Kollmorgen Digital MMC Control, Hardware Manual

Page: 66 / 322

64 Kollmorgen - December 2011
MMC Smart Drive Hardware Manual
-
SYSTEM POWER DEVICES
•
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
1L1
1L2
1L3
L1
L2
L3
PE
2L1
2L2
2L3
1U1
1V1
1W1
PE