Motor Top Speed RPM Calculator

Calculate the top (no-load) speed of an induction motor.
Using:
Synchronous Speed: \( n_{sync} = \frac{120\, f}{P} \)
Top Speed: \( n_{top} = n_{sync}(1 – s) \)

* Enter supply frequency (Hz), number of poles, and slip (as a decimal; e.g., 0.03 for 3%).

Step 1: Enter Motor Parameters

Supply Frequency, \( f \) (Hz):

Example: 60 Hz

Number of Poles, \( P \):

Example: 4 (typically even numbers: 2, 4, 6…)

Slip, \( s \) (decimal):

Example: 0.03 for 3% slip

Step 1: Enter Motor Parameters

Calculated Motor Speeds