[Generator charging current unstable fault phenomenon](1) When the engine is running above idle speed, the ammeter pointer has been swinging. (2) When the engine is running above idle speed, the charging indicator flashes. (3) When the car is driving at night, the headlights flash. [Reasons for generator charging current instability](1...

An alternator is a rotary power generator that converts mechanical energy into electrical energy, using a rotating magnetic field induction coil to create a potential difference that generates an electric current. It is widely used in various fields, including power plants, industrial manufacturing and household electricity.

Alternator is an integral part of engine power system. The alternator continuously charges the battery while the engine is running, ensuring that no power is lost. The alternator can also regulate the power back to the battery so as not to overcharge. Under normal circumstances, we will encounter alternator failure and other conditions, this article introduces what is the alternator at the same time, provide several methods for detecting whether the alternator is faulty