Synchronous Speed Calculation for Four-Pole 60 Hz Motor
What is the formula to calculate the synchronous speed of a four-pole 60 Hz motor?
Choose the correct answer:
Answer:
The synchronous speed, n_s, of a four-pole 60 Hz motor is calculated using the formula: n_s = 120f/P. Substituting the respective values, we find that n_s equals 1800 rpm. Therefore, the correct answer is B) 1,800 rpm.
Explanation:
The synchronous speed of a motor, n_s, can be calculated using the formula: n_s = 120f/P, where f is the frequency and P is the number of poles.
In the case of a four-pole 60 Hz motor, we substitute the respective values into the formula:
n_s = 120*60/4 = 1800 rpm.
This means that the magnetic field of the motor rotates at a speed of 1800 rpm in synchrony with the stator.