What are the reasons for a vehicle generator not generating electricity?
2 Answers
The reasons for a vehicle generator not generating electricity are: 1. Diode breakdown causing loss of rectification function; 2. Brushes stuck in the brush holder; 3. No current in the rotor's field winding; 4. Short circuit or grounding between stator windings; 5. Loose rotor claw poles. The car generator is the main power source of the vehicle, whose function is to supply power to all electrical equipment (except the starter) when the engine is running normally (above idle speed), while simultaneously charging the battery. The generator of a car is usually composed of components such as the stator, rotor, end cover, and bearings, among which the stator is used to generate alternating current. When using the generator for power generation, it is necessary to first determine whether the contact is good and check if the power wires are correctly connected.
Last time my car broke down halfway was because the alternator wasn't generating electricity. Only after being towed to the repair shop did I find out the problem. The main reason was a faulty voltage regulator in the alternator - this component controls voltage output, and when it fails, the alternator stops working completely. Another possibility is a loose belt slipping, causing the alternator to stop spinning. Excessive wear on the alternator's carbon brushes can also cut power - my friend's car had brushes worn down to exposed copper wires, causing a direct short. Poor electrical connections are common too, like corroded battery terminals from rainwater. The worst case is aging internal coils - mechanics say it's better to replace than repair in such cases. If you see the battery warning light on your dashboard, pull over and check immediately.
