synchronous machine

noun

Definition of synchronous machine 

: a dynamoelectric machine (such as a generator or motor) that has a constant magnetic field and an armature which receives or delivers alternating current in synchronism with the motion of the machine and at a frequency equal to the product of the number of pairs of poles and the speed of the machine in revolutions per second — compare alternator, converter sense b, motor sense 4, rectifier sense 3, synchronous converter

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