Danfoss VLT 2800 Series, Общее руководство пользователя, Страница: 43 / 120

Function:
The nominal, rated current of the motor I
M,N
forms part
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
M,N
taking into ac-
count whether the motor is star-connected Y or delta-
connected
Δ .
106 Rated motor speed
(MOTOR NOM. SPEED)
Value:
100 - f
M,N
x 60
(max. 60000
rpm) Depends on parameter 104 Mo-
tor frequency, f
M,N
Function:
This is where to set the value that corresponds to the
rated motor speed n
M,N
that can be seen from the
nameplate data.
Description of choice:
Select a value that corresponds to the nameplate data
on the motor.
NOTE
The max. value equals f
M,N
x 60. f
M,N
to be
set in parameter 104 Motor frequency,
f
M,N
.
107 Automatic motor tuning, AMT
(auto motor tun.)
Value:
Optimisation off (AMT off) [0]
Optimisation on (AMT start) [2]
Function:
NOTE
AMT is not possible on VLT 2880-82.
- 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
S
values for motors that are 1-2 sizes larger
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.
See Automatic motor tuning in this manual for the AMT
procedure.
Description of choice:
Select Optimization on [2] as part of the AMT procedure
if you want the adjustable frequency drive to perform
automatic motor tuning.
108 Stator resistance R
S
(STATOR RESISTAN)
Value:
0.000 - X.XXX
Ω
Depends on choice of motor
Function:
After setting of parameters 102-106 Nameplate data, a
number of adjustments of various parameters is car-
ried out automatically, including stator resistance R
S
.
A manually entered R
S
must apply to a cold motor. The
shaft performance can be improved by fine-tuning R
S
and X
S
, see procedure below.
NOTE
Parameters 108 Stator resistance R
S
and
109
Stator reactance X
S
are normally not
to be changed if nameplate data has been
set.
VLT
®
2800 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.27.A2.22 - VLT
®
is a registered Danfoss trademark 43
Prog
rammi
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