Inspection Method
Conduct testing while running：
Connect the two probes of the voltmeter to the positive and negative terminals of the generator, and then use an electrical load, such as a light bulb or an electric heater, to output a certain amount of current from the generator. During this process, record the reading on the voltmeter and observe if the voltmeter reading is stable. If the value indicated by the voltmeter remains stable within the normal range, it indicates that the generator is operating normally. If the voltmeter shows abnormal or significant fluctuations, it indicates that there is a problem with the generator.
Conduct testing in a power-off state：
Testing in a power-off state is also a common method. Turn off all switches at the output of the generator, and then connect the two probes of the voltmeter to the positive and negative poles of the generator. At this point, the voltmeter should display a voltage of 0V. Start the generator using a hand cranked or electric starter. When the generator is working normally and reaches the rated speed, the indication on the voltmeter should gradually rise and stabilize within the normal range. If the voltmeter shows abnormal or significant fluctuations, it indicates that there is a problem with the generator.
Common problems and solutions
Generator output voltage is too high or too low：
If the output voltage of the generator is too high or too low, it may be due to internal faults in the generator, such as excitation circuit faults, rotor open circuits, or winding short circuits. At this point, it is necessary to disassemble the generator for maintenance or replace it.
Load imbalance：
If the generator is working properly, but the voltage of the equipment used in the circuit is unstable, it may be caused by an imbalance in charge distribution between the devices. At this point, it is necessary to balance the charge distribution in the circuit or add voltage stabilizing and filtering circuits to the circuit.
Poor maintenance and upkeep
If the generator works normally but malfunctions after prolonged use, it may be due to poor maintenance and upkeep. At this point, it is necessary to perform regular maintenance and upkeep on the generator, check whether the internal circuits and insulation materials of the generator are normal, clean and replace the filter screens and filters inside the generator, and replace the batteries inside the generator in a timely manner.