The function of the alternator is to convert mechanical energy into electricity used by the vehicle. Thus, the alternator supplies the vehicle with electrical energy and makes this electricity available for basic functions such as starting and equipment of the car, including the battery. When the vehicle is turned off, the alternator has no function and the battery is responsible for the energy supply.
How does the alternator work?
Alternator is an electromechanical device. This is done via a belt as it is an integral component of the engine and not part of it. It can therefore be removed for maintenance or replaced in the event of a malfunction.
This component consists of a shaft with bearings with permanent magnets, which in contact with the coils create a magnetic field at the ends of the coils that converts motion into electricity by means of an electrical voltage.
This electrical energy produced is called alternating current, and its polarity is constantly changing, preventing stable use by the vehicle’s electrical system. The voltage regulator adjusts the voltage coming from the alternator.
A common electrical system has a voltage of 12 volts, which is the lead acid battery voltage used in normal cars. This does not prevent the batteries from using the same voltage. Chargers, lighters, etc. All electrical components of the vehicle, including the “12V” source to which it is connected, also use this voltage.