1. What is the Torque Equation?

The torque equation calculates the rotational force produced by a BLDC motor based on its power output and rotational speed (RPM). This is fundamental for motor selection and performance analysis in electromechanical systems.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( Power \) — Mechanical power output in Watts
• \( RPM \) — Rotational speed in revolutions per minute
• \( \pi \) — Mathematical constant pi (~3.1416)
• The factor \( \frac{\pi}{30} \) converts RPM to radians per second

Explanation: The equation derives from the fundamental relationship between power, torque, and angular velocity (P = τ × ω).

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for motor sizing, performance prediction, and ensuring the motor can handle the required mechanical load without stalling or overheating.

4. Using the Calculator

Tips: Enter power in Watts and RPM in revolutions per minute. Both values must be positive numbers. The calculator will compute the torque in Newton-meters (N·m).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between electrical and mechanical power in this calculation?
A: This calculator uses mechanical power output. For electrical input power, you would need to account for motor efficiency.

Q2: How does torque relate to motor performance?
A: Torque determines the motor's ability to overcome load resistance. Higher torque means better ability to start under load and handle variable loads.

Q3: Why convert RPM to radians per second?
A: The fundamental power-torque relationship uses angular velocity in radians per second (SI units), hence the conversion from RPM.

Q4: What affects torque in BLDC motors?
A: Torque depends on current, magnetic flux, and motor design. It's directly proportional to current in the linear operating region.

Q5: How does this relate to motor curves?
A: This gives a single operating point. Complete performance requires analyzing the torque-speed curve across the motor's operating range.