The AC Induction Electric motor (ACIM), sometimes called a squirrel cage motor, is among the most popular motors used in consumer and industrial applications. Induction machines are by considerably the biggest group of all commercial electrical machines, converting around 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 good overloading and field weakening features.

The ACIM is comprised of a simple Ac Induction Motora china 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