1. What is DC Motor Torque?

Torque is the rotational force produced by a DC motor. It's a crucial parameter that determines the motor's ability to perform work and is directly related to the motor's power and speed.

2. How Does the Calculator Work?

The calculator uses the DC motor torque formula:

Where:

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

Explanation: The formula converts power (energy per unit time) to torque (rotational force) considering the motor's speed.

3. Importance of Torque Calculation

Details: Knowing a motor's 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 relationship between torque and speed?
A: In DC motors, torque and speed have an inverse relationship at constant power - as speed increases, torque decreases, and vice versa.

Q2: How does voltage affect torque?
A: For a given motor, increasing voltage typically increases both speed and available torque, up to the motor's design limits.

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 hundreds of Nm.

Q4: Can I calculate power from torque and speed?
A: Yes, you can rearrange the formula: \( P = \frac{T \times 2 \times \pi \times N}{60} \)

Q5: What's the difference between stall torque and rated torque?
A: Stall torque is the maximum torque at zero speed, while rated torque is the continuous torque the motor can produce without overheating.