// multi-utility computation suite · offline · instant · precise
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eng.induction-motor-slip Calculator
Calculates induction motor slip, rotor speed, slip frequency, and rotor current from synchronous speed and measured shaft speed. Motor slip of 2–5% is normal at full load — as the motor approaches synchronous speed (zero slip), the torque falls to zero.
Inputs
Synchronous Speed Rpm
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Rotor Speed Rpm
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Rated Torque Nm
Rotational force (N·m) = force × perpendicular lever arm. Engine torque peaks at lower RPM; horsepower peaks higher.
Rated Power Kw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
Results
slip fraction s
Slip -- the difference between synchronous speed and actual rotor speed in an induction motor, as a fraction. Normal slip: 2-8%. Higher slip means more torque but more heat.
slip (%)
Slip -- the difference between synchronous speed and actual rotor speed in an induction motor, as a fraction. Normal slip: 2-8%. Higher slip means more torque but more heat.
rotor frequency (Hz)
Sample size or count used in the calculation.
rotor copper loss (W)
The decrease or degradation from the baseline.
mechanical power (W)
Sample size or count used in the calculation.
P_mech = (1-s) × P_air_gap
Reference formula or conversion factor shown for context.