1. What is DC Motor Torque?

Torque in a DC motor is the rotational force produced by the motor shaft. It's a crucial parameter that 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
• \( N \) — Rotational speed in RPM (revolutions per minute)
• \( \pi \) — Mathematical constant Pi (~3.1416)
• 60 — Conversion factor from seconds to minutes

Explanation: The equation relates the motor's electrical power input to its mechanical torque output at a given speed.

3. Importance of Torque Calculation

Details: Knowing the torque helps in selecting the right motor for an application, ensuring it can handle the required load without stalling or overheating.

4. Using the Calculator

Tips: Enter the motor's power rating in watts and its operating speed in RPM. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between stall torque and running torque?
A: Stall torque is the maximum torque at zero speed, while running torque is the torque produced at operating speed.

Q2: How does voltage affect torque?
A: In DC motors, torque is directly proportional to current, which is affected by voltage. Higher voltage typically allows higher current and thus higher torque.

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: How does gear reduction affect torque?
A: Gear reduction increases output torque while decreasing speed, with the torque multiplication factor equal to the gear ratio.

Q5: Can I use this for AC motors?
A: This formula works for any motor type, but AC motors have additional factors like power factor that affect their performance.