Danfoss VLT 2800 Series General Information Manual page 43

Function:
The nominal, rated current of the motor I
of the variable frequency drive calculation of features
such as torque and motor thermal protection.
Description of choice:
Set a value that corresponds to the nameplate data on
the motor. Set the motor current I
count whether the motor is star-connected Y or delta-
connected Δ.
106 Rated motor speed
(MOTOR NOM. SPEED)
Value:
100 - f x 60
M,N
Depends on parameter 104 Mo-
(max. 60000
rpm)
Function:
This is where to set the value that corresponds to the
rated motor speed n that can be seen from the
M,N
nameplate data.
Description of choice:
Select a value that corresponds to the nameplate data
on the motor.
NOTE
The max. value equals f
set in parameter 104 Motor frequency,
f .
M,N
107 Automatic motor tuning, AMT
(auto motor tun.)
Value:
Optimisation off (AMT off)
Optimisation on (AMT start)
Function:
NOTE
AMT is not possible on VLT 2880-82.
= factory setting, () = display text, [] = value for use in communication via serial communication port
®
MG.27.A2.22 - VLT is a registered Danfoss trademark
forms part
M,N
taking into ac-
M,N
tor frequency, f
M,N
See Automatic motor tuning in this manual for the AMT
procedure.
Select Optimization on [2] as part of the AMT procedure
if you want the adjustable frequency drive to perform
automatic motor tuning.
x 60. f to be
M,N M,N
After setting of parameters 102-106 Nameplate data, a
number of adjustments of various parameters is car-
ried out automatically, including stator resistance R
[0]
A manually entered R
[2]
shaft performance can be improved by fine-tuning R
and X
®
VLT 2800 Series
- For AMT to define the motor parameters ac-
ccurately, the correct nameplate data for the
motor connected to the adjustable frequency
drive must be keyed into parameters 102 to
106.
- Alarms will appear in the display if faults arise
during tuning of the motor. See Warnings/
alarms messages in this manual.
As a rule, the AMT function can measure the
-
R values for motors that are 1-2 sizes larger
S
or smaller than the adjustable frequency
drive's nominal size.
If you wish to interrupt automatic motor tun-
-
ing, press the [STOP/RESET] key.
NOTE
AMT may not be performed on motors
connected in parallel, nor may setup
changes be made while AMT is running.
Description of choice:
Stator resistance R
108
(STATOR RESISTAN)
Value:
0.000 - X.XXX Ω
Depends on choice of motor
Function:
must apply to a cold motor. The
S
, see procedure below.
S
NOTE
Parameters 108 Stator resistance R
109 Stator reactance X
to be changed if nameplate data has been
set.
S
.
S
S
and
S
are normally not
S
43