The AC Induction Electric motor (ACIM), sometimes called a squirrel cage motor, is one of the most popular motors used in consumer and commercial applications. Induction devices 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 suitable for high-speed applications. With correct design, they have great overloading and field weakening characteristics.
The ACIM is made up of a Ac Induction Motora china 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 does not have any moving contacts, which eliminates sparking