The principle, structure and wiring method of induction asynchronous motor are explained. Direct access to the internal stator, windings and cage rotor. The motor shaft end is equipped with fan blades, and the rotation of the motor can be seen. The stator winding has three coils, which are fixed with yellow, green and red tape respectively. An induction motor is an energy conversion device that realizes mechanical energy → electrical energy through electromagnetic coupling between stator winding and rotor winding.