ABB ACS2000 User Manual page 42

WARNING
42 A C S 2 0 0 0 , 4 K V U S E R M A N U A L
CAUTION
Notice: The ACS2000 must have exclusive control
NOTICE
of closing the MV switchgear. Uncontrolled closing
of the switchgear may cause damage to the drive.
—
See Appendix G - MV switchgear guide for control
44
Typical single-line
details. ACS2000 supplied with the optional
drive system
integral input contactor disconnect has this
—
switching integral to the drive. See Appendix
45
P for details.
DTC control platform
Main power supply
MV switchgear
—
44
The switchgear disconnects the power supply
when required by the process or when a fault
occurs. Examples of switchgear compatible with
the ACS2000 are MV circuit breakers, fused
vacuum contactors or motor control centers.
On drives equipped with the integral input
contactor disconnect option, the MV switchgear
is integrated within the drive.
See Appendix G - MV switchgear guide, located
on the CD, for further information.
See Appendix P - Integral Input Contactor
Disconnect, located on the CD, for further
information on drives with this option.
Speed and torque control
The speed and torque of the motor is controlled by
DTC (Direct Torque Control). The DTC motor control
platform, unique to ABB, provides accurate speed
and torque control with high dynamic speed
response. DTC is implemented on the AMC
circuit board of the INU.
Torque
reference
or
Speed
reference
Actual
speed
—
45
ACS2000
Motor
M
Motor
model
Torque flux
Speed Torque
comparator
controller reference
controller
Switching of the semiconductors in the INU is
directly controlled in accordance with the motor
flux and torque.
The measured motor currents and DC link voltages
are inputs to an adaptive motor model. The model
produces estimated values of torque and flux
every 25 microseconds. Motor torque and flux
comparators compare the actual values to
reference values which are produced by the
torque and flux reference controllers.
MV switchgear
Depending on the outputs from the hysteresis
control interface
controllers, the switching logic directly
determines the optimum switch positions
Higher level
control system
every 50 microseconds and initiates
Local drive
switching whenever required.
on/off control
Peripheral I/O devices
The peripheral input and output devices connected
to the AMC circuit board of the INU include:
Local CDP control panel
IOEC I/O system for parallel
signal transfer to external
devices
Optional fieldbus adapters
for data transfer to a higher-
level control system
Pulse encoder
Motor temperature
supervision
PC-based service tools
Switching
logic
Switch
positions
Voltage
current
See section Local control
panel and Chapter CDP
control panel
See section Interface system
See section Fieldbus
communication interfaces -
optional
See section Pulse encoder
(option)
See section Motor
temperature supervision
DriveWare® software tools -
includes software tools such
as the commissioning and
maintenance tools
DriveWindow and
DriveDebug, and DriveOPC
for data transfer between
ABB drives and Windows®-
based applications
DriveMonitorTM (Option) - a
monitoring and diagnostics
tool that allows access to the
drive from any location in the
world via a secure internet
connection.