gefran ADV200

94 ADV200 • Functions description and parameters list
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 UM Type FB BIT Def Min Max Acc Mod
19.13 2300MinimumspeedOL rpm INT16 30 0 CALCI ERW __S
Setting of the minimum speed threshold in the Flux vector OL control mode. Below this limit the sensorless
regulator is disabled.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
19.14 2302MinspeeddelayOL ms UINT16 200 0 5000 ERW __S
Setting of the delay for disabling the sensorless regulator.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
19.15 2304SpeedfilterOL ms FLOAT 5.0 0.1 20.0 ERWZ __S
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 UM Type FB BIT Def Min Max Acc Mod
19.16 2306FluxobservegainOL FLOAT 250.0 10.0 5000.0 ERW __S
Proportional gain of the internal ux observer in the open-loop ux vector control mode.
In case of instability, try changing the value and setting half or twice the default value.
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
19.17 2308OverFluxperc perc FLOAT 100.0 100.0 140.0 ERW __S
The value is expressed as the percentage in excess of the rated ux.
100%
120%
OverFlux perc (%)
PAR 2308
(rpm)OverFlux spd thr
PAR 2312
200 400 600 800 1000 1200
80%
Flux step
PAR 2314
Menu PAR Description UM Type FB BIT Def Min Max Acc Mod
19.18 2310FluxweakeningOL ENUM Enable 0 1 ERWZ __S
Enables or disables ux reduction in the open-loop ux vector control mode.
If set to Disable, the ux 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 ux value of less than the nominal speed of the motor is advantageous in terms of