Optimization For 2 Individual Reactors - Siemens SINAMICS DCM Compact User Manual

3.3.4.1

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:
Parameter
p50110
p50111
p51591
p51596
p51594
p51595
p50155
p50156
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).
12-pulse applications
Compact User Manual, 09/2015, A5E34871844H
Master
Armature re- Actual armature resistance × half the
sistance Ra number of SINAMICS DCMs
Armature induct- Actual armature inductance × half the
ance La number of SINAMICS DCMs
La reduction factor -
Reactor resistance Actual reactor resistance × half the
R number of SINAMICS DCMs
Smoothing induct- Actual reactor inductance × half the
ance L number of SINAMICS DCMs
L reduction factor -
Kp armature cur- -
rent controller
Tn armature cur- -
rent controller
12-pulse parallel connection
3.3 Commissioning
Slave or parallel units
The same as at the mas-
ter
The same as at the mas-
ter
The same as at the mas-
ter
The same as at the mas-
ter
The same as at the mas-
ter
The same as at the mas-
ter
The same as at the mas-
ter
The same as at the mas-
ter
25