1. What is the DC Motor Torque Equation?

The DC motor torque equation relates the motor's mechanical power output to its speed and torque. It provides a fundamental relationship between these key motor parameters.

2. How Does the Calculator Work?

The calculator uses the DC motor torque equation:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( P \) — Power in watts
• \( N \) — Speed in revolutions per minute (RPM)
• \( \pi \) — Mathematical constant (~3.14159)
• 60 — Conversion factor from seconds to minutes

Explanation: The equation converts power (energy per unit time) to torque (rotational force) at a given rotational speed.

3. Importance of Torque Calculation

Details: Torque calculation is essential for motor selection, mechanical design, and ensuring the motor can handle the required load under all operating conditions.

4. Using the Calculator

Tips: Enter power in watts and speed in RPM. Both values must be positive numbers. For best results, use manufacturer-specified values.

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 in DC motors?
A: For a given motor, torque is directly proportional to current, which is affected by the applied voltage.

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

Q4: How does gear reduction affect torque?
A: Gear reduction increases output torque while decreasing speed, with the power remaining roughly constant (minus efficiency losses).

Q5: Can I use this for AC motors?
A: This simple equation works for DC motors. AC motor torque calculations are more complex due to power factor considerations.