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Three-Phase Motor Torque Formula:
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The three-phase 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 industrial systems.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversion factors that relate power in kilowatts to torque in Newton-meters at a given rotational speed.
Details: Accurate torque calculation is crucial for selecting appropriate motors for specific applications, ensuring proper performance, and preventing mechanical failures in driven equipment.
Tips: Enter power in kilowatts and rotational speed in 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 the conversion between different units of measurement (kW to W, minutes to seconds, and radians conversion) to yield torque in Newton-meters.
Q2: What is typical torque range for industrial three-phase motors?
A: Torque values vary significantly based on motor size and design, ranging from a few Nm for small motors to thousands of Nm for large industrial motors.
Q3: How does motor torque relate to mechanical power?
A: Torque represents the rotational force, while power represents the rate of doing work. The relationship is defined by the formula P = T × ω, where ω is angular velocity.
Q4: Are there different types of torque in electric motors?
A: Yes, motors have starting torque, breakdown torque, and full-load torque, each important for different aspects of motor performance and application suitability.
Q5: How does voltage affect motor torque?
A: For induction motors, torque is approximately proportional to the square of the voltage. Voltage variations can significantly impact motor performance and torque output.