Diesel Engine Alternator S4Q2 E303 Excavator A7T02077 12V 50A

An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. For reasons of cost and simplicity, most alternators use a rotating magnetic field with a stationary armature.

What is an Alternator and How Does it Work? 

You may think your car battery is powering all things electrical in your car, be it your windshield wipers, headlights or radio. In reality, it’s the car alternator that produces the majority of your vehicle’s electricity — your battery is mainly just used to start your vehicle and provide power when the engine isn’t running. The alternator is a critical component of a car’s charging system, so it’s helpful to understand how it operates in case you have to deal with your car not starting.

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