NORD Drivesystems BU0500 User Manual

Page 84

SK 500E – Users Manual for Frequency Inverters

BU 0500 GB-1013

P210

Static boost

(Static boost)

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.

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P211

Dynamic boost

(Dynamic boost)

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.

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P212

Slip compensation

(Slip compensation)

0 ... 150 %

{ 100 }

The slip compensation increases the output frequency, dependent on load, to keep the
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 is equally valid for synchronous motors
that do not have slip due to their design.

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P213

ISD ctrl. loop gain

(Amplification of ISD control)

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.

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P214

Torque precontrol

(Torque precontrol)

-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 right) are entered with a positive sign, generator

torques are entered with a negative sign. The reverse applies for the counter
clockwise rotation.