Kollmorgen MMC Smart Drive Series, Hardware Manual

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72 Kollmorgen - June 2014
MMC Smart Drive Hardware Manual
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SYSTEM POWER DEVICES
4.6 Line Filters
Line Filters consist of combinations of capacitors, reactors, resistors and voltage
limiters that are intended to reduce the electromagnetic influence of the environment.
4.6.1 Line Filters and CE Compliance
The direction of influence is bi-directional, i.e. there is a reaction in the units of
emission of conducted disturbances, and, at the same time, an improvement in the
immunity of the drive to interference that occurs in the case of lightning strikes, tripped
fuses, or simple switching activities.
•
The filter should be mounted to a grounded conductive surface.
•
The filter must be mounted close to the drive input terminals. If the distance
exceeds 2 feet (600 mm), then a shielded cable should be used to connect the
drive and filter, rather than a wire.
•
The wires connecting the AC source to the filter should be shielded from, or at
least separated from the wires (or strap) connecting the drive to the filter. If the
connections are not segregated from each other, then the EMI on the drive side of
the filter can couple over to the source side of the filter, thereby reducing, or elimi-
nating the filter effectiveness. The coupling mechanism can be radiation, or stray
capacitance between the wires.
Figure 4-12: Block Diagram Simplified for 3-Phase Line Filter
LINE FILTERS ON SMART DRIVE NEXTGEN (SDN)
DRIVES
MMC-SDN-XXXX drives do not require line filters
1L1
1L2
1L3
L1
L2
L3
PE
2L1
2L2
2L3
1U1
1V1
1W1
PE