What Causes Low Power Generation in a Car?
2 Answers
No-load voltage being too high or too low, generator overload causing load current and voltage to exceed rated values, or too low load power factor can all have an impact. Please see below for detailed explanations: 1. No-load voltage too high: Automatic voltage regulator malfunction. No-load exciter field winding current too large. 2. No-load voltage too low: Exciter field winding open circuit. Main generator field winding severely short-circuited. Exciter field winding current too high. 3. Overheating: Generator overload causing load current and voltage to exceed rated values; load power factor too low; rotational speed too low; partial short-circuit in generator windings; ventilation duct blockage. 4. Excessive vibration: Poor alignment with prime mover. Poor rotor dynamic balance, occurring after rotor rewinding.
There are usually several main reasons for low car power generation. The generator itself may be faulty, such as worn internal parts or coil issues, which reduce the output power over time due to aging. The belt tension could be too loose, causing slippage and preventing the generator from functioning properly. A faulty voltage regulator, unable to control the voltage, leading to unstable voltage levels, can also affect power generation. Rusty or poor connections in the wiring can hinder current flow. Additionally, having too many electrical devices running simultaneously, like the air conditioner and audio system, can overload the generator, causing insufficient supply and low output. I find this situation quite troublesome. While driving, it's important to keep an eye on the voltage indicator on the dashboard. If the warning light comes on, stop and check immediately to avoid prolonged issues, as a dead battery leading to sudden engine shutdown on the highway is very dangerous. Regular maintenance is crucial—have a technician inspect the generator and belt to prevent problems before they occur.
