Inverter Braking Resistor Calculation

Please note braking power is conservatively stated slightly overstated motor and drive efficiency is considered 100.

Inverter braking resistor calculation.

Metres kilograms seconds and for rotational energy radians. Man on bike 60kg man 20kg bike 15mph or 7m s. Leave the watts entry blank or enter a value if you prefer to reduce the options. The calculator will list the best combinations of resistors and connection arrangements.

Due to production tolerance and temperature coefficient the recommended resistance value is significantly higher than the minimum resistance value. Average braking power 0 w. Brake resistor calculator instructions for use. Max resistance 0 ohms.

Peak braking power 0 w. Ohms dc bus volts 2 peak power higher ohmic values can be used. 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.

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. Kinetic energy m v2 2 e g. How do you calculate the stopping energy put into a dynamic braking resistor. Brake time or duty cycle and the total cycle time.

Calculating braking resistor value r v dc switch on p peak ppeak motor power rating x maximum torque x efficiency motor power rating. Minimum resistance ohms. 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. Average braking power 0 w.