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Why DC excitation is used for alternators? Why cant it be AC?
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Answer Posted / b.t.ramakrishna rao
a current carrying conductor placed in a magnetic filed experiences a force
if d.c excitation is provided a constant magnetic field is produced hence the rotor conductors can experience a force.
where as if a.c excitation is given an alternating magnetic field is produced which results zero net magnetic filed,hence the rotor conductors fials to experience a force
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