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Torque Formula:
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Motor torque calculation determines the rotational force produced by an electric motor based on its power output and rotational speed. This is essential for selecting appropriate motors for various applications and ensuring proper system performance.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversion factors to ensure proper calculation of torque in Newton-meters when power is in kilowatts and speed is in revolutions per minute.
Details: Accurate torque calculation is crucial for motor selection, mechanical design, ensuring proper starting capability, and preventing motor overload in various industrial and mechanical applications.
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 the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion factors (60 seconds/minute ÷ 2π radians/revolution × 1000 watts/kilowatt) to convert between different measurement units.
Q2: What is the relationship between torque, power, and speed?
A: Torque is inversely proportional to speed when power is constant. Higher speed means lower torque, and vice versa, for the same power output.
Q3: Can this formula be used for all types of motors?
A: This formula applies to various electric motors including AC, DC, and induction motors, but specific motor characteristics may affect actual performance.
Q4: What are typical torque values for industrial motors?
A: Torque values vary widely based on motor size and application, ranging from less than 1 Nm for small motors to thousands of Nm for large industrial motors.
Q5: How does starting torque differ from running torque?
A: Starting torque is typically higher than running torque as motors need extra force to overcome inertia and static friction when starting from rest.