Dynamic Braking - Siemens SINAMICS G120 Original Instructions Manual
Sinamics g120 inverter with cu230p-2 control
units
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
- Manual (732 pages) ,
- Operating instructions manual (550 pages)
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Setting functions
8.7 Application-specific functions
8.7.3.4
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 8-22
280
CAUTION
Simplified representation of dynamic braking with respect to time
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
.
DC link, max
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