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Handling common problems of synchronous generators

发表时间:2017-08-18 Article source : Couch motor manufacturersPublished time: 2017-08-18

Handling common problems of synchronous generators

The diesel engine is working normally, but the generator fails to generate electricity or the voltage is very low. This may be due to the components associated with the generator, such as: the exciter is damaged, and the excitation voltage cannot be supplied. The excitation current is taken in. The residual magnetism of the rotor is weakened or declining, which will make the generator unable to generate electricity or the transmission voltage is extremely low.

The right to respond usually includes: using an appropriate DC voltage and polarity, directly connected to the excitation winding to magnetize. Carefully inspect the exciter and the cyclotron rectifier, find abnormal components or windings, and replace them for restoration.

The transmission voltage of the generator is unstable, and the belt voltage is poor, and the transmission voltage drops very fiercely. Usually, the automatic voltage regulator (AVR), the excitation generator and the gyro rectifier are faulty, which is the primary cause of this phenomenon. The negative feedback transfer function of the load change is invalid, and the components of the gyro rectifier department and the components of the excitation generator voltage setting circuit are damaged.Abnormalities in that area will cause the transmission voltage to be unstable.

The actions to be adopted are: focus on surveying the AVR, and use the imitation test method to check whether its sensitivity and transmission linearity are in line with the factory standard, and if there is an abnormality, it will be repaired. There are not many components of the circuit related to the cyclotron rectifier and the excitation generator. The first is the rectifier element and potentiometer. If there is damage, change it in real time.

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