1. What is Motor Torque?

Torque is a rotational force that causes an object to rotate about an axis. In motors, it's the twisting force that generates rotation and determines the motor's ability to perform work.

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 power output of a motor to its rotational speed, showing that torque decreases as speed increases for a given power.

3. Importance of Torque Calculation

Details: Calculating torque is essential for selecting the right motor for an application, ensuring it can provide enough rotational force to drive the load at the required speed.

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: 9550 combines the conversion factors between kW, RPM, and Nm (60 from seconds to minutes, 1000 from watts to kilowatts, and 2π for radians).

Q2: What's the difference between torque and power?
A: Torque is the rotational force, while power is the rate at which work is done (torque × angular velocity).

Q3: How does speed affect torque?
A: For a given power, torque decreases as speed increases. This is why high-torque applications often use gear reducers.

Q4: What are typical torque values for electric motors?
A: Small motors might produce 1-10 Nm, while industrial motors can produce hundreds or thousands of Nm, especially at lower speeds.

Q5: Can I use this for hydraulic motors?
A: Yes, the same formula applies to any rotational power transmission system, though hydraulic motors often specify torque directly.