Basic Types of AC Electric Motors

An electric motor works on the principle of converting electrical energy into a mechanical force to do work. The type of electric motor you require at home would differ depending on the work that you need the motor to do. In general, there are certain classifications based on the kind of electrical energy (DC or AC) or the build of the motor according to which the motors are categorised. What will be discussed are the common types of AC motors.

AC Motors

The various types of AC Motors are:
Induction Motor: In an induction motor, the voltage is induced in the rotor by making the rotor rotate at a lower speed than the magnetic field.

Synchronous Motor: In this, the rotor is synchronised with the rotating magnetic field in the stator.

Synchronous Motors

Synchronous motors are so designed that the rotor maintains a constant speed that is synchronous to the speed of the rotating magnetic field. Some modifications like the addition of a squirrel cage windings are also added to make the motor self starting.

Reluctance Motors

A reluctance motor is a synchronous induction electric motor, where the rotor has poles and a cage winding so that self starts like an induction motor, but runs like a synchronous one. It uses a magnet rotor that is magnetized by the current in the stator coils. Since the motor has high permeability, it provides a significant increase in inductive power.

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