What are the common faults of a car generator?
2 Answers
Common faults of a car generator include: no charging, charging current too small, charging current too large, unstable charging current, and generator not generating electricity. Below is relevant information about the generator: 1. Function: The car generator is the main power source of the car. Its function is to supply power to all electrical equipment except the starter when the engine is running normally, while also charging the battery. 2. Composition: The car generator consists of a rotor, stator, rectifier, front and rear end covers, fan, and pulley components. 3. Working principle: When the external circuit energizes the excitation winding through the brushes, a magnetic field is generated, magnetizing the electrodes into N and S poles.
I've dealt with quite a few alternator failures while working at the repair shop, and there are several common issues. The most frequent problem is a faulty voltage regulator - when this component fails, the alternator stops generating electricity, and the battery warning light on the dashboard immediately comes on. Another issue is short circuits or broken copper wires in the rotor, which causes the alternator to stop working completely, often affecting the air conditioning system too. Worn-out carbon brushes are also troublesome; after some vehicles reach over 100,000 kilometers, the brushes may wear out completely, preventing electricity generation even when the engine is running. Loose or aged/broken belts are another culprit - they can't properly drive the alternator, often accompanied by squeaking noises. Bearing failures are also common, producing loud rattling sounds during operation, and prolonged use can damage the entire rotor. It's best to address these issues early rather than waiting until the battery is completely drained.
