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Motor Torque Formula:
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Motor torque is the rotational force produced by an electric motor. It's a crucial parameter in determining a motor's ability to perform work and overcome resistance in mechanical systems.
The calculator uses the motor torque formula:
Where:
Explanation: This formula calculates the torque output of a motor based on its power rating and rotational speed, with the constant 9550 accounting for unit conversions between kW, rpm, and Nm.
Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load, preventing overheating, and optimizing energy efficiency in mechanical 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 conversions: 9550 = 60/(2π) × 1000, which converts power from kW to W, speed from rpm to rad/s, and accounts for the 2π radians in a revolution.
Q2: What is a typical torque range for electric motors?
A: Torque values vary significantly based on motor size and type, ranging from less than 1 Nm for small motors to several thousand Nm for large industrial motors.
Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to start under load, accelerate, and maintain operation against resistance. Higher torque generally means better performance under heavy loads.
Q4: Can this formula be used for all types of motors?
A: This formula provides a general calculation for rotational mechanical power. While it applies to most electric motors, specific motor types may have additional factors affecting torque output.
Q5: How does voltage affect motor torque?
A: For many electric motors (especially DC and AC induction motors), torque is proportional to the square of the voltage. Lower voltage typically results in reduced torque output.