Siemens Sinamics G110M Operating Instructions Manual page 258

Advanced commissioning
6.18 Elektrically braking the motor
Principle of operation
The DC link voltage increases as soon as the motor supplies regenerative power to the
inverter when braking. The regenerative power means that the DC link voltage in the inverter
increases. Depending on the DC link voltage, the inverter outputs the regenerative power to
the braking resistor through the braking chopper. The braking resistor converts the
regenerative power into heat, therefore preventing DC link voltages > Vdc_max.
Figure 6-57
258
Simplified representation of dynamic braking with respect to time
Distributed converter for SIMOGEAR geared motors
Operating Instructions, 09/2017, FW V4.7.9, A5E31298649B AH