Automatic Motor Adaption; Motor Current; Motor Magnetizing Current; Start Voltage - Danfoss VLT 3000 Series Product Manual

Parameter description
106
Automatic motor
adaption
(Auto motor set)
107
Motor current (I )
M,N

(Motor current)

108
Motor magnetizing
) ) ) ) )
current (I
Φ Φ Φ Φ Φ
(motor mag. amp)
109

Start voltage

(Start voltage)
Value:
From (Tuning-off)
To (Tuning-on)
Value:
I - I
Φ
VLT,MAX
Value:
0.3 - I
M,N
Value:
0.0 - (U + 10%)
M,N
= Factory setting. Text in ( ) = Display text.
The figures in [ ] are used in bus communication.
®
MG.30.A7.02 - VLT is a registered Danfoss trademark
If this parameter is set to "on" , the fre-
quency converter automatically sets the
[0]
compensation parameters 108-113. Auto-
[1]
matic motor adaption is started by pressing
if the unit is in local setting. If the unit is
Start
set to remote control, an external start signal
is given (terminals 18 and 27). After auto-
matic motor adaption, the values switches
automatically to "from" and the unit trips.
After automatic motor adaption the unit goes
into alarm mode, trips and displays
"AUTOTUN.OK" or "AUTOTUN.FAULT".
The unit can be reset by pressing
activating the reset input (parameter 400,
terminal 16 or parameter 401, terminal 17).
Automatic motor adaption is possible with
up to 50% load on the shaft.
Automatic motor adaption is possible only
on motor sizes which can be selected in pa-
rameter 103 and after setting parameters
103-105.
Warning: The motor will run at 20 Hz dur-
ing part of the tuning. The direction is de-
termined by the reversing signal to
terminal 19 (parameter 403), serial bus
(parameter 507), local rotation direction
(parameter 008) and the sign of the refer-
ence signal.
Read the rated motor current on the
motor's type plate and set the value in
ampere. The value is used for different
calculations in the frequency converter; for
instance thermal overload and torque
indication.
The value is used for different calculations
in the frequency converter; for instance
compensation and torque indication.
If you record a value that is too low the mo-
tor will be over-compensated and the
frequency converter can cut out.
You can set the motor voltage below the
field weakening point independently of the
motor current. Use this parameter to com-
pensate too low starting torque.
If several motors are operating in parallel
the start voltage must normally be raised.
Warning: If the use of start voltage is
overdone it can lead to magnetic
saturation and motor overheating and
the frequency converter may trip out.
Therefore take care when using the
start voltage.
1.. Load and motor
or by
Stop
Reset
91