ABB ACS800 Firmware Manual page 186

186
Index Name/Selection
26.04 IR STEP-UP FREQ
0...50 Hz
26.05 HEX FIELD WEAKEN Selects whether motor flux is controlled along a circular or a hexagonal pattern
OFF
ON
26.06 FLUX REF PTR
-255.255.31 ...
+255.255.31 / C.-
32768 ... C.32767
26.07 FS METHOD
OFF
ON
Actual signals and parameters
Description
Defines the frequency at which the step-up IR compensation reaches the
IR compensation used in Scalar control
A voltage boost is used in step-up applications to achieve higher break-away
torque. Since voltage cannot be fed to the transformer at 0 Hz, special IR
compensation is used in step-up applications. Full IR compensation starts
around slip frequency. The figure below illustrates the step-up
IR compensation.
U / U
N
(%)
100%
26.03 IR
COMPENSATION
26.04 IR STEP-UP
FREQ
For more information, see Sine Filters User's Manual for ACS800 Drives
[3AFE68389178 (English)].
Frequency
in the field weakening area of the frequency range (above 50/60 Hz). See
section Hexagonal motor flux
The rotating flux vector follows a circular pattern. Optimal selection in most
applications: Minimal losses at constant load. Maximal instantaneous torque is
not available in the field weakening range of the speed.
Motor flux follows a circular pattern below the field weakening point (typically
50 or 60 Hz) and a hexagonal pattern in the field weakening range. Optimal
selection in the applications that require maximal instantaneous torque in the
field weakening range of the speed. The losses at constant operation are
higher than with the selection NO.
Selects the source for the flux reference, or sets the flux reference value.
Parameter index or a constant value. See parameter
the difference. The range of the flux is 25 ... 140%. With constant value
settings 100% = C.10000. Typically there is no need to change this value.
Activates the flux correction at low frequencies, < 10% of nominal frequency,
when the torque exceeds 30%. Effective in the motoring and generating
modes.
Inactive
Active.
(26.03 IR COMPENSATION).
Field weakening
point (FWP)
on page 74.
10.04
FbEq
100 = 1
f (Hz)
0
65535
for information on 100 = 1%
0
1