Rotor Resistance (Rr); Stator Leakage Reactance (X1); Main Reactance (Xh) - Danfoss VLT AutomationDrive Programming Manual

Parameter Descriptions
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.
P 1-33
P 1-30
I
X
1 R
1δ
s
U
1
P 1-36
R
Fe
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
+ 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:
Application dependent
*

1-31 Rotor Resistance (Rr)

Range:
Application [Application
dependent dependant]
*
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FC 300 Programming Guide
P 1-34
X'
2δ
P 1-35 P 1-31
X
R'
h
r
= X1
NL
Function:
[Application dependant]
Function:
Fine-tuning R will improve shaft
r
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 value
r
manually. Obtain the value
from the motor supplier.
3. Use the R default setting.
r
The Adjustable frequency
drive establishes the
setting on the basis of the
motor nameplate data.
®
MG33MD22 - VLT is a registered Danfoss trademark

1-33 Stator Leakage Reactance (X1)

Range: Function:
Application [Application Set the stator leakage reactance of
dependent dependant] the motor using one of these
*
methods:
1-34 Rotor Leakage Reactance (X2)
Range:
Application dependent [Application dependant]
*

1-35 Main Reactance (Xh)

Range: Function:
Application [Application Set the main reactance of the
dependent dependant] motor using one of these methods:
*
1-36 Iron Loss Resistance (Rfe)
Range:
Application dependent [Application dependant]
*
1-37 d-axis Inductance (Ld)
Range:
Application dependent [Application dependant]
*
1. Run an AMA on a cold
motor. The Adjustable
frequency drive will
measure the value from
the motor.
2. Enter the X value
1
manually. Obtain the
value from the motor
supplier.
3. Use the X default setting.
1
The Adjustable frequency
drive establishes the
setting on the basis of the
motor nameplate data.
Function:
1. Run an AMA on a cold
motor. The Adjustable
frequency drive will
measure the value from
the motor.
2. Enter the X value
h
manually. Obtain the value
from the motor supplier.
3. Use the X default setting.
h
The Adjustable frequency
drive establishes the
setting on the basis of the
motor nameplate data.
Function:
Function:
3-17
3 3