ABB ACA 6 Series Hardware Manual page 22

Chapter 1 – Introduction
Frame Size R12i
Common DC bus
+
U
c
-
1-10
Frame R12i contains three phase modules, each producing one of the
three phases driving the motor. Each phase module consists of three
parallel connected power plates. Six IGBTs with free wheeling diodes
are integrated to a single power plate. The figure below shows the
connection of one phase.
P2 P3
P1
P2
P1 P3
P2 P3
P1
ACS 600 MultiDrive Hardware Manual
Power Plate
Phase Module
W phase
3 ~
V phase
M
U phase