The function of the coated magnetic pole coil is to change a magnetic field without rotation into a magnetic field moving continuously from the uncoated part to the coated part on the surface of the magnetic pole, so as to realize the rotation property.
The rotor starts itself from the uncovered part to the covered part to realize normal operation, that is, the steering can only be in one direction and cannot be reversed.
"Asynchronous motor", that is, the rotor is placed in a rotating magnetic field, and under the action of the rotating magnetic field, a rotating torque is obtained, so the rotor rotates. The rotor is a rotatable conductor, usually in the form of a squirrel cage. Stator is the non-rotating part of motor, and its main task is to generate rotating magnetic field. The rotating magnetic field is not realized by mechanical means. Instead, alternating current is applied to several pairs of electromagnets to make their magnetic pole properties change cyclically, so it is equivalent to a rotating magnetic field. This kind of motor doesn't have brushes or slip rings like DC motors. According to the type of AC power used, there are single-phase motors and three-phase motors. Single-phase motors are used in washing machines, electric fans, etc. Three-phase motor is the power equipment of the factory.