Functional Software description
DCS 500 Software Description
47
Firing angle ex-
ample
L1 L2 L3
t
U
output voltage
main voltage
firing angle
average voltage
0 30 60 90 120 150 180
α
Figure 23
Armature voltage controlled by firing angle 60
°
Note.
To avoid shooting through of the converter, the adjusted val-
ues of alpha limits should not be changed without consulting
ABB.
Status Indication
for Bridge
Output connection point
ARM DIR (10402)
from the firing unit indi-
cates the bridge in use:
0
= no bridge,
1
= motor bridge,
-1
= generator bridge.
Values of the
U MOTN V (501)
,
I MOTN A (502)
and
U SUPPLY
(507)
must be given to the program, because these parameters are
used for scaling the actual values of e.g. armature current.
Summary of Contents for DCS 500B
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