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Why DC excitation is used for alternators? Why cant it be AC?
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Answer Posted / shyamalmandirwala
Actually the answer is like this:
When we are giving DC excitation to the AC machine,we are
imposing DC on AC.
In this case the Resulting Frequency (Fr) will be the
difference of the two.
Hence in this case,Fr = 50 - 0 = 50Hz
and hence we get the excitation at desired frequency,where
as if we provide AC excitation, then Fr will become 0Hz &
so no excitating magnetic field will be created...
| Is This Answer Correct ? | 8 Yes | 11 No |
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