Lenze i410 - Imax Controller

9.4.6.6 Imax controller
For a quick commissioning, the calculaons and sengs are made automacally during the
mot
or calibraon.
For typical applicaons, a manual adaptaon of the parameters of the Imax
c
ontroller is not recommended. A wrong seng may have a negave eect on
the control. For special applicaons, contact the manufacturer before adapng
the parameters.
Precondions
The Imax controller is only eecve in the motor control type "V/f characterisc control (VFC
open loop)".
Details
The Imax controller becomes acve in the V/f operaon if the actual motor current exceeds
the ma
ximum overload current "Max current". The Imax controller changes the output
frequency to counteract the exceedance.
The maximum overload current "Max current" is dened in 0x6073 (P324.00) in percent with
regard to the rated motor current "Motor rated current" 0x6075 (P323.00).
If the maximum overload current is exceeded:
•
During operaon in motor mode, the Imax controller reduces the output frequency.
•
During operaon in generator mode, the Imax controller increases the output frequency.
Seng notes
If oscillaons occur at the current limit during operaon:
•
R
educe gain of the Imax controller in 0x2B08:001 (P333.01).
•
Increase reset me of the Imax controller in 0x2B08:002
(P333.02).
•
Carry out the changes in small steps only (by 2 ... 3 % of the set value) unl the oscillaons
do not exist anymore.
If the Imax controller does not respond fast enough aer the maximum current has been
exceeded:
•
Increase gain of the Imax controller in 0x2B08:001 (P333.01).
•
Reduce reset me of the Imax controller in 0x2B08:002 (P333.02).
•
Carry out the changes in small steps only (by 2 ... 3 % of the set value in each case) unl
the response me is acceptable.
Parameter
Address Name / seng range / [default seng] Informaon
0x2822:019 Calculate Imax controller parameter
0 ... [0] ... 1
1 = start automac calculaon of the Imax controller parameters.
•
Gain 0x2B08:001
(P333.01) and reset me 0x2B08:002 (P333.02) of
the Imax controller are recalculated and set.
0x2B08:001
(P333.01)
V/f Imax controller: Gain
(V/f Imax contr.: Gain)
0.000 ... [0.284]* ... 1000.000 Hz/A
* Default seng dependent on the model.
Gain factor Vp of the Imax controller.
0x2B08:002
(P333.02)
V/f Imax controller: Reset me
(V/f Imax contr.: Reset me)
1.0 ... [2.3]* ... 2000.0 ms
* Default seng dependent on the model.
Reset me Ti of the Imax controller.
0x2DE0:010 V/f behavior
0 ... [0] ... 65535
•
Seng can only be changed if the inverter is
disabled.
•
From version 05.03
Calculaon source for slip in the V/f control.
Bit 0 Slip compensaon via equivalent circuit
diagram
Bit 0 = 0: calculaon via motor data label (standard).
Bit 0 = 1: calculaon of magnesing current based on equivalent circuit
diagram (response <= SW 05.02.00).
Conguring the motor control
Opons for opmizing the control loops
Mot
or control sengs
187