Firing Angle Example; Note; Status Indication For Bridge - ABB DCS 500B Description

Firing angle ex-
ample

Note.

Status Indication
for Bridge
DCS 500 Software Description
α
U
L1
0 30 60 90 120 150 180
Armature voltage controlled by firing angle 60 °
Figure 23
To avoid shooting through of the converter, the adjusted val-
ues of alpha limits should not be changed without consulting
ABB.
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.
Functional Software description
average voltage
output voltage
L2 L3
firing angle
t
main voltage
47