What Causes a Car Generator to Fail?

[DeIsabella]

Car generator failure is caused by vehicle wear. Below is relevant information about car engines: Principle: When the car engine speed increases, the generator's output voltage also rises. At this point, the regulator reduces the excitation current to maintain the output voltage at around 14V, not exceeding 14.5V. This ensures the battery is not overcharged and maintains a constant vehicle voltage. Therefore, even when the car is idling, the generator can still deliver over 60% of its power. Function: The generator's pulley diameter is much smaller than the crankshaft pulley diameter, causing the generator to rotate at a much higher speed than the engine under belt drive. Thus, the generator is capable of charging the battery even at idle speed.