This is How the Function and Working of a Car Alternator

Most car owners are certainly aware that there are several engine components in their vehicles, each with its own specific function. 

For example, a component called alternator generally helps four-wheeled vehicles to start.

So, what is the actual function of the alternator in a car? Let's take a look at the following review.

Function of the Alternator 

As previously discussed, the alternator generally helps four-wheeled vehicles to be started. This is because the alternator is an electromechanical device that serves to convert mechanical energy into alternating electrical energy. 

Many refer to the alternator component as a dynamo ampere. The generation of electrical current by the alternator is capable of meeting the needs to drive several additional engine components in the car. 

Not only that, the alternator is also usually used to meet electrical needs at idle speeds. This dynamo ampere will supply electricity to all electrical parts of the car while the engine is running.

In performing its function, the alternator is assisted by several supporting components, including stator, bracket, rectifier (diode), brushes, and rotor. 

The function of the alternator in a car operates without requiring a cut out relay that serves to prevent the flow of electricity from the battery to the dynamo.

Read also: Causes of Unstable Car Electrical System

How the Alternator Works

The way the alternator works is by generating electrical current from the stator coil which is then regulated by the IC regulator to ensure that the produced voltage does not exceed the limit. 

In addition, the generated electrical voltage can also be used to charge the electricity in the car battery and can be utilized by several other engine components. 

First, the field coil or rotor coil will receive electrical current from the battery. The received electrical current creates a magnetic field in the rotor coil. 

When the alternator is rotated by the engine, the magnetic field will cut through the conductor windings in the stator coil. This process is what causes the emergence of electrical current in the stator coil.

With the function of the alternator in the car, it will convert the alternating voltage coming from the stator coil into direct current through the diode. 

The generated current will flow into the IC regulator to keep the produced voltage stable, which is around 14.2 volts, and capable of charging the car battery. 

Next, the voltage stabilization process performed by the component called IC regulator is done by utilizing a zener diode. The zener diode acts as a switch for the voltage of the IC regulator. 

When the zener diode is in the ON position, the electrical current flowing to the field coil will be interrupted.

This will result in the absence of a magnetic field being created, causing the stator to stop generating electrical current. The cessation of electrical current from the stator coil will reduce the voltage to the zener diode accordingly. 

The performance of the alternator function in this car will cause the zener diode to turn OFF and the electrical current to the field coil will flow again. Thanks to the presence of the alternator in the four-wheeled vehicle components, it can be started and operated as it should. 

Even the presence of the dynamo ampere allows several other electrical components to be powered, such as lights. The importance of the alternator's role demands that the owner must regularly check its condition.

Read also : 8 Signs of a Problematic Car Alternator