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Motor Torque Formula:
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The motor torque calculation estimates the rotational force produced by an electric motor based on its power output and rotational speed. This is essential for determining the motor's performance characteristics and suitability for specific applications.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 is derived from unit conversion factors to provide 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 system design, and ensuring proper performance in industrial applications, automotive systems, and various mechanical drives.
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 from kW to Nm/s and rpm to rad/s.
Q2: What are typical torque values for electric motors?
A: Torque values vary widely depending 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 load resistance. Higher torque means better starting capability and ability to handle heavier loads.
Q4: Can this formula be used for all types of motors?
A: This formula applies to various electric motor types (AC, DC, induction, etc.) when calculating output torque based on power and speed.
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.