Motor KV Calculator
Calculate the KV rating of your brushless DC motor
Motor KV Calculator
Essential for motor selection and performance prediction
Results:
Motor KV (RPM/V): 0.00
How to Use the Calculator
Calculate Motor KV
- Enter the motor's RPM (Revolutions Per Minute).
- Enter the operating Voltage (V).
- Click "Calculate" to find the motor's KV rating.
Understanding KV
- KV is the motor's velocity constant.
- It indicates how many RPM the motor will turn per volt applied.
- Higher KV motors generally spin faster at a given voltage.
Applications
- Used in RC vehicles, drones, and electric propulsion systems.
- Helps in matching motor to propeller/load for optimal performance.
- Crucial for battery and ESC (Electronic Speed Controller) selection.
Motor KV Fundamentals
What is Motor KV?
Motor KV (often written as Kv) is a constant that defines the theoretical no-load RPM of a brushless DC motor per volt applied to its terminals. It's a crucial parameter for selecting the right motor for a specific application.
- Higher KV: Faster motor, lower torque.
- Lower KV: Slower motor, higher torque.
Importance of KV
- Helps in predicting motor speed with a given battery voltage.
- Essential for propeller sizing in drones and RC planes.
- Influences current draw and overall system efficiency.
Key Formula:
KV = RPM / Voltage
Calculation Formulas
Motor KV:
KV = RPM / Voltage
Example Calculation
Consider a motor operating at:
RPM: 10000
Voltage: 12V
KV = 10000 RPM / 12 V = 833.33 RPM/V
Motor KV = 833.33 RPM/V
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