Chapter 3 – Hardware Description
3-4
ACA 635 IGBT Supply Sections
Main Circuit
Construction
The converter consists of six insulated gate bipolar transistors (IGBT)
with free wheeling diodes and DC capacitors. Frames R8i and R9i are
equipped with parallel connected IGBTs for each phase located on
three power plates. Frames R10i and R11i include six power plates
and frame R12i nine power plates. An a.c. choke is connected between
the supply transformer and the converter. The AC choke impedance is
20 percent of the nominal impedance of the ISU.
Configurations
The sections below describe possible configurations of ISU modules.
Basic Configuration
The hardware of the IGBT supply unit is equal to the hardware of the
ACS 600 MultiDrive inverter. One NAMC board controls the converter
module. It is located in the Auxiliary Control Unit inside the Drive
Control Unit (NDCU) box as well as the NIOC board. The supply
section is equipped with an a.c. reactor and AC and DC fuses.
Parallel Connected
Modules
Parallel connected IGBT supply converter module configuration is
equal to parallel connected inverter module configuration of the
ACS 600 MultiDrive. One NAMC board controls all parallel connected
modules. Each module is equipped with an a.c. reactor and AC and DC
fuses. If one module fails, it can be disconnected by removing the
fuses on both sides of it. The whole supply has a common
disconnecting device. Full redundancy is not possible. The modules
cannot supply the DC link separately, with independent NAMC boards.
Converter
Module
AC fuses
DC fuses
NAMC
~
=
ISU
ICU
FIU
NDCU
(230/115 V)
Charging circuit
ACU
(230/115 V)
Summary of Contents for ACS 600 MultiDrive
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