Illustration 2.1:
Motor equivalent diagram for an asynchronous motor
1-30 Stator Resistance (Rs)
Range:
Function:
1.4000
Ohm*
[0.0140 - 140.0000 Ohm]
Set the stator resistance value. Enter the value from a motor data sheet or perform an AMA on a
cold motor. This parameter cannot be adjusted while the motor is running.
1-35 Main Reactance (Xh)
Range:
Function:
100.0000
Ohm*
[1.0000 - 10000.0000 Ohm]
Set the main reactance of the motor using one of these methods:
1.
Run an AMA on a cold motor. The frequency converter 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 frequency converter establishes the setting on the basis of
the motor name plate data.
NB!
This parameter cannot be adjusted while running.
1-36 Iron Loss Resistance (Rfe)
Range:
Function:
10000.000
Ohm*
[0 - 10000.000 Ohm]
Enter the equivalent iron loss resistance (R
Fe
) value to compensate for iron losses in the motor.
The R
Fe
value cannot be found by performing an AMA.
The R
Fe
value is especially important in torque control applications. If R
Fe
is unknown, leave par.
on default setting.
NB!
This parameter cannot be adjusted while the motor is running.
VLT
®
AQUA Drive Programming Guide
2 Parameter Description
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
39
2
