Functions
8.9 Application-specific functions
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD
221
For these applications, dynamic motor behavior with different speeds or continuous change
of direction is required.
Burns when touching a hot braking resistor
A braking resistor reaches high temperatures during operation. Touching the braking
resistor may result in burns.
• Do not touch a braking resistor during operation.
The inverter controls the braking chopper depending on its DC-link voltage. The DC-link
voltage increases as soon as the inverter absorbs the regenerative power when braking the
motor. The braking chopper converts this power into heat in the braking resistor. This
prevents the DC-link voltage from increasing above the limit value U
DC link, max
.
Figure 8-28 Simplified representation of dynamic braking with respect to time
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