AC motor is a machine used to realize the mutual conversion of mechanical energy and AC electrical energy. Due to the tremendous development of AC power systems, AC motors have become the most commonly used motors. Compared with DC motors, AC motors have no commutator, so the structure is simple, the manufacture is convenient, and they are relatively solid. It is easy to make motors with high speed, high voltage, large current, and large capacity. The coverage of AC motor power is very large, from a few watts to hundreds of thousands of kilowatts, or even millions of kilowatts. In the early 1980s, the largest steam generator had reached 1.5 million kilowatts. The AC motor was invented by the American Serbian scientist Nikola Tesla.
