NORD Drivesystems BU0200 - Manual (Page 185)

SK 200E Manual for frequency inverters
184 Subject to technical alterations BU 0200 GB-4411
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P211
7
Dynamic boost
(Dynamic boost)
S P
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 therefore, the output voltage will
be raised too sharply. Too low a value will lead to insufficient torque.
P212 8
Slip compensation
(Slip compensation)
S P
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 rules out a negative influence. This also applies to synchronous
motors that do not have slip due to their design.
P213
ISD ctrl. loop gain
(Amplification of ISD control )
S P
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.
Depending on the type of application, this parameter can be altered, e.g. to avoid unstable
operation.
P214
Torque precontrol
(Torque precontrol)
S P
-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: with rotation field to the right, motor torques are entered with a positive sign,
generator torques are entered with a negative sign. The reverse applies for the counter
clockwise rotation.
P215
Boost precontrol
(Boost precontrol)
S P
0 ... 200 %
{ 0 }
Only with linear characteristic curve (P211 = 0% and P212 = 0%).
For drives that require a high starting torque, this parameter provides an option for switching in
an additional current during the start phase. The application time is limited and can be selected
at parameter >Time boost precontrol< P216.
All current and torque current limits that may have been set (P112 and P536, P537) are
deactivated during the boost lead time.
7
Note: P211 and P212 can be deactivated with the DIP switches, see Section 5.2.2.2
8
Note: P211 and P212 can be deactivated with the DIP switches, see Section 5.2.2.2