Danfoss VLT 6000 series Operating Instructions Manual page 88

NB!:
It is important to enter the correct value, since
this forms part of the VVC
106 Rated motor speed, n
(MOTOR NOM. SPEED)
Value:
100 - f x 60 (max. 60000 rpm)
M,N
Depends on parameter 102 Motor power, P
Function:
This is where the value is set that corresponds
to the rated motor speed n
seen from the nameplate data.
Description of choice:
Choose a value that corresponds to the
motor nameplate data.
NB!:
It is important to set the correct value, since
this forms part of the VVC
The max. value equals f
f is set in parameter 104 Motor frequency, f
M,N
107 Automatic motor adaptation, AMA
(AUTO MOTOR ADAPT)
Value:
Optimisation disable (NO AMA)
Automatic adaptation (RUN AMA)
Automatic adaptation with LC-filter
(RUN AMA WITH LC-FILT)
Function:
Automatic motor adaptation is a test algorithm
that measures the electrical motor parameters
at motor standstill. This means that AMA itself
does not supply any torque.
AMA is useful when commissioning systems, where
the user wants to optimise the adjustment of the
frequency converter to the motor applied. This feature
is used in particular where the factory setting does
not adequately cover the motor in question.
For the best adjustment of the frequency converter, it is
recommended to carry out AMA on a cold motor.
It must be noted that repeated AMA runs may
lead to a heating of the motor that will result in
an increase of the stator resistance R
this is not normally critical.
= factory setting. () = display text [] = value for use in communication via serial communication port
88
+
control feature.
M,N
M,N
, which can be
M,N
+
control feature.
x 60.
M,N
.
M,N
[0]
[1]
[2]
. However,
S
®
VLT 6000 HVAC Series
NB!:
It is important to run AMA with any
motors ≥55 kW/ 75 HP
It is possible via parameter 107 Automatic motor
adaptation, AMA to choose whether a complete
automatic motor adaptation Automatic adaptation
[1] is to be carried out, or whether reduced
automatic motor adaptation Automatic adaptation
with LC-filter [2] is to be made.
It is only possible to carry out the reduced test if a
LC-filter has been placed between the frequency
converter and the motor. If a total setting is required, the
LC-filter can be removed and, after completion of the
AMA, it can be reinstalled. In Automatic optimisation
with LC-filter [2] there is no test of motor symmetry and
of whether all motor phases have been connected. The
following must be noted when the AMA function is used:
- For AMA to be able to determine the motor
parameters optimally, the correct nameplate data
for the motor connected to the frequency converter
must be entered in parameters 102 to 106.
- The duration of a total automatic motor adaptation
varies from a few minutes to approx. 10 minutes
for small motors, depending on the rating of
the motor used (the time for a 7.5 kW motor,
for example, is approx. 4 minutes).
- Alarms and warnings will be shown in the display
if faults occur during motor adaptation.
- AMA can only be carried out if the rated motor
current of the motor is min. 35% of the rated
output current of the frequency converter.
- If automatic motor adaptation is to be discontinued,
press the [OFF/STOP] key.
NB!:
AMA is not allowed on motors connected
in parallel.
Description of choice:
Select Automatic adaptation [1] if the frequency
converter is to carry out a complete automatic
motor adaptation.
Select Automatic adaptation with LC-filter [2] if a
LC-filter has been placed between the frequency
converter and the motor.
Procedure for automatic motor adaptation:
1. Set the motor parameters in accordance with
the motor nameplate data given in parameters
102-106 Nameplate data.
MG.61.A5.02 - VLT is a registered Danfoss trademark