Siemens SINAMICS G120 Operating Instructions Manual page 268

Setting functions
8.7 Application-specific functions
Dynamic braking
The inverter converts the regenerative power into
heat using a braking resistor.
Advantages:
•
no additional motor temperature increase;
constant braking torque; in principle, also
functions when the power fails
Disadvantages:
•
regenerative power is dissipated as heat
Braking with regenerative feedback into the line
supply
The inverter feeds the regenerative power back
into the line supply.
Advantages:
•
regenerative power is not converted into heat,
but regenerated into the line supply; can be
used in all applications; continuous
regenerative operation is possible - e.g. when
lowering a suspended load
Disadvantage:
•
fails
What braking method is suitable for what application?
Application examples
Pumps, fans, mixers,
compressors, extruders
Grinding machines, conveyor
belts
Centrifuges, vertical conveyors,
hoisting gear, cranes, winders
268
defined braking characteristics;
braking resistor required;
Constant braking torque; the
Does not function when power
Electrical braking methods
Not required
DC braking, compound braking
Dynamic braking
Braking with regenerative feedback
into the line supply
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
Power Modules that can be
used
PM240, PM340, PM250,
PM260
PM240, PM340
PM240, PM340
PM250, PM260