NORD Drivesystems BU0700 - Manual (Page 70)

NORDAC SK 700E Operating Manual
70 Subject to technical alterations BU 0700 GB-1411
Parameter Setting value / Description / Note Available with option
P206 (P) cos

always visible
0.50...0.90
[

]
The motor cos

is a decisive parameter for the current vector control.
P207 (P) Star Delta connection always visible
0 ... 1
[

]
0 = Star 1 = Delta
The motor circuit is decisive for stator resistance measurement and therefore for current vector control.
P208 (P) Stator resistance always visible
0.00...300.00

[

]
Motor stator resistance

line resistance with a DC motor.
Has a direct influence on the current control of the FI. Too high a value will lead to a possible
overcurrent; too low a value to a motor torque that is too low.
For simple measurement, this parameter can be set to "Zero". Pressing the ENTER key initiates the
automatic measurement between two motor phases. In the FI, the resistance on the line is measured
on the basis of the delta or star circuit (P207) and the value saved.
Note: For correct function of the current vector control, the stator resistance must be
automatically measured by the FI.
The motor must not be disconnected from the FI during the measurement!
P209 (P) No load current always visible
0.1...540.0 A
[

]
This value is always calculated automatically from the motor data if there is a change in the parameter
>cos

< P206 and the parameter >Nominal current< P203.
Note: If the value is to be entered directly, then it must be set as the last motor data. This is the
only way to ensure that the value will not be overwritten.
P210 (P) Static boost always visible
0 ... 400 %
[ 100 ]
The static boost affects the current that generates the magnetic field. This is equivalent to the no load
current of the respective motor and is therefore load-independent. The no load current is calculated
using the motor data. The factory setting of 100% is sufficient for normal applications.
P211 (P) Dynamic boost always visible
0 ... 150 %
[ 100 ]
The dynamic boost affects the torque generating current and is therefore a load-dependent parameter.
The factory 100% setting is also sufficient for typical applications.
Too high a value can lead to overcurrent in the FI. Under load, the output current is raised too much.
Too low a value will lead to insufficient torque.
P212 (P) Slip compensation always visible
0 ... 150 %
[ 100 ]
The slip compensation increases the output frequency, dependent on load, to keep the DC
asynchronous motor speed approximately constant.
The factory setting of 100% is optimal when using DC asynchronous motors and correct motor data
has been set.
If several motors (different loads or outputs) are operated with one FI, the slip compensation P212
must be set to 0%. This excludes any negative influences.
This is equally valid for synchronous motors that do not have slip due to their design.
P213 (P) ISD control loop gain always visible
25 ... 400 %
[ 100 ]
This parameter influences the control dynamics of the FI current vector control (ISD control). Higher
settings make the controller faster, lower settings slower.
Dependent on application type, this parameter can be altered, e.g. to avoid unstable operation
P214 (P) Torque precontrol always visible
-200 ... 200 %
[ 0 ]
This function allows a value for the expected torque requirement to be set in the controller. This
function can be used in lifting applications for a better load transfer during start-up.
Note: Motor torques (with rotation field R) are entered with a positive sign, generator torques (with
rotation field L) are entered with a negative sign.

These setting values are dependent on the selection in parameter P200.