rotor is a steel rotor with a copper ring, which is connected to the motor shaft. The permanent magnet rotor is an aluminum rotor with permanent magnet materials. Connected to the shaft of the working machine, the permanent magnet rotor and the conductor rotor form a fixed gap and never contact. When the motor rotates, the relative movement between the rotors can induce eddy currents in the conductors, and the magnetic fields generated by the eddy currents interact with the permanent magnet magnetic fields to realize torque transmission.