12-pulse parallel connection
3.3 Commissioning
12-pulse applications
Compact User Manual, 09/2015, A5E34871844H
25
Optimization for 2 individual reactors
Perform the optimization run for the armature current control (p50051 = 25).
During this optimization run, the firing angle is shifted in the Alpha-G direction until either
90% of the rated motor current is reached or until the rated device current (r50072[1]) is
reached, depending on which case occurs first.
The optimization run for the armature current closed-loop control (p50051 = 25) sets the
following parameters on the master converter:
Actual armature resistance × half the
p50111 Armature induct-
ance La
Actual armature inductance × half the
number of SINAMICS DCMs
The same as at the mas-
ter
p51591 La reduction factor - The same as at the mas-
p51596 Reactor resistance
Actual reactor resistance × half the
Actual reactor inductance × half the
p51595 L reduction factor - The same as at the mas-
- The same as at the mas-
- The same as at the mas-
In many cases, the optimization run is missing the criteria for the correct distribution of the
total inductance between the armature inductance and the inductance of the smoothing
reactors, especially if the two inductances differ considerably. This is why it is recommended
that these parameters are always checked and, if necessary, set manually to the correct
values.
In cases such as these, frequently fault message F60051 is output with fault value 50111, as
well as a negative value in r50047[1].
In this case, proceed as described in Chapter Optimization for an interphase transformer
(Page 26).
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