What's AC induction motor
AC induction motor (IM) is a type of asynchronous AC motor. In the ac induction motor,the power is supplied to the rotating device by means of electromagnetic induction.
Another commonly used name for ac induction motor is squirrel cage motor because the rotor bars with short circuit rings resemble a squirrel cage (hamster wheel).
An electric motor converts electrical power to mechanical power in its rotor (rotating part). There are several ways to supply power to the rotor (rotating part). In a DC motor, the power is supplied to the armature directly from a DC source, while in an ac induction motor this power is induced in the rotating device. An ac induction motor is sometimes called a rotating transformer because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. Induction motors are widely used, especially polyphase induction motors, which are frequently used in industrial drives.
AC induction motors are now the preferred choice for industrial motors due to their rugged construction, absence of brushes (which are required in most DC motors) and thanks to modern power electronics, the ability to control the speed of the motor.
