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Electric Motor Torque Formula:
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The electric motor torque formula calculates the rotational force produced by an electric motor based on its power output and rotational speed. This is essential for understanding motor performance and selecting appropriate motors for specific applications.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversions to ensure proper calculation of torque in Newton-meters when power is in kilowatts and speed is in revolutions per minute.
Details: Accurate torque calculation is crucial for motor selection, mechanical design, and ensuring that motors can provide sufficient rotational force for their intended applications without overloading.
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 to calculate torque in Nm when power is in kW and speed is in rpm.
Q2: What are typical torque values 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 resistance and perform work. Higher torque means better ability to handle heavy loads and accelerate quickly.
Q4: Can this formula be used for all types of electric motors?
A: This formula provides a general calculation for rotational torque and can be applied to various AC and DC electric motors when power and speed are known.
Q5: How does torque change with motor speed?
A: For many electric motors, torque remains relatively constant across the speed range, though specific motor types may have different torque-speed characteristics.