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.
130BA065.12
P 1-30
R
Fe
X
h
R'
r
R
s
U
1
I
1
P 1-33
P 1-34
P 1-31
P 1-35
P 1-36
X'
2δ
X
1δ
Figure 3.1 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
NL
= X1
+ 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:
Function:
Application dependent
*
[Application dependant]
1-31 Rotor Resistance (Rr)
Range:
Function:
Application
dependent
*
[Application
dependant]
Fine-tuning R
r
will improve shaft
performance. Set the rotor
resistance value using one of these
methods:
1.
Run an AMA on a cold
motor. The Adjustable
frequency drive will
measure the value from
the motor. All compen-
sations are reset to 100%.
2.
Enter the R
r
value
manually. Obtain the value
from the motor supplier.
3.
Use the R
r
default setting.
The Adjustable frequency
drive establishes the
setting on the basis of the
motor nameplate data.
1-33 Stator Leakage Reactance (X1)
Range:
Function:
Application
dependent
*
[Application
dependant]
Set the stator leakage reactance of
the motor using one of these
methods:
1.
Run an AMA on a cold
motor. The Adjustable
frequency drive will
measure the value from
the motor.
2.
Enter the X
1
value
manually. Obtain the
value from the motor
supplier.
3.
Use the X
1
default setting.
The Adjustable frequency
drive establishes the
setting on the basis of the
motor nameplate data.
1-34 Rotor Leakage Reactance (X2)
Range:
Function:
Application dependent
*
[Application dependant]
1-35 Main Reactance (Xh)
Range:
Function:
Application
dependent
*
[Application
dependant]
Set the main reactance of the
motor using one of these methods:
1.
Run an AMA on a cold
motor. The Adjustable
frequency drive will
measure the value from
the motor.
2.
Enter the X
h
value
manually. Obtain the value
from the motor supplier.
3.
Use the X
h
default setting.
The Adjustable frequency
drive establishes the
setting on the basis of the
motor nameplate data.
1-36 Iron Loss Resistance (Rfe)
Range:
Function:
Application dependent
*
[Application dependant]
1-37 d-axis Inductance (Ld)
Range:
Function:
Application dependent
*
[Application dependant]
Parameter Descriptions
FC 300 Programming Guide
MG33MD22 - VLT
®
is a registered Danfoss trademark
3-17
3
3
Remote Site Products - 1-888-532-2706 - www.remotesiteproducts.com
http://www.remotesiteproducts.com/p-20872-Danfoss-131H4490-VLT-Automation-VT-Drive-VFD-FC302-460V-25-HP.aspx