Functions
9.9 Application-specific functions
Main features of the braking functions
DC braking
The motor converts the regenerative power into
heat.
Compound braking
The motor converts the regenerative power into
heat.
Dynamic braking
The inverter converts the regenerative
power into heat using a braking resistor.
Table 9- 36
Application examples
Pumps, fans, mixers, compressors, extruders
Grinding machines, conveyor belts
Centrifuges, vertical conveyors, hoisting gear, cranes, winders
206
Advantage:
The motor brakes without the
inverter having to process the regenerative
energy
Disadvantages:
significant increase in the
motor temperature; no defined braking
characteristics; no constant braking torque; no
braking torque at standstill; regenerative
power is lost as heat; does not function when
the line supply fails
Advantage:
Defined braking characteristics,
the motor brakes without the inverter having to
convert any regenerative energy
Disadvantages:
significant motor temperature
rise; no constant braking torque; regenerative
power is dissipated as heat; does not function
when the line supply fails
Advantages:
defined braking
characteristics; no additional motor
temperature increase; constant
braking torque; in principle, also
functions when the power fails
Disadvantages:
Braking resistor
required; regenerative power is
dissipated as heat
What braking method is suitable for what application?
Electrical braking methods
Not required
DC braking, compound braking
Dynamic braking
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB