Inverter Braking Resistor Calculation

The calculator will list the best combinations of resistors and connection arrangements.

Inverter braking resistor calculation.

Brake resistor calculator instructions for use. 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. Please note braking power is conservatively stated slightly overstated motor and drive efficiency is considered 100. Brake time or duty cycle and the total cycle time.

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

Man on bike 60kg man 20kg bike 15mph or 7m s. Furthermore you need the brake power pbr and the minimum resistance value rmin which is defined by the vfd. Minimum resistance ohms. Peak braking power 0 w.

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. Max resistance 0 ohms. Leave the watts entry blank or enter a value if you prefer to reduce the options. Kinetic energy m v2 2 e g.

Metres kilograms seconds and for rotational energy radians. To calculate the right size of the resistor you need the characteristic data of the load cycle. Average braking power 0 w. Due to production tolerance and temperature coefficient the recommended resistance value is significantly higher than the minimum resistance value.