Descriptions of functions
10.28 Connecting units in parallel and in series
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
615
Parameter assignment
The following parameters should be specifically set for operation with this converter
topology:
Table 10- 73 Parameter assignment, 6-pulse series connection
Parameter
Master
Units connected in parallel with
the master
p51798
Voltage at an uncontrolled rectifier Actual voltage as a percentage of
the voltage at the master
(standard: 85%)
The same as at the master
p51799
Operating principle
0
0
p51800
Position in the topology
35 (Master for diode rectifier)
33
p51802
Minimum number of nodes
Number of SINAMICS DCM units
in this topology
Number of SINAMICS DCM units
in this topology
p51807
Telegram failure time
0.0 s
0.1 s if units connected in parallel
are available
0.1 s
p50082
Field operating mode
≠
0
0 (no field)
p50076[..]
Reduction in rated unit DC current -
The same as at the master
p50078[..]
Rated value for supply voltage
-
The same as at the master
p50100
Rated motor current
Rated motor current/number of
SINAMICS DCM
The same as at the master
p50110
Armature resistance Ra
2)
Actual armature resistance ×
number of SINAMICS DCM
The same as at the master
p50111
Armature inductance La
2)
Actual armature inductance ×
number of SINAMICS DCM
The same as at the master
p51591
La reduction factor
2)
-
The same as at the master
2)
The optimization run for current controller and precontrol (p50051 = 23 or 25) sets the correct values for these
parameters.
