➢ This description is not valid for v/f characteristic operation!
The current controller (ds00...ds03) are automatically precharged by writing on
dr99= 0 based on the equivalent circuit data.
Therefore it must be ensured that the equivalent circuit data are correct for the con-
nected motor (e.g. by identification).
Current controller gain, effects proportional and inte-
gral part
Current controller reset time, effects the integral part
(Ki = Kp / Tn)
If the current controller are adjusted manually, dr99 motordata control must be set
to 1 "store motordata, no reg“, otherwise the controller are automatically set to the
calculated values with each power on of the inverter.
The inductance changes at some motors (e.g. by saturation). With the default cur-
rent controller setting an overshoot can occur at current setpoint change which can
trigger an overcurrent error.
The current controller can be too hard at standard design also at very dynamic
changes, high current ripple or other special applications.
The total current controller gain (Kp and Ki of both controllers) can be reduced or
increased with ds14 current control factor.
Percentage factor for the proportional and integral gain of both
current controllers (q-axis and d-axis)
(Value range 0.1…800.0%)
The adjustment of ds14 becomes only effective if a recalculation of the current con-
troller is started via dr99 = 0 or after restarting the inverter, if dr99 is set to 0 "store
motordata,init reg".
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