Inverter Braking Resistor Calculation

Use drive power rating if unknown maximium torque typically 100 to 200 use 1 5 if unknown motor efficiency typically 0 8 to 0 98 use 0 95 if unknown.

Inverter braking resistor calculation.

Minimum resistance ohms. They will reduce the braking power proportionally and hence increase the stop times for any given load. Stop energy remember friction drag etc all work in your favour remember first of all to convert everything into the right units. How do you calculate the stopping energy put into a dynamic braking resistor.

Furthermore you need the brake power pbr and the minimum resistance value rmin which is defined by the vfd. Kinetic energy m v2 2 e g. Enter the minimum brake resistor ohms required by the inverter. Max resistance 0 ohms.

Man on bike 60kg man 20kg bike 15mph or 7m s. Brake resistor calculator instructions for use. Average braking power 0 w. Leave the watts entry blank or enter a value if you prefer to reduce the options.

Average braking power 0 w. Calculating braking resistor value r v dc switch on p peak ppeak motor power rating x maximum torque x efficiency motor power rating. Please note braking power is conservatively stated slightly overstated motor and drive efficiency is considered 100. Peak braking power 0 w.

To calculate the right size of the resistor you need the characteristic data of the load cycle. Ohms dc bus volts 2 peak power higher ohmic values can be used. The calculator will list the best combinations of resistors and connection arrangements. Brake time or duty cycle and the total cycle time.