Yes, the field coils of a separately excited generator can be over-excited.
When the field coils are over-excited, the magnetic field produced by the field coils becomes stronger than usual. This results in an increase in the generated voltage of the generator. However, if the field coils are over-excited too much, it can lead to excessive voltage output, which may exceed the rated voltage of the generator and potentially damage the electrical components connected to it.
Therefore, it is important to carefully regulate the excitation level of the field coils in a separately excited generator to ensure that the generated voltage remains within safe limits. This can be done by adjusting the field current using a separate excitation control system or regulator.
In the case of a separately excited generator, can the field coils be over-excited? Explain
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