The AC Induction Electric motor (ACIM), sometimes called a squirrel cage motor, is among the most popular motors used in consumer and industrial Ac Induction Motora china applications. Induction machines are by far the biggest group of all commercial electrical machines, converting approximately 70-80% of all electricity into mechanical type. The have a very robust rotor construction, making them ideal for high-speed applications. With correct design, they have good overloading and field weakening characteristics.
The ACIM is made up of a simple cage-like rotor and a stator containing 
three windings
The changing field produced by the AC line current in the stator induces a current in the rotor which interacts with the field and causes the rotor to rotate
The rotor doesn’t have any moving contacts, which eliminates sparking