Program features
73
Scalar control
It is possible to select Scalar control as the motor control method instead of Direct
torque control (DTC). In the Scalar control mode, the drive is controlled with a
frequency reference. The outstanding performance of the default motor control
method, Direct torque control, is not achieved in Scalar control.
It is recommended to activate the Scalar control mode in the following special
applications:
• In multimotor drives: 1) if the load is not equally shared between the motors, 2) if
the motors are of different sizes, or 3) if the motors are going to be changed after
the motor identification
• If the nominal current of the motor is less than 1/6 of the nominal output current of
the drive
• If the drive is used without a motor connected (for example, for test purposes)
• The drive runs a medium voltage motor via a step-up transformer.
In the Scalar control mode, some standard features are not available.
Settings
Parameter
.
IR compensation for a scalar-controlled drive
IR compensation is active only when the motor
control mode is Scalar (see section
on page
. When IR compensation is activated,
the drive gives an extra voltage boost to the
motor at low speeds. IR compensation is useful in
applications that require high breakaway torque.
In Direct torque control, no IR compensation is
possible/needed.
Settings
Parameter
.
f
(Hz)
Motor Voltage
No compensation
IR compensation
Содержание ACS 800 Series
Страница 1: ...ACS800 Firmware Manual Crane Control Program N697 ...
Страница 4: ......
Страница 26: ...Start up and control through the I O interface 26 ...
Страница 36: ...Quick start up guide 36 ...
Страница 52: ...Control panel 52 ...
Страница 105: ...Program features 105 Figure Control diagram for Shaft synchronisation executed in 20 ms ...
Страница 126: ...Program features 126 The figures below show speed limits according to different load conditions ...
Страница 128: ...Program features 128 ...
Страница 150: ...Application macros control location EXT1 EXT2 150 ...
Страница 228: ...Actual signals and parameters 228 ...
Страница 299: ...Adaptive Programming examples for crane control 299 ...
Страница 305: ...Adaptive Programming examples for crane control 305 ...
Страница 312: ...Adaptive Programming examples for crane control 312 The following figures show the previous example enlarged ...
Страница 314: ...Adaptive Programming examples for crane control 314 The following figures show the previous example enlarged ...
Страница 318: ...Analogue Extension Module 318 ...
Страница 332: ...Additional data actual signals and parameters 332 ...
Страница 333: ...DriveWindow 333 DriveWindow DriveWindow connected to the ACS800 RMIO RDCO board and channel CH3 ...
Страница 334: ...DriveWindow 334 ...
Страница 335: ...Control block diagrams 335 Control block diagrams ...
Страница 336: ...Control block diagrams 336 ...
Страница 337: ...Control block diagrams 337 ...
Страница 338: ...Control block diagrams 338 ...
Страница 340: ...www abb com drives www abb com drivespartners Contact us 3AFE68775230 Rev E EN 2012 09 25 ...