Working of Alternator [Simple and Easy Illustration for Beginners]

An alternator or synchronous generator converts mechanical energy into electrical energy. This post explains the working principle of the alternator.

Basic principle

The rotor of the synchronous generator is an electromagnet. The application of dc current to rotor generates the magnetic field. A prime mover is connected to the rotor which rotates it to obtain a rotating magnetic field. This magnetic field interacts with stator windings and induces 3 phase voltage in the stator.

Components of Alternator

Like other electrical machines, an alternator comprises two parts:
  1. Rotor
  2. Stator

The stator is the rotating part of the machine. It consists of three coils which are placed at a phase difference of 120°. Whereas the rotor is the rotating part of the machine. It can either be a salient type or nonsalient type. The salient-type rotors are employed with two or four poles, whereas non-salient type is employed for four or more than four poles.

Let’s understand the working of the alternator.

Also learn: Difference between AC and DC Motors

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