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 devices are by far the biggest group of all industrial electrical machines, converting around 70-80% of all electricity into mechanical form. The employ a robust rotor construction, which makes them suitable for high-speed applications. With appropriate 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 made 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 Ac Induction Motor moving contacts, which eliminates sparking