1. What is Motor Torque?

Motor torque is the rotational force produced by an electric motor. It's a crucial parameter that determines the motor's ability to perform work and overcome resistance. Maximum torque typically occurs at the motor's rated power and speed.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( Torque \) — Rotational force in Newton-meters (N·m)
• \( P \) — Power in kilowatts (kW)
• \( RPM \) — Rotational speed in revolutions per minute
• 9550 — Conversion constant (derived from 60,000/(2π))

Explanation: The formula relates power and rotational speed to torque, with the constant 9550 converting units appropriately.

3. Importance of Torque Calculation

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

4. Using the Calculator

Tips: Enter the motor's rated power in kW and its rotational speed at maximum power in RPM. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: It's a conversion constant that accounts for unit transformations (kW to W, minutes to seconds, radians to revolutions).

Q2: Does this calculate peak or continuous torque?
A: This calculates the continuous torque at maximum power. Peak torque during startup may be higher.

Q3: How does torque relate to horsepower?
A: Horsepower can be converted to kW (1 HP ≈ 0.7457 kW) for use in this formula.

Q4: Can I use this for engines as well as motors?
A: Yes, the formula works for any rotational power source when you know the power and RPM at a given operating point.

Q5: What if my motor has variable speed?
A: Use the RPM value at the power point where you want to know the torque. Torque varies inversely with speed for a given power.