mainly alternator,synchronous motor comes under the synchronous
machine.a synchronous motor is not a self starting motor.if a
synchronous motor moves with more than synchronous speed then it
acts as a synchronous generator.
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a synchronous condenser is over excited synchronous motor under
no load
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Synchronous
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By definition a synchronous generator must be synchronous. If it
is not "locked in" it is not a synchronous generator, but an
induction machine.