12-pulse bridge configuration can imple
mented with the unit supplied three-winding
transformer with thirty degree phase shift between
secondary windings.
■
Each inverter has Drive Control Unit (DCU) which
contains the RMIO Board and optional I/O modules.3.
Diode Supply Unit (DSU)
A Diode Supply Unit used non-regenerative drive
systems convert three-phase voltage DC
voltage. Other optional features
include the prevention unexpected start-up for the
inverters provide safe interlock for the system.
Several different I/O extension modules for different
functions such control, monitoring and measurement
purposes are available. However, an
optional fuse switch with capacitor charging device
can selected disconnect the whole drive unit. separate pulse encoder inter
face module also possible.
ACU
Supply Unit
ICU DCU/TSU/ISU
Drive Unit(s)
6 3AFE 68248531 REV 31.Overview the construction
An ABB multidrive made several different
units (see figure below). These sections are called
multidrive units and the most important units are:
■ drive units
■ diode supply units
■ IGBT supply units
■ thyristor supply units
■ dynamic braking units
■ control units (optional)
Drive Units
Inverters have built-in capacitors for smoothing the
voltage the busbars.
. . The electrical connection to
the common busbar fuse protected.2004
