The AC Induction Electric motor (ACIM), sometimes called a Ac Induction Motor squirrel cage motor, is 
among the most popular motors used in consumer and commercial applications. Induction devices are by much the biggest group of all industrial electrical machines, converting approximately 70-80% of all electrical energy into mechanical type. The have a very 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 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
