Determine the minimum number of poles for the motor, Electrical Engineering

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Q. From a three-phase, 60-Hz system, through a motor-generator set consisting of two directly coupled synchronous machines, electric power is supplied to a three-phase, 50-Hz system.

(a) Determine the minimum number of poles for the motor.

(b) Determine the minimum number of poles for the generator.

(c) With the number of poles decided, find the speed in r/min at which the motor-generator set will operate.


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