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Motor Torque Formula:
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The motor torque calculation formula is used to determine the torque produced by an electric motor based on its power output and rotational speed. It provides a fundamental relationship between these key motor parameters.
The calculator uses the torque formula:
Where:
Explanation: The formula calculates the rotational force (torque) that a motor can produce at a given power output and speed. The constant 9550 comes from the conversion of units (kW to W and rpm to rad/s).
Details: Accurate torque calculation is essential for motor selection, mechanical system design, and ensuring proper performance in various applications from industrial machinery to automotive systems.
Tips: Enter power in kilowatts (kW) and rotational speed in revolutions per minute (rpm). Both values must be positive numbers greater than zero.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversions: 60/(2π) × 1000 ≈ 9550, which converts kW to W and rpm to rad/s.
Q2: Can this formula be used for all types of motors?
A: This formula provides theoretical torque for electric motors at a given power and speed, but actual torque may vary based on motor type, efficiency, and operating conditions.
Q3: What are typical torque values for industrial motors?
A: Torque values vary widely based on motor size and application, ranging from less than 1 Nm for small motors to thousands of Nm for large industrial motors.
Q4: How does torque relate to motor performance?
A: Torque determines a motor's ability to overcome load resistance. Higher torque allows a motor to accelerate heavier loads or maintain speed under greater resistance.
Q5: Can I calculate power if I know torque and speed?
A: Yes, the formula can be rearranged: P = (T × N) / 9550, where P is in kW, T in Nm, and N in rpm.