Alternator vs Generator

Alternator and generator are two devises, which generates electricity. An alternator can be called as a sort of generator. Though these two devises have the same function, they are quite different in every aspect.

An alternator is a charging system of the car that produces electricity. Generators are used in large-scale electricity production. Both the Alternator and the generator convert mechanical energy into electrical energy. The main difference between a generator and an alternator is with regard to what spins and what is fixed.

In an alternator, electricity is produced when a magnetic field spins inside the stator (windings of wire). On the other hand in generator, the armature or the windings of wire spin inside a fixed magnetic field to generate electricity.

Alternators are considered to be more profitable than the generators. The alternators save energy by using only the energy that is needed. But the generators use all the energy that is supplied. It has also been seen that alternators produce higher output than generators.

Coming to polarization, the alternators and generators are different. While Generators have to be polarized after installation, there is no need for polarization in alternators.

The alternator brushes last longer than the generators. This is because the brushes in an alternator are used only for carrying current to power the rotor and the slip rings that they ride are smooth.

Another difference that can be noted between a generator and an alternator is with regard to charging. An alternator will not charge a dead battery and if you try to charge it, there is a possibility that it will burn. But a generator can be used for charging a dead battery.

Coming to the size, alternators can fit into a small space. The generators are a bit large.

Summary
1.In an alternator, electricity is produced when a magnetic field spins inside the stator (windings of wire). On the other hand, the amateur or the windings of wire spin inside a fixed magnetic field to generate electricity.
2.The alternators save energy by using only the energy that is needed. But the generators use all the energy that is supplied.
3.Alternators give out voltages when needed and generators give out voltage at all times.
4.Alternators produce higher output than generators.