What is the working principle of the induction AC motor?

AC motors are used quite extensively, so what is an induction AC motor?

The AC motor consists of a stator and a rotor. In the model, the stator is the electromagnet and the rotor is the coil. The stator and the rotor are powered by the same power source. Therefore, the direction change of the current in the stator and the rotor is always synchronized, that is, the direction of the current in the coil changes, and the direction of the current in the electromagnet also changes. According to the left hand rule, the coil The direction of the magnetic force is unchanged, and the coil can continue to turn.

About the role of two copper rings: two copper rings with two corresponding brushes, the current is continuously sent to the coil. The advantage of this design is that it avoids the problem of the winding of the two power lines, because the coil is constantly turning, and if two wires are used to supply power to the coil, the two power cables will be wound.

Since the current in the coil is alternating current, there is a moment when the current is equal to zero, but this time is too short compared with the time of the current, not to mention the quality of the coil, with inertia, because the inertia coil will not stop.

The AC motor generates a rotating magnetic field in the stator winding according to the characteristics of the alternating current, and then causes the rotor coil to cut the magnetic induction line, so that the rotor coil generates an induced current, and the induced magnetic field generated by the induced current is opposite to the direction of the magnetic field of the stator. The rotor has a rotational moment.