Dynamic Braking - Siemens SINAMICS G120C Operating Instructions Manual
Low voltage inverter
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Also See for SINAMICS G120C:
- Operating instructions manual (478 pages) ,
- Compact operating instructions (92 pages) ,
- Getting started (68 pages)
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Advanced commissioning
6.7 Application-specific functions
6.7.3.3
Dynamic braking
Typical applications for dynamic braking include:
● Horizontal conveyors
● Vertical and inclined conveyors
● Hoisting gear
For these applications, dynamic motor behavior with different speeds or continuous change
of direction is required.
Principle of operation
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
Figure 6-41
236
CAUTION
Simplified representation of dynamic braking with respect to time
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
.
DC link, max
SINAMICS G120C converter
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