nord NORDAC FLEX SK 200E Series User Manual page 151

Stator resistance
P208
(stator resistance)
0.00 ... 300.00 Ω
Motor stator resistance ⇒ Resistance of a phase winding with a three-phase motor.
{ see information }
Has a direct effect on current control of the VFD. Too high a value can lead to overcurrent; too low
a value to low motor torque.
Parameter P220 can be used for simple measurement. Parameter P208 can be used for manual
setting or as information about the result of an automatic measurement.
Note:
For optimum functioning of current vector control, stator resistance must be measured
automatically by the VFD.
Default setting
The default setting depends on the rated VFD output or the setting in P200.
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No load current
P209
(no load current)
0.0 ... 1000.0 A This value is always calculated automatically from motor data if there is a change in parameter
P206 "cos ϕ" and parameter P203 "Nominal current".
{ see information }
Note: If the value is to be entered directly, then it must be set as the last of the motor data. This is
the only way to ensure that the value will not be overwritten.
Default setting
The default setting depends on the rated VFD output or the setting in P200.
Pos : 350 /Anleitungen/El ektr onik /FU und Starter/5. Par ameter/Par ameter auflistung (P000 ...)/P200- P299/Param eter P210 – Statischer Boost @ 0\m od_1327590156790_14638.docx @ 14922 @ @ 1
Static boost
P210
(static boost)
0 ... 400 % Static boost affects the current which 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
{ 100 }
using the motor data. The factory setting of 100% is sufficient for typical applications.
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Dynamic boost
P211
(dynamic boost )
0 ... 150 % Dynamic boost affects the torque-generating current and is therefore a load-dependent parameter.
The factory setting of 100% is also sufficient for typical applications.
{ 100 }
Too high a value can result in overcurrent in the VFD. The output voltage will then rise too sharply
under load. Too low a value will lead to insufficient torque.
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With certain applications, particularly those with high centrifugal mass (e.g. fan drives), it may be
necessary to control the motor with the aid of a U/f characteristic curve. In order to do this, set
parameters P211 and P212 each to 0%.
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Slip compensation
P212
(slip compensation)
0 ... 150 % Slip compensation increases the output frequency depending on load in order to keep the DC
asynchronous motor speed approximately constant.
{ 100 }
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 run with one VFD, set slip compensation P212 to
0%. This excludes any negative effects. With PMSM motors, the parameter must be left at the
factory setting.
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BU 0200 en-US-4920
Information
Information
Information
5 Parameter
S
S
S
S
V/f characteristic curve
S
P
P
P
P
P
151