COSMOS DRIVER SERIES 3000 - USE AND MAINTENANCE MANUAL
1.3.8
KPP [rpm/G]
2
Position proportional gain.
The driver continuously detects the rotor position
and compares it to the reference position. The
difference between the two values is multiplied by
the proportional gain, in order to determine the
proportional speed.
The higher the position difference is, the higher the
speed rate applied to the motor will be. Through this
process, if it is continuous, the motor tends to
assume the reference position, even when the load
conditions applied to the motor change.
The proportional gain must be usually determined
for each specific case, according to the motor
application. This value is strongly influenced by the
inertial mass applied to the motor shaft. The more
the mass is, the lower the gain will be.
In practical tests, it is necessary to find out the gain
empirically, by progressively increasing the value,
until the motor begins to be unsteady, depending on
the motor noise and vibrations. Once you reached
the limit, decrease the gain by 10–20%, as a safety
margin.
Min=0.0rpm/Gr, Max=+2500.4rpm/Gr.
1.3.9
KDP []
2
Position derivative gain.
This gain allows inferring the speed set-point from
the difference between two consecutive positions.
The derivative gain considerably improves the
position control performance.
Min=0, Max=+10
Up to date, the gain is set to 1. Its modification does
not affect the control.
1.3.10
VRMS NOMINAL[V]
3
Driver rated voltage.
This value indicates the driver power supply.
If the rated voltage of the selected motor is not
within the range set for the driver, the error “Motor
voltage different from driver voltage” will be
displayed.
Min=230V, Max=+480V.
1.3.11
USE EXT BRAKE
3
Use of the external brake resistance.
It enables you to determine whether to use the
internal resistance or the external one.
Options=No, Yes.
7.2.7 Motor menu
7.2.7.1
Models for brushless motor and Sercos II version
Menu
Entry
Lev
.
Description
1.4
>MOTOR
-
In this section it is possible to set the motor type in
use and the corresponding parameters
1.4.1
MODEL
VVV SSSS
3
Motor model.
The first row indicates the model/identification code
of the motor you are going to use; the second row
displays the data concerning the phase voltage and
rated speed.
These data can be modified by the next parameters.
Options: motor homologated models
1.4.2
VRMS NOM [V]
3
Rms rated voltage indicated by the motor supplier.
Min=0V, Max=+1000V
Ver. 1.07
Pag. 69
