What Are the Reasons for a Car Generator Not Generating Electricity?
2 Answers
Car generator not generating electricity may be due to circuit or electronic faults. Below are specific details about car generators: 1. Working Principle: When an external circuit energizes the excitation winding through brushes, it generates a magnetic field and magnetizes the electrode into N and S poles. 2. Maintenance Methods: Regularly clean accumulated dirt and dust on the generator's surface to maintain cleanliness and good ventilation. Periodically check the tightness of all fasteners related to the generator and promptly tighten any loose screws. 3. Function: The car generator is the main power source of the vehicle. Its role is to supply power to all electrical equipment except the starter when the engine is running normally, while also charging the battery.
I've worked in auto repair shops for over a decade and have seen many cases of car alternators not generating electricity. Common causes include severely worn brushes - these components are responsible for conducting current, and when they're completely worn out, no electricity flows. If the voltage regulator fails, the entire charging system goes out of control, resulting in unstable output voltage. Belt looseness or breakage is more straightforward - the alternator simply stops rotating and can't generate power. Some hidden issues like bearing failure can cause the rotor to seize, or burnt diodes can interrupt current transmission. Loose or corroded wiring connections are also frequent culprits, especially in older vehicles. During inspection, first check the belt tension, then use a multimeter to measure if the output voltage falls within the normal 13-14 volt range. If not repaired promptly, the battery will completely drain, making roadside breakdowns very dangerous. That's why I always advise car owners to get professional system inspections at least every six months - prevention is better than cure.
