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How does a car alternator produce electricity?
I recently heard of something called a car alternator, and apparently it helps to power the car? I thought my car battery did that? What is a car alternator and how does it produce electricity?
Marlee John · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
With so many different car parts it can be difficult to keep track of which one does what but don’t worry—we’ve got you covered.
A car alternator is what keeps your vehicle on while the engine or the motor is running. While the 12-volt battery helps start your car, it actually isn’t responsible for powering the electronic components like headlights, windows, dashboard buttons while you drive—this is the alternator’s job.
In most modern vehicles, the process begins in the engine, where the crankshaft pulley drives a belt and in turn causes the alternator to spin. The alternator turns this mechanical energy (motion) into electricity. The magnets spinning around the alternator’s coil generate alternating current (AC) which is transformed into direct current (DC) and sent to each electric system.
Your car’s alternator is designed to last the car’s lifetime, however, heat damage, water exposure, wear and tear or faulty parts may cause it to stop working. If this happens make sure to get a professional’s assistance as the alternator is the key component in keeping your vehicle running!
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