1. What is the KV To RPM Formula?

The KV to RPM formula calculates the rotational speed (RPM) of an electric motor based on its KV rating and applied voltage. KV rating represents the motor's RPM per volt with no load.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( KV \) — Motor KV rating (RPM per volt)
• \( Voltage \) — Applied voltage (V)

Explanation: This formula provides the theoretical maximum RPM of a brushless motor under no-load conditions.

3. Importance of RPM Calculation

Details: Accurate RPM calculation is crucial for motor selection, propeller matching, and performance prediction in RC vehicles, drones, and other electric motor applications.

4. Using the Calculator

Tips: Enter KV rating in RPM/V and voltage in volts. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What does KV rating mean?
A: KV rating indicates how many RPM the motor will turn per volt applied with no load. Higher KV means higher RPM but lower torque.

Q2: Is this the actual RPM under load?
A: No, this calculates theoretical no-load RPM. Actual RPM under load will be lower due to factors like propeller load and efficiency losses.

Q3: How accurate is this calculation?
A: It provides the theoretical maximum RPM. Real-world RPM will vary based on load, battery condition, and motor efficiency.

Q4: Can I use this for brushed motors?
A: While the concept is similar, brushed motors typically don't use KV ratings. This calculator is designed for brushless motors.

Q5: What affects actual motor performance?
A: Propeller size, battery quality, ESC performance, temperature, and mechanical efficiency all impact actual motor performance.