3-6 (26) 2UEA001270 Rev. F ACS2000 User manual
Chapter 3 - Control system
Figure 3-5 Typical single-line drive system
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.
3.2.1.4 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.
Figure 3-6 DTC control platform
MV switchgear
ACS2000
Higher level
control system
Motor
Local drive on/off
control
Main power supply
M
MV switchgear
control interface
Motor
model
Speed
controller
Torque-
reference
controller
Switching
logic
Switch
positions
Voltage
Current
M
Torque
flux
comparator
Speed reference
Actual speed
Torque reference
or
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