VLT
®
5000 FLUX
Programming
Description of choice:
The rated motor speed n
M,N
is used i.a. for calculating
the optimal slip compensation.
NB!:
It is important to enter the correct value,
since this forms part of the Flux vector
control feature. The max. value equals f
M,N
x 60. Set f
M,N
in parameter 104.
107 Automatic motor adaptation, AMA
(AUTO MOTOR ADAPT)
Value:
✭
Adaptation off (OFF)
[0]
Adaptation on Complete, R
S
, X
1
, X
2
, X
h
,R
r
(ENABLE COMPLETE AMA)
[1]
Adaptation on Reduced, R
S
(ENABLE REDUCED AMA)
[2]
Function:
If the AMA function is used, the frequency
converter automatically sets the necessary control
parameters (parameters 150-154) with the motor
stationary. Automatic motor adaptation ensures
optimum use of the motor.
For the best possible adaptation of the frequency
converter, it is recommended to run AMA
on a cold motor.
The AMA function is activated by pressing the
[START] key after selecting [1] or [2].
See also section
Automatic motor adaptation
.
After a normal sequence, the display will read "AMA
finished OK". Press the [STOP/RESET] key. The
frequency converter is now ready for operation.
Description of choice:
Select
Enable complete AMA,
if the frequency converter
is to be able to carry out automatic motor adaptation
of the stator resistance R
S
, the rotor resistance R
r
,
the stator leakage reactance x
1
, the rotor leakage
reactance X
2
and the main reactance X
h
.
Select
Optimisation on, Reduced AMA
[2] if a reduced
test is to be carried out, in which only the stator
resistance in the system is determined.
NB!:
It is important to set motor parameters 102-106
correctly, since these form part of the AMA
algorithm. For optimum dynamic motor
adaptation, an AMA must be carried out.
Motor adaptation may take up to 10 minutes,
depending on the power rating of the motor in question.
NB!:
There must not be any externally generating
torque during automatic motor adaptation.
NB!:
If the setting in parameter 102-106 is
changed, the parameters 150-154 will
return to factory setting.
115 Slip compensation
(SLIP COMPENSAT.)
Value:
-400 - 400 %
✭
100 %
Function:
This function is only active together with
Speed Control
Open Loop
(parameter 100) ensuring a nearly constant
speed at varying loads. Compensations are active, but
may be disabled as required in the ‘Load and motor
’
parameter group. Slip compensation is calculated
automatically, i.e. on the basis of the rated motor
speed n
M,N
. In parameter 115, slip compensation can
be fine adjusted in parameter 115, which compensates
for tolerances in the value of n
M,N
.
Slip compensation is not active below the value
stated in parameter 237.
Description of choice:
Enter a percentage value of the rated motor
frequency (parameter 104).
Slip compensation is only active from 10
Hz in open loop.
116 Slip compensation time constant
(SLIP TIME CONST.)
Value:
0.05 - 5.00 sec.
✭
0.50 sec.
Function:
This function is active together with
Speed Control
Open Loop
(parameter 100). This parameter
determines the slip compensation reaction speed.
Description of choice:
A high value results in slow reaction. Opposite
a low value will results in quick reaction. If
low-frequency resonance problems are encountered,
the time setting must be longer.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.55.A6.02 - VLT is a registered Danfoss trademark
71