This calculator determines the required ohmic value and power rating for a Dynamic Braking Resistor (DBR) in a Variable Frequency Drive (VFD) application. It uses motor rating (HP or kW), AC line voltage, duty cycle, maximum torque, motor efficiency, and drive efficiency to size the DBR for safe dissipation of regenerative energy during motor braking. Always consult VFD manufacturer specifications to verify resistance limits and application suitability.