1. What is DC Motor Torque?

Torque is the rotational force produced by a DC motor, measured in Newton-meters (Nm). It determines the motor's ability to perform work and overcome load resistance.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( P \) — Power in watts (W)
• \( N \) — Speed in revolutions per minute (RPM)
• \( \pi \) — Mathematical constant (~3.14159)

Explanation: The equation converts power (watts) to torque (Nm) considering the motor's rotational speed. The factor of 60 converts minutes to seconds.

3. Importance of Torque Calculation

Details: Understanding motor torque is essential for selecting the right motor for an application, ensuring it can handle the required mechanical load without stalling or overheating.

4. Using the Calculator

Tips: Enter power in watts and speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Newton-meters.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between torque and power?
A: Power is the rate of doing work, while torque is the rotational force. Power = Torque × Angular Velocity.

Q2: How does speed affect torque in DC motors?
A: For a given power, torque decreases as speed increases, and vice versa, following an inverse relationship.

Q3: What are typical torque values for small DC motors?
A: Small hobby motors might produce 0.01-0.1 Nm, while larger industrial motors can produce 10+ Nm.

Q4: Can I use this for AC motors?
A: This equation works for any motor when you know the mechanical power output and speed, but AC motors have additional factors like power factor.

Q5: How does voltage relate to torque?
A: In DC motors, torque is directly proportional to current. Higher voltage can increase current (and thus torque) if not limited by motor resistance.