What to do if the voltage of the car alternator is too high

When the voltage of the car alternator is too high, the following steps can be taken to deal with it:
Check and replace the voltage regulator: Malfunctioning the voltage regulator is a common cause of high alternator voltage. It is necessary to check if the regulator has lost control or if the voltage circuit is abnormal. If the regulator is damaged, a new voltage regulator needs to be replaced according to the alternator model.
Reduce speed: Reduce the opening of the turbine's guide vanes to lower the speed, thereby lowering the alternator voltage.
Adjusting the air gap: If the alternator voltage is too high due to the large air gap of the shunt reactor core, the air gap can be adjusted by changing the thickness of the reactor core gasket.
Repairing field varistors and motors: Short circuits in field varistors or motor runaways can cause high voltage. It is necessary to identify the short circuit point and repair the magnetic field variable resistor, or repair the motor to control its speed.
Replace damaged components: If the alternator voltage is too high due to damage to the iron core of the high-frequency transformer, failure of the cooling fan (possibly due to damage to the transistor), or damage to the fan itself, the corresponding components should be replaced.
It should be noted that when dealing with these issues, it is important to have a certain understanding of the working principles of automotive circuits and alternators, and to follow safety operating procedures.