A three-phase asynchronous motor is a type of induction motor. It is a kind of motor that is powered by simultaneously connecting 380V three-phase alternating current (with a phase difference of 120 degrees). Since the rotor of a three-phase asynchronous motor rotates in the same direction but at a different speed as the rotating magnetic field of the stator, There is a slip rate, so it is called a three-phase asynchronous motor. The rotational speed of the rotor in a three-phase asynchronous motor is lower than that of the rotating magnetic field. Due to the relative motion between the rotor winding and the magnetic field, an electromotive force and current are generated, which interact with the magnetic field to produce an electromagnetic torque, achieving energy conversion.