Learn what an alternator is, how it works, and what types and applications it has. An alternator is a device that converts mechanical energy into AC electricity using electromagnetic induction. Learn about the alternator , an electrical generator that converts mechanical energy to electrical energy in cars and other vehicles. Find out the types, working principle, parts, uses, components and symptoms of a bad alternator . Learn about the alternator , a type of AC generator that converts mechanical energy into electrical energy. Find out its components, working principle, types, advantages, disadvantages and applications in various fields. Learn about the components and functions of a vehicle alternator , a device that converts mechanical energy into AC electrical energy. Find out how the rotor, stator, rectifier, diode trio and voltage regulator work together to produce DC voltage for the battery and electrical systems.