1. What is the Voltage to RPM Calculation?

The Voltage to RPM calculation determines the rotational speed of a motor based on the applied voltage and the motor's kV rating (RPM per volt). This is essential for understanding motor performance in various applications.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Voltage \) — Applied voltage in volts (V)
• \( kV \) — Motor constant in RPM per volt (RPM/V)

Explanation: The kV rating indicates how many RPM the motor will turn per volt applied with no load. Multiplying by the actual voltage gives the theoretical maximum RPM.

3. Importance of RPM Calculation

Details: Knowing the expected RPM helps in selecting the right motor for applications, predicting performance, and ensuring the motor operates within safe limits.

4. Using the Calculator

Tips: Enter the voltage applied to the motor and the motor's kV rating. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Is this the actual RPM under load?
A: No, this is the theoretical no-load RPM. Actual RPM under load will be lower due to factors like efficiency and torque requirements.

Q2: How do I find my motor's kV rating?
A: The kV rating is typically specified by the manufacturer in the motor's documentation or product specifications.

Q3: Can I use this for any type of motor?
A: This calculation is primarily for brushless DC motors that specify a kV rating. It doesn't apply to brushed motors or AC induction motors.

Q4: Why is my actual RPM lower than calculated?
A: Voltage drop in wiring, battery condition, motor efficiency, and mechanical load all reduce actual RPM below the theoretical maximum.

Q5: How accurate is this calculation?
A: The calculation is mathematically precise for the given inputs, but real-world factors will affect actual motor performance.