The alternators work on the principle of electromagnetism to produce current. Here is how it works; If you take a strong magnet and pass it across a wire, that wire will generate a small voltage. Loop that same wire many more times, then if you pass the same magnet across the bundle of loops, a more sizable voltage is created =] in that wire.
There are two main components that sum up an alternator. These are the rotor and the stator. The rotor is wired directly to the alternator pulley. The drive belt turns the pulley, which in turn spins the rotor. The stator is placed on the body of the alternator and remains immovable. There is just enough room in the center of the stator for the rotor to fit and be able to spin without having any contact.
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