13 Difference between Alternator and Generator

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In this post, we are going to study alternator vs generator. Also, we will see multiple specifications like definition, construction, internal parts, working role, function, use, speed, size, and many more.

Let’s start wiht the basic introduction.

The alternator and generator are electromagnetic devices that help to generate electricity. Both are working based on the same principle of Faraday’s law of electromagnetic induction. 

What is a Alternator?

The device which converts mechanical energy into electrical energy in the form of alternating current (AC) is called as an Alternator.

Sometimes, alternator is called as AC generator or Synchronous generator.

What is a Generator?

The device which converts mechanical energy into electrical energy in the form of alternating current (AC) or direct current (DC) is called as a Generator.

Read more: Alternating current (AC) vs Direct current (DC)

What is the difference between Alternator and Generator.

Let’s compare an alternator vs generator in tubular form.

#ContentAlternator Generator
01What is the main function of an alternator & generator?The main function of an alternator is to generate AC by converting mechanical energy to electrical energy. The main function of a generator is to generate AC or DC by converting mechanical energy to electrical energy.
02[Internal Parts] Mangtic field of alternator & generatorIn an alternator, a rotating magnetic field is used.In a generator, the stationary magnetic field is used.
03Armature The armature of an alternator is stationary in nature.The armature of a generator is rotating in nature.
04Input SourceIn an alternator, the input source is taken from the stator.In a generator, the input source is taken from the rotor.
05Current generationIt produces or induces only alternating current (AC).It produces the alternating current (AC) and direct current (DC).
06Energy Conservation CapacityThis device stores a large amount of energy or electricity.This device stores a small amount of energy or electricity.
07Alternator & generator OutputIt gives output in the form of alternating quantities (voltage or current). It gives output in the form of alternating as well as constant quantities (voltage or current).
08Alternator & generator RPM Alternators have a wide range of RPM.Generators have a low range of RPM.
09Rings typeIt uses solid rings.It uses split rings.
10UsedThe alternator can not charge a dead battery.The generator can charge a dead battery.
11Brushes lifeThe brushes of the alternator have a short life.The brushes of the alternator have a long life compared to the alternator.
12
difference between 
alternator and dc generator
(Transformer)
An alternator needs an electrical transformer.The DC generator does not require an electrical transformer.
13Size of alternator & generatorIt occurs small in size as compared to the generator. It occurs largely in size as compared to the alternator.

These 13 points are covered the major difference between the alternator and the generator. And these differences help to describe the advantages of alternator vs generator.

If you have any queries regarding alternator vs generator, you can ask in the comment section.

Other related some differences:

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