A 4-pole, 50 Hz, 3-phase AC motor has a synchronous speed of 1500 rpm. What is the number of poles on a 10-pole, 50 Hz, 3-phase AC alternator that has the same synchronous speed?
Q1. A 4-pole, 50 Hz, 3-phase AC motor has a synchronous speed of 1500 rpm. What is the number of poles on a 10-pole, 50 Hz, 3-phase AC alternator that has the same synchronous speed?
Answer: 6
Explanation: Using the synchronous speed formula, the number of poles is calculated from n = 120 * f / P, giving 6 poles