1. What is BLDC Motor Torque?

The torque of a BLDC (Brushless DC) motor is directly proportional to the current flowing through the motor windings. The torque constant (Kt) relates the current to the torque output.

2. How Does the Calculator Work?

The calculator uses the torque equation:

Where:

• \( \tau \) — Torque output (Nm)
• \( K_t \) — Torque constant (Nm/A)
• \( I \) — Current (amperes)

Explanation: The equation shows that torque increases linearly with current when the torque constant is known.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for motor selection, performance prediction, and ensuring the motor can handle the required mechanical load.

4. Using the Calculator

Tips: Enter the torque constant (typically provided in motor datasheets) in Nm/A and the current in amperes. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find the Kt value for my motor?
A: The torque constant is typically specified in the motor's datasheet, often listed as "Kt" or "Torque Constant."

Q2: Does this equation work for all motor types?
A: This specific equation is for BLDC motors. Other motor types may have different torque characteristics.

Q3: What affects the torque constant?
A: Kt is determined by motor design factors like number of windings, magnetic field strength, and motor geometry.

Q4: How does temperature affect torque?
A: Higher temperatures can reduce torque due to increased resistance in windings and changes in magnet strength.

Q5: What's the relationship between Kt and Kv?
A: In SI units, Kt (Nm/A) and Kv (V/rad/s) are inversely related when ignoring losses: Kt ≈ 1/Kv.