1. What is the Torque Equation?

The torque equation \(\tau = I \times \alpha + Friction\) calculates the total torque required from a BLDC motor, accounting for both the acceleration torque and friction torque. This is essential for proper motor sizing and control system design.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( \tau \) — Total torque required (Nm)
• \( I \) — Moment of inertia (kg·m²)
• \( \alpha \) — Angular acceleration (rad/s²)
• \( Friction \) — Friction torque (Nm)

Explanation: The equation accounts for both the torque needed to accelerate the rotating mass and the torque needed to overcome friction.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for selecting the right BLDC motor, ensuring proper acceleration performance, and preventing motor overload.

4. Using the Calculator

Tips: Enter moment of inertia in kg·m², angular acceleration in rad/s², and friction torque in Nm. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine moment of inertia?
A: For simple shapes, use standard formulas. For complex systems, use CAD software or experimental methods like the trifilar pendulum test.

Q2: What's a typical angular acceleration value?
A: Depends on application. Robotics might use 10-100 rad/s², while industrial machines might use 1-10 rad/s².

Q3: How to measure friction torque?
A: Can be measured by running the motor at constant speed and measuring current, or using a torque sensor at very low speeds.

Q4: Does this include load torque?
A: No, this calculates only acceleration and friction torque. Add any external load torque to the result for total required torque.

Q5: What safety factor should I use?
A: Typically 1.5-2x for industrial applications, up to 3x for safety-critical systems.