13 Difference between Alternator and Generator

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.

#	Content	Alternator	Generator
01	What 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 & generator	In an alternator, a rotating magnetic field is used.	In a generator, the stationary magnetic field is used.
03	Armature	The armature of an alternator is stationary in nature.	The armature of a generator is rotating in nature.
04	Input Source	In an alternator, the input source is taken from the stator.	In a generator, the input source is taken from the rotor.
05	Current generation	It produces or induces only alternating current (AC).	It produces the alternating current (AC) and direct current (DC).
06	Energy Conservation Capacity	This device stores a large amount of energy or electricity.	This device stores a small amount of energy or electricity.
07	Alternator & generator Output	It 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).
08	Alternator & generator RPM	Alternators have a wide range of RPM.	Generators have a low range of RPM.
09	Rings type	It uses solid rings.	It uses split rings.
10	Used	The alternator can not charge a dead battery.	The generator can charge a dead battery.
11	Brushes life	The 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.
13	Size of alternator & generator	It 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:

• Motor vs Generator
• Stator vs Rotor
• Active Power vs Reactive Power
• Electrical Circuit vs Magnetic Circuit
• Core Transformer vs Shell Transformer
• Synchronous Motor vs Induction Motor
• Single Phase vs Three Phase AC System
• Star Connection vs Delta Connection of AC System

Thanks for Reading!