Siemens SINAMICS DCM Manual page 573

Descriptions of functions
10.27 Connecting units in parallel and in series
10.27.3 6-pulse series connection
Topology
The following diagram shows the topology of a 6-pulse series connection of two SINAMICS
DCM.
Figure 10-82 6-pulse series connection (1)
The following diagram shows the topology of a 6-pulse series connection, where additional
converters are connected in parallel to each of the two 6-pulse converters connected in
series.
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Operating Instructions, 02.2015, A5E34763375/RS-AA/001
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SINAMICS DCM DC Converter