The AC Induction Engine (ACIM), sometimes called a squirrel cage motor, is one of the most popular motors found in consumer and industrial applications. Induction machines are by considerably the largest group of all commercial electrical machines, converting approximately 70-80% of all electricity into mechanical form. The employ a robust rotor construction, making them ideal for high-speed applications. With proper design, they have great overloading and field weakening characteristics.

The ACIM is made up of a simple cage-like rotor and a stator containing three Ac Induction Motora china 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