1. What is Motor Torque?

Motor torque is the rotational force produced by a motor. It's a crucial parameter in mechanical systems that determines the motor's ability to perform work and overcome resistance.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( P \) — Power in kilowatts (kW)
• \( N \) — Rotational speed in revolutions per minute (RPM)
• 9550 — Conversion factor combining unit conversions and constants

Explanation: The formula relates the motor's power output to its rotational speed, showing that torque decreases as speed increases for a given power.

3. Importance of Torque Calculation

Details: Proper torque calculation is essential for selecting the right motor for an application, ensuring adequate performance without over-sizing, and preventing mechanical failures.

4. Using the Calculator

Tips: Enter power in kW and speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Nm.

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: It combines the conversion factors between kW to W (1000), minutes to seconds (60), and the relationship between radians and revolutions (2π) into one constant (60000/2π ≈ 9550).

Q2: What are typical torque values for motors?
A: Torque varies greatly by motor size. Small motors might produce <1 Nm while large industrial motors can produce thousands of Nm.

Q3: How does torque relate to power?
A: Power is the product of torque and angular velocity (P = T × ω). For a given power, higher speed means lower torque and vice versa.

Q4: What if my motor power is in horsepower?
A: First convert horsepower to kW (1 HP ≈ 0.7457 kW) before using this calculator.

Q5: Does this formula work for all motor types?
A: Yes, it's a general relationship between power, speed, and torque that applies to all rotating machinery, though actual performance may vary based on motor characteristics.