VoltCheck24 Engineering Calculator

Servo Regeneration Energy and Braking Resistor Calculator

Calculate servo deceleration energy, DC-bus capacitor absorption, braking resistor power, and regeneration margin.

Open Interactive Calculator Open Load Inertia Calculator

How to use this calculator

Collect the values below from the equipment nameplate, data sheet, or field measurement.
Enter values using one consistent unit system and use worst-case operating conditions.
Review the result, margin, and engineering note before selecting hardware.
Cross-check the result with the related calculator and save the review for your project record.

Input checklist

Reflected inertia
Maximum speed
Deceleration time
DC bus voltage and capacitance

Example field question

Use this calculator when a design review or site issue requires a quick engineering check before a detailed manufacturer selection.

Common mistakes to avoid

Do not mix nominal values with measured worst-case values. Keep units consistent and include cable, temperature, duty, and derating assumptions where applicable.

Standards and validation

Review the result against local codes, IEC/NEC/NFPA/ISO practices when applicable, project specifications, and the latest manufacturer data sheet.

Recommended workflow

Start with the primary calculation, then use the related tool to check the next design dependency. Save or print the result only after the assumptions and worst-case conditions are confirmed.

Start with the primary inputs Check the related dependency

Formula and Inputs

Kinetic energy is estimated from reflected inertia and angular speed, then compared with the drive DC-bus absorption capacity.

Industrial Use Cases

Use this calculator for servo axes, indexing tables, conveyors, winders, hoists, and repeated high-speed deceleration.

Engineering Note

Check the servo drive manufacturer’s minimum resistance, peak power, continuous power, duty cycle, and thermal installation limits.

FAQ

Why is peak resistor power different from continuous power?

Deceleration energy may arrive in short pulses, while the resistor’s average thermal rating depends on repetition and duty cycle.

Can the drive capacitor absorb all regeneration energy?

Sometimes, but the result depends on bus voltage, capacitance, speed, inertia, and deceleration profile.

Preliminary engineering reference only. Confirm final selections against current standards, project specifications, and manufacturer data.