Keba ServoOne User Manual

7.7.1Variant1(Table)
l Deactivatetable:P 340[0] - CON_FM_Imag=0
l SelectP 435[0] - CON_FM_FWMode=TABLE(1)
l Run-upslowlytorequiredspeeds
l Setscope:Isdref/sqrt(2)*Imag=%=field-weakeningspeed.Themaximum
amountofthefield-weakeningd-currentisdefinedbyparameterP 340[0] -
CON_FM_Imag(specificationofeffectivevalue).
l Enterthevaluesinthetable;P 342[0] - CON_FM_SpeedTab
Example
The speeds in P342[0] - CON_FM_SpeedTab must continuously increase
from index 0 -7.
Index
P 348
Rated
speed;
P 340
I
mag
rms
P 342 (0-7) Field-
weakening speed
[%]
P 343 (0-7)Magnetizing current
in field-weakening mode in [%]
(0)
I
rated
=
1800 rpm
I
mag rms
=
100%
100 0
(1) 110 55
(2) 120 70
(3) 130 90
(4) 140 100
(5) 150 100
(6) 160 100
(7) 170 100
Table 7.27: Example of speeds in P342-CON_FM_SpeedTab
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
150
7 Control
7.7.2Variant2(Calc)
In the case of very rapid speed or load changes in the field-weakening range, the
setting P435[0] - CON_FM_FwMode = CALC(2) must be selected. A characteristic
for higher control dynamism is calculated internally.
Features
l Veryfastadaptations,withhighdynamism,arepossible(open-loopcontrol
method).
l Motorparametersmustbeknownquiteprecisely.
l Ifcontinuousoscillationoccurs(voltagelimit)thepresetnegatived-current
valueisthennotsufficient.Scalingparameter
P 436[0] - CON_FW_SpeedScale>100%isusedtoevaluatethemapat
higherspeeds.
The voltage controller overlaid over the map (setting as described in variant 1).
The set combination of voltage controller and map entails more commissioning
commitment, but it enables the best stationary behaviour (highest torque relative to
current) and the best dynamic response to be achieved.

ID Index Name / Setting Unit Function
435 0 CON_FM_FWMode  Selectionmodeforfield-weakeningof
synchronousmotors
  NONE(0)=Field
weakeningdisabled
 Field-weakeningisoff,regardlessofother
settings.
  TABLE(1)=IsdsetbyPI
controllerandtable
parameter
 Field-weakeningiseffectedbyacharacteristic
whichspecifiesthed-current(P 343[0] - CON_
FM_ImagTab)dependentonthespeed(P 342
[0] - CON_FM_SpeedTab).
  CALC(2)=IsdsetbyPI
controllerandtable
parameter
 Field-weakeningiseffectedbywayofa
characteristicwhichissetinternallyviathe
Table 7.28: Parameters for selecting field weakening

Keba ServoOne Specifications

General

Brand	Keba
Model	ServoOne
Category	Controller
Language	English