1. What is the Brushless Motor RPM Calculation?

The RPM calculation for a 12V brushless motor helps determine the output speed of the motor when paired with a specific gear ratio. This is essential for selecting the right motor and gear combination for your application.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( Kv \) — Motor velocity constant (RPM per volt)
• \( Gear\ Ratio \) — Ratio between motor speed and output speed
• 12 — Voltage of the power supply (12V)

Explanation: The equation calculates the no-load RPM of a 12V brushless motor after accounting for the gear reduction.

3. Importance of RPM Calculation

Details: Knowing the output RPM is crucial for applications requiring specific speed ranges, such as RC vehicles, drones, or industrial machinery. It helps ensure the motor operates within its optimal performance range.

4. Using the Calculator

Tips: Enter the motor's Kv rating (found in its specifications) and the desired gear ratio. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is Kv in brushless motors?
A: Kv represents the motor's RPM per volt with no load. A 1000Kv motor would spin at 1000 RPM when 1V is applied with no load.

Q2: How does gear ratio affect performance?
A: Higher gear ratios reduce output speed but increase torque, while lower ratios increase speed but reduce torque.

Q3: Is this calculation accurate under load?
A: This calculates no-load RPM. Actual RPM under load will be lower due to efficiency losses and voltage drop.

Q4: Can I use this for motors running at different voltages?
A: This calculator is specifically for 12V systems. For other voltages, replace 12 with your actual voltage.

Q5: What's a typical Kv range for brushless motors?
A: Kv values typically range from a few hundred (for high-torque applications) to several thousand (for high-speed applications).