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Motor Torque Formula:
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Motor torque calculation determines the rotational force produced by an electric motor. It's a critical parameter in mechanical engineering for selecting appropriate motors for various applications and ensuring proper system performance.
The calculator uses the torque formula:
Where:
Explanation: The formula calculates the torque output of a motor based on its power rating and rotational speed, with the constant 9550 converting between different measurement units.
Details: Accurate torque calculation is essential for proper motor selection, ensuring mechanical systems operate efficiently, preventing overload conditions, and matching motor capabilities to application requirements.
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 conversions: 60,000/(2π) ≈ 9550, which converts between kW, rpm, and Nm units.
Q2: What are typical torque values for electric motors?
A: Torque values vary significantly based on motor size and type, ranging from less than 1 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 perform work. Higher torque allows motors to drive heavier loads or accelerate faster.
Q4: Can this formula be used for all types of motors?
A: This formula provides theoretical maximum torque for electric motors at a given power and speed, but actual torque may vary based on motor design and efficiency.
Q5: How does torque change with motor speed?
A: For constant power applications, torque decreases as speed increases, following an inverse relationship as shown in the formula.