Calculate Motor Torque From Power And Rpm

Motor Torque Formula:

\[ T = \frac{P \times 60}{2 \times \pi \times RPM} \]

Torque (T):

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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. It's a fundamental parameter in mechanical engineering and motor selection.

2. How Does the Calculator Work?

The calculator uses the torque formula:

\[ T = \frac{P \times 60}{2 \times \pi \times RPM} \]

Where:

\( T \) — Torque (Newton-meters)
\( P \) — Power (Watts)
\( RPM \) — Rotations per minute
\( \pi \) — Mathematical constant Pi (approximately 3.1416)
60 — Conversion factor from minutes to seconds

Explanation: The formula converts power (work per unit time) to torque (rotational force) by accounting for the motor's rotational speed.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for proper motor selection, mechanical design, ensuring adequate starting torque, and preventing motor overload in various applications.

4. Using the Calculator

Tips: Enter power in watts and RPM in revolutions per minute. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between torque, power, and RPM?
A: Torque is inversely proportional to RPM when power is constant. Higher RPM means lower torque for the same power output.

Q2: What are typical torque values for electric motors?
A: Torque values vary widely based on motor size and type, ranging from fractional Nm for small motors to thousands of Nm for large industrial motors.

Q3: Why is the 60 factor included in the formula?
A: The factor 60 converts RPM (revolutions per minute) to revolutions per second, since power is measured in watts (joules per second).

Q4: Can this formula be used for all types of motors?
A: This formula applies to any rotating machine where power and rotational speed are known, including AC/DC motors, engines, and turbines.

Q5: How does torque affect motor performance?
A: Torque determines a motor's ability to overcome load resistance. Higher torque enables motors to start under heavy loads and maintain operation.