Connecting
6.1 Instructions for EMC-compliant drive installation
SINAMICS DCM DC Converter
102
Operating Instructions, 12/2018, A5E34763375A
6.1.4
Arranging components for converter units
①
The line reactor in the field circuit is dimensioned for the rated current of the motor field.
②
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.
③
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.
④
The RFI suppression filter for the field circuit is dimensioned for the motor field's rated current.
⑤
If the supply supply voltage for the armature circuit and field circuit are the same, the supply
voltage for the field can also be taken after the radio interference suppression filter for the
armature circuit. In this case, the radio interference suppression filter must be dimensioned for
the sum of the rated armature current times 0.82 and the rated field current. The armature
circuit and field circuit must be separately protected.
<6> Devices with "Power interface with AC electronic power supply"
<7> Devices with "Power interface with DC electronic power supply"
All of the voltages are rated supply values. For tolerances, see Chapter "Unit data (Page 45)".
Figure 6-9
Arrangement of reactors and RFI suppression filters
NOTICE
Use of radio interference suppression filters
Whenever RFI suppression filters are used, line reactors are required between the filter and
device input for the purpose of decoupling the TSE circuit and providing protection for the
X capacitors.
An incorrect arrangement can destroy a thyristor (short-circuit) and rupture a fuse.
•
The components must be wired in the following order:
Line supply – radio interference suppression filter – commutating reactor – SINAMICS
DCM.
