Danfoss VLT 8000 AQUA series, Руководство по эксплуатации, Страница: 101 / 206

VLT
®
8000 AQUA
Programming
) Global factory setting different from North
American factory setting.
Function:
Select the rated motor frequency f
M,N
.
Description of choice:
Select a value that equals the nameplate
data on the motor.
105 Motor current, I
M,N
(MOTOR CURRENT)
Value:
0.01 - I
VLT,MAX
A
✭
Depends on the choice of motor.
Function:
The rated motor current I
M,N
forms part of the frequency
converter calculations of torque and motor thermal
protection. Set the motor current I
VLT,N
, taking into
account the star Y or delta connected motor.
Description of choice:
Set a value that equals the nameplate data on the motor.
NB!:
It is important to enter the correct value, since
this forms part of the V V C
PLUS
control feature.
106 Rated motor speed, n
M,N
(MOTOR NOM. SPEED)
Value:
100 - f
M,N
x 60 (max. 60000 rpm)
✭
Depends on parameter 102 Motor power, P
M,N
.
Function:
This sets the value that corresponds to the rated
motor speed n
M,N
, 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 V V C
PLUS
control feature.
The max. value equals f
M,N
x 60. f
M,N
is set
in parameter 104 Motor frequency, f
M,N
.
107 Automatic motor adaptation, AMA
(AUTO MOTOR ADAPT)
Value:
✭
Optimization disable (NO AMA) [0]
Automatic adaptation (RUN AMA) [1]
Limited AMA
(RUN LIMITED AMA) [2]
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 where the factory setting does not
match requirements of the motor.
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
S
.
However, this is not normally critical.
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 Limited AMA [2] is to be made.
It is 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 Limited AMA [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 HP motor,
for example, is approx. 4 minutes).
- Alarms and warnings will be shown in the display
if faults occur during motor adaptation.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
101