Programmable Multi-Axis Servo Drive Power Supply Unit Operation Manual
ID no.: CA97556-001 Date: 03/2015
moog
55
Commissioning
4.2.7
Setting DC link capacity
6.
The settings of the DC voltage controller depend on the DC link capacity of the complete multi-
axis system. You will find the DC link capacities under "Technical data" in the appendix to the
operation manuals of the Power Supply Unit and the Multi-Axis Servo Drives.
y
Add together the DC link capacities of all the drives connected to the multi-axis
system.
y
Set the overall value of DC link capacity
P-1500
(in µF).
ATTENTION!
The maximum overall capacity of the multi-axis system DC link for a
Power Supply Unit size 5 (incl.) must not exceed 10,000 µF,
for size 6A (incl.) 20,000 µF.
y
Set the relative controller dynamics
P-0405
of the voltage controller.
Recommended value: 100 %.
NOTE:
Parameter
P-0405
must in all cases be activated by double-clicking in the
"Value" field and confirming by pressing "Enter", even if you do not make any
changes. Otherwise the voltage controller will not be designed automatically.
Figure 4.4 Parameter editor - parameters
P-0405
and
P-1500
!
4.2.6
Automatic identification of DC link capacity and equivalent
time constant of current control
5.
The DC voltage controller of the Power Supply Unit regulates DC link voltage to an internally
preset fixed value. Control depends on the DC link capacity of the multi-axis system and the
equivalent time constant of current control. Both values can and should be determined by
automatic identification first.
ATTENTION!
The maximum overall capacity of the multi-axis system DC link for a
Power Supply Unit size 5 (incl.) must not exceed 10,000 µF,
for size 6A (incl.) 20,000 µF.
y
Before starting automatic identification, set the specified value for DC link
voltage to 700 V
DC
under parameter
P-0410
"CON_VCON_VdcRef"
.
y
Start automatic identification by setting parameter
P-1501
"SCD_AT_VdcCAP_Con"
to START(2).
As soon as the parameter switches to the value READY(0), the identification process is
complete.
The values determined for total DC link capacity (
P-1500
) and the equivalent time
constant for current control (
P-0406
) are now available for designing the DC voltage
controller.
NOTE:
In the next step, the value determined for total DC link capacity (
P-1500
)
section 4.2.7, p. 55 should be checked for plausibility and, if necessary,
replaced with the known value. The specified value for DC link voltage
(
P-0410
) section 4.2.8, p. 56 should likewise be set.
!
