Braking Resistor Calculator | Braking Resistor Calculation For VFD’S

Braking Resistance Calculator

Choosing the correct braking resistor for your VFD or inverter is critical for safe, efficient operation.
An undersized resistor can cause drive faults, overheating, and expensive downtime.

Our free braking resistor for vfd calculation helps you quickly determine the minimum Ohm and Wattage rating needed for your motor and application.

No registration required — instant results.

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How to Use the Braking Resistor Calculator

• Enter your motor’s rated power (in kW).
• Select your motor voltage (230V, 400V, 415V, or 480V).
• Choose your load type (Light, Medium, or Heavy).
• Enter your desired stopping time (seconds).
• Click Calculate to get your recommended braking resistor sizing!

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Why Correct Braking Resistor Sizing Matters

• Prevent VFD overcurrent and drive trips
• Protect motors during fast stops or regenerative braking
• Ensure safe braking on heavy load systems
• Extend the lifespan of your inverter drive

Incorrect resistor sizing can cause major issues — it’s always better to calculate and check before installation.

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Typical Applications Where Braking Resistors Are Critical

• Cranes and Hoists
• Elevators
• Heavy Conveyor Systems
• Centrifugal Equipment
• Winders and Unwinders

If your application involves heavy loads or fast stopping, a braking resistor is usually required.

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