Danfoss VLT AutomationDrive FC 300 Series Programming Manual page 39

Parameter Descriptions
NOTE
This parameter cannot be adjusted while the motor is
running.
NOTE
3 3
It is important to set motor parameter group 1-2*
correctly, since these form part of the AMA algorithm. An
AMA must be performed to achieve optimum dynamic
motor performance. It may take up to 10 min, depending
on the power rating of the motor.
NOTE
Avoid generating external torque during AMA.
NOTE
If one of the settings in parameter group 1-2* is changed,
1-30 Stator Resistance (Rs) to 1-39 Motor Poles, the
advanced motor parameters, will return to default setting.
NOTE
AMA will work problem-free on 1 motor size down,
typically work on 2 motor sizes down, rarely work on 3
sizes down and never work on 4 sizes down. Please keep
in mind that the accuracy of the measured motor data will
be poorer when operating on motors smaller than nominal
VLT size.
3.3.4 1-3* Adv. Motor Data
Parameters for advanced motor data. The motor data in
1-30 Stator Resistance (Rs) to 1-39 Motor Poles must match
the relevant motor in order to run the motor optimally.
The default settings are figures based on common motor
parameter values from standard motors. If the motor
parameters are not set correctly, a malfunction of the
frequency converter system may occur. If the motor data is
not known, running an AMA (Automatic Motor Adaptation)
is recommended. See the Automatic Motor Adaptation
section in the Design Guide. The AMA sequence will adjust
all motor parameters except the moment of inertia of the
rotor and the iron loss resistance (1-36 Iron Loss Resistance
(Rfe)).
Parameter groups 1-3* and 1-4* cannot be adjusted while
the motor is running.
38
®
VLT AutomationDrive Programmming Guide
I
1
U
1
Illustration 3.6 Motor equivalent diagram for an asynchronous
motor
NOTE
A simple check of the X1 + Xh sum value is to divide the
line to line motor voltage by the sqrt(3) and divide this
value by the motor no load current. [VL-L/sqrt(3)]/I
+ Xh. These values are important to properly magnetize
the motor. For high pole motors it is highly recommended
to perform this check.
1-30 Stator Resistance (Rs)
Range:
Size related
1-31 Rotor Resistance (Rr)
Range:
Size
related
1-33 Stator Leakage Reactance (X1)
Range:
Size
related
®
MG33ME02 - VLT is a registered Danfoss trademark
P 1-34
P 1-33
P 1-30
X
R
s 1δ
P 1-36
R
Fe
Function:
[ 0.0140 - Set the stator resistance value.
*
140.0000 Ohm] Enter the value from a motor
data sheet or perform an AMA
on a cold motor.
Function:
[ 0.0100 - Fine-tuning R
r
100.0000
performance. Set the rotor resistance
*
Ohm] value using one of these methods:
1. Run an AMA on a cold motor.
The frequency converter will
measure the value from the
motor. All compensations are
reset to 100%.
2. Enter the R
Obtain the value from the
motor supplier.
3. Use the R
frequency converter establishes
the setting on the basis of the
motor nameplate data.
Function:
[ 0.0400 - Set the stator leakage reactance of the
400.0000 motor using one of these methods:
*
Ohm]
1. Run an AMA on a cold motor.
The frequency converter will
X'
2δ
P 1-35 P 1-31
X
R'
h
r
= X1
NL
will improve shaft
value manually.
r
default setting. The
r