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Electric Motor Torque Formula:
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The electric motor torque calculation determines the rotational force produced by an electric motor based on its power output and rotational speed. Torque is a crucial parameter in motor selection and application design.
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 unit conversions through the constant 9550.
Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required mechanical load, and for designing mechanical systems that rely on specific torque values.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion factors that relate kilowatts, Newton-meters, and revolutions per minute (60 seconds/minute × 1000 watts/kilowatt ÷ 2π radians/revolution ≈ 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 a motor's ability to overcome resistance and accelerate loads. Higher torque allows motors to handle heavier loads or accelerate faster.
Q4: Are there different torque calculations for AC vs DC motors?
A: While the basic torque formula applies to both, specific motor types may have additional considerations for starting torque, breakdown torque, or efficiency factors.
Q5: Can this formula be used for hydraulic or pneumatic motors?
A: The same fundamental relationship between power, speed, and torque applies to all rotational prime movers, though specific efficiency factors may differ.