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Electric Motor Torque Formula:
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Electric motor torque is the rotational force produced by an electric motor. It represents the motor's ability to perform work and is a crucial parameter in motor selection and application design.
The calculator uses the torque formula:
Where:
Explanation: The formula calculates the torque output of an electric motor based on its power rating and rotational speed, using the standard conversion factor of 9550.
Details: Accurate torque calculation is essential for proper motor selection, ensuring the motor can handle the required load, preventing overload conditions, and optimizing energy efficiency in various applications.
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 is derived from unit conversions (60 seconds/minute × 1000 watts/kilowatt ÷ 2π radians/revolution) to convert between kW, rpm, and Nm.
Q2: What is a typical torque range for electric motors?
A: Torque ranges vary significantly based on motor size and type, from fractions of 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 load resistance. Higher torque allows the motor to handle heavier loads or accelerate faster.
Q4: Can this formula be used for all types of electric motors?
A: This formula provides theoretical torque output and applies to most AC and DC motors, though actual torque may vary due to efficiency losses and motor characteristics.
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.