Home
Back
Power Calculation Formula:
| From: | To: |
The power calculation formula P = (T × N) / 9550 calculates mechanical power from torque and rotational speed. It provides an accurate assessment of power output in kilowatts based on torque in Newton-meters and rotational speed in RPM.
The calculator uses the power calculation formula:
Where:
Explanation: The formula converts the product of torque and rotational speed into power output, with the constant 9550 accounting for unit conversion from Nm·rpm to kW.
Details: Accurate power calculation is crucial for mechanical system design, motor selection, performance analysis, and energy efficiency assessments in various engineering applications.
Tips: Enter torque in Newton-meters (Nm) and rotational speed in revolutions per minute (rpm). All values must be valid positive numbers.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 is derived from unit conversion factors to convert from Nm·rpm to kW (1 kW = 1000 W, 1 minute = 60 seconds, 2π radians per revolution).
Q2: What are typical torque values for different applications?
A: Torque values vary widely depending on application - from fractional Nm for small motors to thousands of Nm for industrial machinery and automotive applications.
Q3: Can this formula be used for both electric and mechanical systems?
A: Yes, this formula is universal and can be applied to any rotating system where torque and rotational speed are known, regardless of the power source.
Q4: How does power relate to energy consumption?
A: Power represents the rate of energy transfer. Energy consumption is calculated by multiplying power by time (Energy = Power × Time).
Q5: What are the limitations of this calculation?
A: This calculation provides theoretical mechanical power and doesn't account for efficiency losses, friction, or other real-world factors that affect actual power output.