1. What is BLDC Motor Power Calculation?

The BLDC (Brushless DC) motor power calculation determines the mechanical power output of the motor based on its torque and rotational speed. This is essential for motor selection and system design.

2. How Does the Calculator Work?

The calculator uses the power equation:

Where:

• \( Torque \) — Motor torque in Newton-meters (Nm)
• \( Speed \) — Rotational speed in revolutions per minute (RPM)
• \( 9.5488 \) — Conversion factor (30/π) to convert to Watts

Explanation: The equation converts the product of torque and angular velocity (in RPM) to mechanical power in Watts.

3. Importance of Power Calculation

Details: Accurate power calculation is crucial for matching motors to applications, determining system efficiency, and ensuring proper thermal management.

4. Using the Calculator

Tips: Enter torque in Nm and speed in RPM. Both values must be positive numbers. The calculator will output power in Watts.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mechanical and electrical power?
A: Mechanical power is the output at the shaft, while electrical power is the input to the motor. The difference represents losses.

Q2: How does voltage affect BLDC motor power?
A: Higher voltage typically allows higher speed, but power ultimately depends on the torque-speed product.

Q3: What is typical efficiency for BLDC motors?
A: Efficiency typically ranges from 80-95%, depending on size and design.

Q4: How does temperature affect these calculations?
A: Temperature affects winding resistance and magnetic properties, which can impact torque production.

Q5: Can this be used for other motor types?
A: The basic power calculation applies to all rotating machinery, but specific motor characteristics differ.