The AC Induction Electric motor (ACIM), sometimes called a squirrel cage motor, is one of the most popular motors used in consumer and industrial applications. Induction devices are by far the largest group of all commercial electrical machines, converting approximately 70-80% of all electrical energy into mechanical type. The employ a robust rotor construction, making them ideal for high-speed applications. With proper design, they have good overloading and field weakening features.
The ACIM is comprised of a Ac Induction Motora china straightforward 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