An electrical generator in vehicles that converts mechanical energy from the engine into alternating current to charge the battery and power electrical systems.
From Latin 'alternatus' meaning 'done by turns,' from 'alter' (other, another). The electrical term emerged in the early 20th century as automotive technology developed, distinguishing it from direct current generators.
The alternator is one of those unsung heroes of modern life - without it, your car would literally die within minutes of starting. Unlike the older DC generators, alternators are more efficient because AC current is easier to generate and can be converted to DC as needed.
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