NOTICE
Overheating of the motor due to compound braking
The motor will overheat if you use compound braking too frequently or for too long. This may
damage the motor.
• Monitor the motor temperature.
• Allow the motor to adequately cool down between braking operations.
• If necessary, select another motor braking method.
Parameter
Table 8-67 Setting and enabling compound braking
Parameter Description Factory setting
r1282 Vdc_max controller switch-on level (U/f) - V
p3856[D] Compound braking current (%) 0%
r3859.0 CO/BO: Compound braking/equal quantity control status word -
8.21.4 Dynamic braking
Overview
Dynamic braking processes the regenerative power that occurs during braking of the motor. In
this way, the converter can accelerate and brake the motor with the same dynamic response.
The following are typical applications for dynamic braking:
• Centrifuge
• Horizontal conveyors
• Vertical and inclined conveyors
• Hoisting gear
Advanced commissioning
8.21î™ Electrically braking the motor
SINAMICS G120C Converters
332 Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
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