24
Unidrive M Modular Installation Guide
Issue Number: 2
Figure 4-6 Layout for two or more Unidrive M 9D or 10D modules operating on a 3-phase AC supply
L3
L2
L1
Master
Follower
INLXXX
Line reactor
INLXXX
Line reactor
+DC
+DC
-DC
-DC
Comms
Comms
24 V
24 V
0 V
0 V
Fuses
Fuses
OTLXXX
sharing
chokes
U
V
W
U V W
OTLXXX
sharing
Parallelling cable
chokes
9D 10D
9D 10D
Current sharing between drives
whose motor outputs are
connected in parallel
When used from a 3 phase supply, it is
preferable not to link the DC bus
because the impedance between DC
and each inverter output is just the
impedance of the output chokes. Also,
on the input side, input current sharing
is determined only by making the
temperature of the two rectifiers similar
and by ensuring that both rectifiers see
the same impedance to the line power
supply.
Summary of Contents for 09201760D
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