Siemens SINAMICS G120 Operating Instructions Manual page 129

Different electrical braking methods for different applications
Table 5- 49
Application examples
Pumps, fans, compressors,
extruders, mixers
Fans, grinding machines,
conveyor belts
Centrifuges, vertical conveyors,
hoisting gear, cranes, winders
Braking methods depending on the drive inverter being used
Table 5- 50
DC and compound braking
Dynamic braking
Regenerative braking
Advantages and disadvantages of the braking methods
● DC braking
● Compound braking
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
Braking methods and Power Modules depending on the application
Power Modules depending on the braking method
Advantage:
– The motor is braked without the inverter having to convert the braking
energy
Disadvantages:
– significant increase in the motor temperature; no defined braking
characteristics; no constant braking torque; no braking torque at standstill; braking
energy is lost as heat; does not function when the power fails
Advantage:
– Defined braking characteristics, the motor is braked without the inverter
having to convert any significant amount of braking energy
Disadvantages:
– no constant braking torque; excessive motor temperature rise; braking
energy is dissipated as heat; does not function when the power fails
Electrical braking method
Not necessary
DC braking, compound braking
Dynamic braking
Regenerative braking
SINAMICS G120 Power Module
PM240
X
X
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5.10 Technological functions
Power Modules that can be
used
PM240, PM250, PM260
PM240
PM240
PM250, PM260
PM250 PM260
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X
Functions
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X
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