gefran ADV200 Functions Description And Parameters List page 94

close to or equal to the actual mains value, Voltage margin represents the margin allowable by the voltage
regulation to perform rapid current variations when load steps are suddenly applied.
A value of 5% allows a very fast response to load steps but with a loss of output voltage and thus power output
(reduced power output).
The minimum value (1%) allows a maximum output voltage (around 98%) of the mains voltage to be achieved
but with loss of quality of the dynamic response.
Menu PAR Description
19.13 2300 Minimum speed OL
Setting of the minimum speed threshold in the Flux vector OL control mode. Below this limit the sensorless
regulator is disabled.
Menu PAR Description
19.14 2302 Min speed delay OL
Setting of the delay for disabling the sensorless regulator.
Menu PAR Description
19.15 2304 Speed filter OL
Setting of the time constant for the estimated speed in Flux vector OL mode. By increasing this parameter it
is possible to reduce the level of disturbance of the estimated speed, but the speed control dynamics are also
lowered.
Menu PAR Description
19.16 2306 Flux observe gain OL
Proportional gain of the internal flux observer in the open-loop flux vector control mode.
In case of instability, try changing the value and setting half or twice the default value.
Menu PAR Description
19.17 2308 OverFlux perc
The value is expressed as the percentage in excess of the rated flux.
OverFlux perc (%)
PAR 2308
120%
100%
Menu PAR Description
19.18 2310 Flux weakening OL
Enables or disables flux reduction in the open-loop flux vector control mode.
If set to Disable, the flux is not reduced when the speed of the motor exceeds the nominal speed. This results
in loss of control and instability.
To prevent this problem, set the parameter to Enable.
In the open-loop mode a flux value of less than the nominal speed of the motor is advantageous in terms of
94
UM Type
rpm INT16
UM Type
ms UINT16
UM Type
ms FLOAT
UM Type
FLOAT
UM Type
perc FLOAT
80%
200 400
UM Type
ENUM
FB BIT Def
30
FB BIT Def
200
FB BIT Def
5.0
FB BIT Def
250.0
FB BIT Def
100.0
Flux step
PAR 2314
600 800 1000
FB BIT Def
Enable
Min Max
0 CALCI
Min Max
0 5000
Min Max
0.1 20.0
Min Max
10.0 5000.0
Min Max
100.0 140.0
OverFlux spd thr
1200
PAR 2312
Min Max
0 1
ADV200 • Functions description and parameters list
Acc Mod
ERW __S
Acc Mod
ERW __S
Acc Mod
ERWZ __S
Acc Mod
ERW __S
Acc Mod
ERW __S
(rpm)
Acc Mod
ERWZ __S