1. What is Motor Torque Calculation?

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 various mechanical systems.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (Newton-meters)
• \( P \) — Power (kilowatts)
• \( N \) — Rotational speed (revolutions per minute)

Explanation: The constant 9550 is derived from unit conversion factors to calculate torque in Nm from power in kW and speed in rpm.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for motor sizing, mechanical design, ensuring proper system performance, and preventing motor overload or underutilization.

4. Using the Calculator

Tips: Enter power in kilowatts and rotational speed in RPM. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 comes from unit conversion factors (60 seconds/minute divided by 2π radians, multiplied by 1000 watts/kilowatt).

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 a motor's ability to overcome load resistance and accelerate rotating masses. Higher torque enables handling heavier loads.

Q4: Are there different torque measurements?
A: Yes, motors have starting torque, breakdown torque, and full-load torque. This calculator provides theoretical full-load torque.

Q5: Can this formula be used for all motor types?
A: This formula provides theoretical torque for electric motors but actual torque may vary due to efficiency losses, power factor, and motor design characteristics.