Home
Back
Torque Formula:
| From: | To: |
The torque calculation formula for electric motors estimates the rotational force produced by the motor based on its power output and rotational speed. It provides a fundamental measure of the motor's mechanical performance capabilities.
The calculator uses the torque formula:
Where:
Explanation: The formula converts power in kilowatts and speed in revolutions per minute to torque in Newton-meters, accounting for the relationship between rotational power and mechanical force.
Details: Accurate torque calculation is crucial for motor selection, mechanical system design, performance analysis, and ensuring proper matching between motors and their driven loads.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is 9550 used in the formula?
A: The constant 9550 is derived from unit conversions (60 seconds/minute ÷ 2π radians/revolution × 1000 watts/kilowatt ≈ 9550).
Q2: What are typical torque values for electric motors?
A: Torque values vary significantly based on motor size and type, ranging from fractional Nm for small motors to thousands of Nm for large industrial motors.
Q3: How does torque relate to motor performance?
A: Torque determines the motor's ability to overcome load resistance and accelerate rotating masses, directly affecting the motor's mechanical output capabilities.
Q4: Are there limitations to this formula?
A: This formula provides theoretical maximum torque and assumes 100% efficiency. Actual torque may vary due to efficiency losses, power factor, and motor characteristics.
Q5: Can this formula be used for all motor types?
A: The formula applies to all rotating electrical machines, but specific motor types (induction, synchronous, DC) may have different torque-speed characteristics.