1. S - car battery voltage input terminal, used by the generator to detect the battery voltage. The generator adjusts the output state according to the detected S terminal voltage to prevent battery overcharging and improve battery life.
2. IG - The power cord from the IG (ON position) of the ignition switch provides excitation current to the generator rotor and power to the voltage regulator.
3. L——Charging indicator terminal, only connected to the indicator light, no output function, no excitation function.
Detailed information
It is divided into five categories according to the overall structure:
1. Ordinary alternator is also called "silicon rectifier power generation" "Generator" (a generator with a voltage regulator is required for use). Example JF132 (for EQ140). ?
2. Integrated alternator (generatorator and regulator are transformed into an integrated generator. For example, the Buick car engine is equipped with a CS type alternator (including CS-121, CS-130 and). CS-144 three different models).
3. Alternator with pump. (The pump installed in the pumped alternator is a vacuum pump, not a vacuum booster pump. The vacuum booster pump is on the car's brake system).
4. Brushless alternator (generator that does not require brushes) example JFW1913.
5. Permanent magnet alternator. Magnetic pole generators made of permanent magnets).
Baidu Encyclopedia - Car Generator