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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. This is essential for proper motor selection and application in various mechanical systems.
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, using the appropriate conversion factor.
Details: Accurate torque calculation is crucial for selecting the right motor for specific applications, ensuring proper performance, and preventing mechanical failures in driven equipment.
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 the conversion factors between different units (kW to W, minutes to seconds, and radians conversion) to get torque in Nm.
Q2: What is a typical torque range 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. Higher torque means better starting and load-handling capability.
Q4: Can this formula be used for all types of electric motors?
A: This formula provides theoretical torque for ideal conditions. Actual torque may vary based on motor efficiency, design, and operating conditions.
Q5: How does speed affect motor torque?
A: For a given power, torque decreases as speed increases, following the inverse relationship shown in the formula.