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Torque Formula:
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Motor torque is the rotational force produced by a motor. It represents the motor's ability to perform work and is a critical parameter in mechanical systems, determining how much load a motor can handle at a given speed.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversions between kW, rpm, and Nm to provide torque in Newton-meters.
Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load without stalling or overheating. It's crucial in applications ranging from industrial machinery to automotive systems.
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: 60,000/(2π) ≈ 9550, which converts power in kW and speed in rpm to torque in Nm.
Q2: What is the difference between torque and power?
A: Torque is the rotational force, while power is the rate at which work is done. Power equals torque multiplied by angular velocity.
Q3: How does speed affect torque in electric motors?
A: In most electric motors, torque decreases as speed increases, following a characteristic curve specific to the motor type.
Q4: Can I use this formula for all types of motors?
A: This formula provides theoretical torque based on power and speed, but actual torque may vary due to efficiency losses, motor design, and operating conditions.
Q5: What are typical torque values for different motor sizes?
A: Torque values vary significantly based on motor design and application. Small motors might produce less than 1 Nm, while large industrial motors can produce thousands of Nm.