Functions, monitoring, and protective functions
9.2 Drive functions
Converter cabinet units
488
Operating Instructions, 07/2016, A5E03347396A
Properties
●
Vdc control
–
Comprises Vdc_max control and Vdc_min control (kinetic buffering), which are
independent of each other.
–
Contains a joint PI controller. The dynamic factor is used to set Vdc_min and Vdc_max
control independently of each other.
●
Vdc_min control (kinetic buffering)
–
The kinetic energy of the motor is used for buffering the DC-link voltage in the event of
a momentary power failure, thereby delaying the drive.
●
Vdc_max control
–
Control momentary regenerative load without shutdown using "overvoltage in the DC
link".
–
Vdc_max control is only recommended for a supply without active closed-loop control
for the DC link and without feedback.
Description of Vdc_min control (kinetic buffering)
Figure 9-4
Switching Vdc_min control on/off (kinetic buffering)
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