Parameter
RPM (Revolutions per Minute)
RPM is calculated by the formula:
RPM = (120 × Frequency) / Number of Poles
The frequency refers to the supply frequency (e.g., 50 Hz), while the number of poles depends on the motor’s design.
Parameter
Number of Pole Pairs
One can determine the number of pole pairs (P) by dividing the total number of poles (N) by 2:
P = N / 2
Ex: A 4-pole motor has 2 pole pairs.