Why does the electricity generated by the car's generator pass through a regulator?

The electricity generated by the car does not go through the regulator, but the electricity from the excitation circuit goes through the regulator to adjust the size of the excitation circuit of the generator so that the maximum voltage of the generator can be maintained between 13.6 and --14.6 V. Question: If you want to replace the generator with an internal regulator with an external regulator, how to change it? How to connect the wires? Answer: First, do you need to change the internal regulator? an external regulator. It must be that your built-in regulator is broken. If you cannot find a regulator with suitable size, voltage and other parameters, consider switching to an external regulator. 1: First take out the two wires from the excitation carbon brush. Disconnect the power (+) and output (i.e. the two wires connected to the carbon brush) of the original integrated regulator to avoid conflict with the later modified external regulatorlaughingly. 2: Find a suitable external regulator and attach it in a suitable location. (Do not install it near a place that is too hot. It is better if the wind passes through it, with good heat dissipation and relatively durable.) 3: Find out whether the modified external regulator is positive or negative. (Whether it is adjusting positive power generation or negative power generation). Generally speaking, most external regulators adjust the positive output. 4: Connect one of the two wires of the excitation carbon brush just pulled to negative (i.e. ground) and the other to F of the external regulator. If it is a negative regulator, the reverse is true, i.e. one wire is connected to the positive and the other wire is connected to the F of the regulator. 5: The "-" on the regulator is connected to negative electricity and the "+" is connected to the ignition switch (i.e. the wire that receives power whenthe key is on). The key is off, the engine will have no excitation and the generator will not be energized and still energized after the engine is turned off, this will burn out the excitation coil and regulator and cause loss of battery power) . 6: Start the engine and check. 7: Give me extra points when you're done!