Poznámky redaktora
96 the whole operating range.
Energy regenerated from one section in
braking mode can directly used another
section via the bus without pow er
consum ption from the supply network.
Typically, the LSU used for applications
which only require two-quadrant operation. With
five sizes inverter modules available (3, 5,
7, and MVA), the optimum configuration
for specific application can reached by
com bining the odules with minimum
engineering effort.
The layout and equipment the INU and the
ARU are identical. controls the power
factor unity the whole operating
range even very low speeds. They are self-commutated,
6-pulse, 3-level voltage source inverters,
incorporating IGCT technology for
a reliable, fuseless operation with
a inimum num ber drive
com ponents.
Multidrive topologies with common bus
offer solution with optimum efficiency.
Line Supply Unit (LSU)
The Line Supply Unit (LSU), designed for
two-quadrant operation, maintains the power
factor 0.Common bus
The ACS 6000 modularity based the
common bus converter principle, where
several motors (synchronous and induction)
can connected the same bus. linking the modules
in parallel, the power can increased to
27 MVA.
A DC/ /
/ c
M) (M) (M
Diagram common bus principle
ACS 6000 modules
Active Rectifier Unit (ARU) Inverter
Unit (INU)
The Active Rectifier Unit (ARU) rectifies the AC
line voltage and charges the link capacitors
whereas the Inverter Unit (INU) inverts the
DC voltage the motor voltage.
P ctive (kW)
Available VAr 3000V) Available VAr 2700V)
ABB ACS 6000.
If short-term braking capability needed, a
Resistor Braking Unit with internal external
resistors can installed.
The ARU allows four-quadrant
operation for regenerative braking,
which reduces the overall energy
consumption.
O ptionally the ARU can be
dim ensioned com pensate
reactive power generated other
loads connected the same network
