Arranging Components For Converter Units - Siemens SINAMICS DCM Operating Instructions Manual
Control module for variable-speed dc drives
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6.1.3
Arranging components for converter units
Arranging components for converter units
①
②
③
④
⑤
Figure 6-8
CAUTION
When RFI suppression filters are being used, line reactors must always be used at the unit
input to decouple the TSE circuit.
The components must be wired in the following order:
Line supply – radio interference suppression filter – commutating reactor – power unit.
An incorrect arrangement can destroy a thyristor (short-circuit) and rupture a fuse.
Catalog LV60 is used for selecting line reactors.
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
The line reactor in the field circuit is dimensioned for the rated current of the motor field.
The line reactor in the armature circuit is dimensioned for the rated motor current in the
armature. The line current equals 0.82 times the DC current.
The RFI suppression filter for the armature circuit is dimensioned for the rated motor current in
the armature. The line current equals 0.82 times the DC current.
The RFI suppression filter for the field circuit is dimensioned for the motor field's rated current.
If the supply voltages for the armature circuit and field circuit are the same, the voltage for the
field can also be taken after the radio interference suppression filter for the armature circuit.
Arrangement of reactors and RFI suppression filters
6.1 Instructions for EMC-compliant drive installation
Connecting
63
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