Calcolatrice Potenza all'Albero Gratuita
Calcola la potenza all'albero da coppia e numero di giri.
Shaft Power
15.71 kW
Shaft Power vs Shaft Torque (T)
Formula
Shaft Power from Torque and Speed
Rotational power is the product of torque and angular velocity.
Formula
P = T omega = T (2 pi N / 60)
where T is torque in N-m, N is speed in RPM, and P is power in watts. Dividing by 1000 gives kilowatts. One horsepower equals 746 watts.
Esempio Risolto
A shaft transmitting 100 N-m torque at 1500 RPM.
- 01omega = 2 x pi x 1500 / 60 = 157.08 rad/s
- 02P = 100 x 157.08 = 15,708 W = 15.71 kW
- 03P = 15,708 / 746 = 21.06 hp
Domande Frequenti
What is the difference between shaft power and electrical power?
Shaft (mechanical) power is what the motor delivers at its shaft. Electrical power input is higher due to motor losses. Motor efficiency = shaft power / electrical input power, typically 85-95%.
How do I measure shaft torque?
Shaft torque can be measured with a strain-gauge torque transducer, a reaction-force torque arm, or calculated from motor current draw and speed. Inline torque sensors are the most accurate method.
Can I use this for pumps and compressors?
Yes. If you know the torque and speed of a pump or compressor shaft, this formula gives the mechanical power input to the machine.
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