03 POWER ELECTRONICS AND CABINET FEATURES
3BHS212794 E01 REV M ACS6000 USER MANUAL 54/278
Figure 3-3 ARU/INU block diagram
Figure 3-4 ARU/INU circuit diagram
(1) ARU
(2) DC-link
(3) INU
(4) Motor
(1) EMC filter
(2) Phase modules
(3) Clamping circuit
Table 3-1 Main components in an ARU/INU cabinet
Component Description
Phase module Consists of integrated gate-commutated
thyristors (IGCTs), diodes and clamp capacitors.
The phase modules are identical in construction
for all power ratings. However, the types of
semiconductors vary depending on the power
rating. For this reason, it is not possible to mix
phase modules for different power ratings in one
unit.
Clamping circuit Protects the circuit from excessive rises in current
with di/dt reactors and freewheeling diodes.
Electromagnetic
compatibility (EMC) filter
Protects the transformer from excessive
voltage slopes
1 2 3
4
DC (+)
DC (NP)
DC (-)
L1
L2
L3
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