How to find RPM and Pole Pairs in Induction Motors?

Calculation

[color=#ff7700] Parameter [/color]

[color=#1e00a3] RPM (Revolutions per Minute) [/color]

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.

[color=#ff7700] Parameter [/color]

[color=#1e00a3] Number of Pole Pairs [/color]

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.