What is the main structure of the fan coupler?

The fan coupler is mainly composed of copper rotor, permanent magnet rotor and controller. In general, the copper rotor is connected to the motor shaft, the permanent magnet rotor is connected to the shaft of the working machine, and there is an air gap (called an air gap) between the copper rotor and the permanent magnet rotor, and there is no mechanical connection to transmit torque. In this way, a soft (magnetic) connection is formed between the motor and the working machine, and the torque and speed of the working machine shaft are changed by adjusting the air gap.