The AC Induction Motor (ACIM), sometimes called a squirrel cage motor, is one of the most popular motors used in consumer and commercial applications. Induction machines are by far the largest group of all commercial electrical machines, converting approximately 70-80% of all electricity into mechanical form. The employ a robust rotor construction, which makes them suitable for high-speed applications. With proper design, they have good overloading and field weakening features.
The ACIM is 
made up of a straightforward cage-like rotor and a stator Ac Induction Motora china containing three windings
The changing field made 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