1. What is Motor Torque?

Torque is the rotational force produced by a motor. For a 1 HP motor, the torque varies inversely with the rotational speed (RPM). This calculator helps determine the torque output of a 1 horsepower motor at different speeds.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• 1 — Motor power in horsepower (HP)
• 746 — Conversion factor from HP to watts
• 9550 — Constant for torque calculation
• RPM — Rotational speed in revolutions per minute

Explanation: The formula converts horsepower to watts, then calculates the torque based on the motor's rotational speed.

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 and operate efficiently.

4. Using the Calculator

Tips: Enter the motor's RPM value (must be greater than 0). The calculator will compute the torque in Newton-meters (Nm).

5. Frequently Asked Questions (FAQ)

Q1: Why does torque decrease as RPM increases?
A: Power is the product of torque and speed. For constant power (1 HP in this case), torque must decrease as speed increases.

Q2: What is a typical torque range for a 1 HP motor?
A: At 1725 RPM, torque is about 4.1 Nm. At 3450 RPM, it's about 2.1 Nm. Torque varies inversely with speed.

Q3: Can this calculator be used for motors with different HP ratings?
A: No, this is specifically for 1 HP motors. For other ratings, the formula would need to be adjusted.

Q4: What factors affect motor torque in real applications?
A: Load conditions, efficiency losses, voltage variations, and temperature can all affect actual torque output.

Q5: How does this relate to motor starting torque?
A: This calculates running torque. Starting torque is typically higher and depends on motor design.