Vdc Control - Siemens SINAMICS S120 Function Manual
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- Function manual (982 pages) ,
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6.5
Vdc control
The "Vdc control" function can be activated using the appropriate measures if an overvoltage
or undervoltage is present in the DC link.
Figure 6-7
V
V/f
dc control
Undervoltage in the DC link
● Typical cause:
Failure of the supply voltage or supply for the DC link.
● Remedy:
Specify a regenerative torque for the rotating drive to compensate the existing losses,
thereby stabilizing the voltage in the DC link (kinetic buffering).
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
V/f control (vector control)
6.5 Vdc control
307
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