Basic Knowledge of Demagnetization in Diesel Generator Sets 1

Diesel generator sets are commonly used as backup power sources for modern residential buildings or as regular power sources for enterprise production. Their usage rate is already quite high. However, it is inevitable that various degrees of malfunctions may occur during the operation. Even though diesel generator sets come from different brands and the causes of malfunctions are diverse, generally speaking, the steps for maintenance and inspection are roughly the same. Therefore, it is very necessary for us to know more basic common sense about diesel generator sets. It will only bring us benefits without any harm. The following are some basic common sense about diesel generator sets collected by Guangxi Dingbo Power, a diesel generator manufacturer, for everyone. It briefly introduces the causes of malfunctions in diesel generator sets and the corresponding solutions, hoping to be of some help to everyone.

1.If the frequency and voltage of a diesel generator set are both unstable, does the problem lie in the diesel engine or the generator?

Answer: The problem lies in the diesel engine.

2.Why must the operating site of a diesel generator set have good air circulation?

Answer: The output of a diesel engine is directly affected by the quantity and quality of the air it inhales. As the heat generated by the generator set is discharged, the temperature inside the machine room will gradually rise. The generator set must have sufficient air for cooling. Therefore, the operating site must have good air circulation.

3.What is the situation of a generator losing its magnetism and how should it be dealt with?

Answer: When a generator is not used for a long time, the residual magnetism contained in the iron core before leaving the factory is lost, and the excitation coil cannot establish the necessary magnetic field. At this time, the engine runs normally but cannot generate electricity. This kind of phenomenon is more common in new machines or units that have not been used for a long time. The handling methods are as follows:

Press the excitation button if there is one.

If there is no excitation button, magnetize it with a battery.

Run at high speed for a few seconds with a light bulb load.

4.After a diesel generator set has been used for a period of time, it is found that the power has decreased, but the speed, frequency, and voltage are all normal. What are the main reasons?

Answer: 1) The ignition timing is incorrect and needs to be adjusted. 2) The fuel filter device is too dirty and the fuel injection amount is insufficient. It is necessary to replace or clean it. 3) The air filter is too dirty and the inhaled air is insufficient. At this time, it is necessary to clean or replace the air filter.

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