What are the reasons for a gasoline generator not generating electricity?
2 Answers
There are several reasons for the failure of a car generator not generating electricity: The generator does not operate according to the specified technical conditions: For example, high stator voltage increases iron loss, excessive load current increases copper loss in the stator winding. Frequency too low: Causes the cooling fan speed to slow down, affecting the generator's heat dissipation, and a low power factor increases the rotor excitation current, leading to rotor heating. Check the monitoring instrument indicators: If abnormal, necessary adjustments and treatments should be performed to ensure the generator operates according to the required technical conditions. Main generator short circuit: Severe short circuits in the main generator or exciter windings, armature winding short circuits usually show obvious overheating, and exciter winding short circuits can be determined by their DC resistance value. Replace the damaged windings.
I've recently repaired gasoline generators that weren't producing electricity several times, and found the most common issues are worn brushes or faulty voltage regulators. The brushes are key components for conducting current - when they accumulate carbon dust or break after prolonged use, the magnetic field can't be established, causing power generation failure. The voltage regulator stabilizes output; once damaged, it may trigger overvoltage protection or show no response at all. Other causes include poor contact in excitation circuits or circuit breaker problems. Sometimes it's just air filter clogging or insufficient fuel supply causing unstable engine speed, which affects power generation. I recommend starting with brush inspection - check for looseness or dirt, then test the regulator's output voltage. These are simple DIY fixes but be careful to avoid electric shock. Regular cleaning and maintenance can prevent 90% of failures - don't wait until emergency generator use to scramble for repairs.
