How is the speed of a squirrel-cage induction motor determined?
Official USCG Answer & Rule Citation
Correct Answer: Option B — number of stator poles
Synchronous speed in an AC induction motor is determined by the formula Ns = 120f / P, where 'f' is the supply frequency and 'P' is the number of stator poles. Changing the number of poles is the primary method for altering the motor's base synchronous speed.
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