What is the Power Generation Principle of an Automotive Alternator?

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When the external circuit energizes the excitation winding through the brushes, a magnetic field is generated, magnetizing the claw poles into N and S poles. As the rotor rotates, the magnetic flux alternates within the stator windings. According to the principle of electromagnetic induction, an alternating electromotive force is induced in the three-phase windings of the stator. This is the power generation principle of an alternator. Below are relevant details: 1. Introduction: The automotive alternator serves as the primary power source of a vehicle. Its function is to supply power to all electrical devices (except the starter) and simultaneously charge the battery when the engine operates normally (above idle speed). 2. Classification: Automotive generators can be divided into DC generators and AC generators. Due to the superior performance of AC generators in many aspects, DC generators have been phased out.