1. What is the DC Motor Torque Equation?

The DC motor torque equation relates the motor's mechanical power output to its rotational speed. It provides a fundamental relationship between torque, power, and speed in DC motors.

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
• \( N \) — Rotational speed in revolutions per minute (RPM)
• \( \pi \) — Mathematical constant Pi (~3.1416)
• 60 — Conversion factor from seconds to minutes

Explanation: The equation converts power (energy per unit time) to torque (rotational force) at a given speed, accounting for unit conversions between seconds and minutes.

3. Importance of Torque Calculation

Details: Torque calculation is essential for motor selection, determining mechanical advantage, sizing drive components, and ensuring proper system performance under load.

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: Torque is rotational force, while power is the rate of doing work. Power = Torque × Angular Velocity.

Q2: How does speed affect torque in DC motors?
A: For constant power, torque decreases as speed increases, following an inverse relationship.

Q3: What are typical torque values for DC motors?
A: Torque varies widely by motor size - from millinewton-meters in small hobby motors to hundreds of Newton-meters in industrial motors.

Q4: Can I use this for AC motors?
A: This equation works for any motor at steady state, but AC motor behavior differs under variable loads and speeds.

Q5: How accurate is this calculation?
A: It provides theoretical torque at the shaft. Actual torque may vary due to efficiency losses, load conditions, and motor characteristics.