Dc Braking - Siemens SINAMICS G120 Operating Instructions Manual

Braking with regenerative feedback into the line supply
The inverter feeds electrical energy back into the line supply
(energy recovery).
Advantages:
•
not completely converted into heat, but regenerated into the
line supply; is suitable for all applications; continuous
regenerative operation is possible - e.g. when lowering a
suspended load
Disadvantage:
•
Which Power Module permits which braking technique?
Electrical braking methods
DC braking, compound braking
Dynamic braking
Braking with regenerative feedback into the line sup-
ply
6.7.3.1

DC braking

DC braking is used for applications without regenerative feedback into the line supply, where
the motor can be more quickly braked by impressing a DC current than along a braking
ramp.
Typical applications for DC braking include:
● Centrifuges
● Saws
● Grinding machines
● Conveyor belts
Function
NOTICE
Motor damage caused by overheating
The motor can overheat if it is braked for long periods of time or frequently using DC
braking. This may damage the motor.
• Monitor the motor temperature.
• If the motor gets too hot during operation you must select another braking method or
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB
Constant braking torque; the braking energy is
Does not function for a power failure
give the motor more time to cool down.
Advanced commissioning
6.7 Application-specific functions
Power Modules that can be used
PM240, PM330
PM240, PM330
PM250, PM260
249