Inverter Braking Resistor Calculation

They will reduce the braking power proportionally and hence increase the stop times for any given load.

Inverter braking resistor calculation.

Due to production tolerance and temperature coefficient the recommended resistance value is significantly higher than the minimum resistance value. Max resistance 0 ohms. Brake time or duty cycle and the total cycle time. Brake resistor calculator instructions for use.

How do you calculate the stopping energy put into a dynamic braking resistor. The minimum ohms are set by the drive manufacturer and will produce braking power at the peak rating of the drive or its braking module. Man on bike 60kg man 20kg bike 15mph or 7m s. Minimum resistance ohms.

Kinetic energy m v2 2 e g. To calculate the right size of the resistor you need the characteristic data of the load cycle. Stop energy remember friction drag etc all work in your favour remember first of all to convert everything into the right units. Ohms dc bus volts 2 peak power higher ohmic values can be used.

Furthermore you need the brake power pbr and the minimum resistance value rmin which is defined by the vfd. Please note braking power is conservatively stated slightly overstated motor and drive efficiency is considered 100. Average braking power 0 w. Enter the minimum brake resistor ohms required by the inverter.

Peak 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. Leave the watts entry blank or enter a value if you prefer to reduce the options. Average braking power 0 w.