Operation Principle of Automobile Generator
2025-06-27
The working principle of automobile AC generator is based on electromagnetic induction. When the engine is running, the AC generator rotor rotates through the belt. When the excitation winding on the rotor is energized, a magnetic field is generated, which magnetizes the salient poles into N poles and S poles. When the rotor rotates, its magnetic field cuts the stator winding, generating an alternating induced electromotive force in the stator winding, thereby outputting AC power. Then, the rectifier inside the AC generator converts the AC power into DC power to power the car's electrical system and battery.
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