1. What is an Electric Motor Torque Calculator?

Definition: This calculator computes the torque produced by an electric motor based on its horsepower and rotational speed.

Purpose: It helps engineers, technicians, and hobbyists determine the twisting force a motor can generate at a given speed.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( HP \) — Horsepower
• \( RPM \) — Rotational speed (revolutions per minute)
• 5252 — Conversion constant (derived from the relationship between HP, RPM, and torque)

Explanation: Torque is inversely proportional to RPM when horsepower is constant. The constant 5252 comes from the conversion between rotational and linear power.

3. Importance of Torque Calculation

Details: Knowing a motor's torque is essential for proper motor selection, ensuring it can handle the required mechanical load without stalling.

4. Using the Calculator

Tips: Enter the motor's horsepower rating and its operating RPM. Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the formula?
A: 5252 RPM is the point where horsepower and torque (in lb-ft) are numerically equal in the formula, derived from unit conversions.

Q2: What's a typical torque range for electric motors?
A: Torque varies widely - small motors might produce 1-10 lb-ft, while industrial motors can generate thousands of lb-ft.

Q3: Does this work for all motor types?
A: Yes, the formula applies to all rotating machinery, though actual performance may vary with motor design.

Q4: How does torque relate to motor performance?
A: Torque determines a motor's ability to do work (turn a load), while horsepower combines torque and speed.

Q5: What if my motor specs are in different units?
A: Convert kW to HP (1 kW ≈ 1.341 HP) or Nm to lb-ft (1 Nm ≈ 0.7376 lb-ft) before using the calculator.