Danfoss vlt aqua - Page 49

Illustration 2.1: Motor equivalent diagram for an asynchronous motor
1-30 Stator Resistance (Rs)
Range: Function:
Depend-
ing on
motor
data!
[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:
Depend-
ing on
motor
data.
[Ohm] Set the main reactance of the motor using one of these meth-
ods:
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.
This parameter cannot be adjusted while the motor is running.
1-36 Iron Loss Resistance (Rfe)
Range: Function:
M-
TYPE
*
[1 - 10.000 Ω] Enter the equivalent iron loss resistance (R
Fe
) value to compen-
sate 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 applica-
tions. If R
Fe
is unknown, leave par. 1-36 on default setting.
This parameter cannot be adjusted while the motor is running.
1-39 Motor Poles
Range: Function:
4-po-
lemo-
tor
*
[Value 2 - 100 poles] Enter the number of motor poles.
VLT
®
AQUA Drive Programming Guide 2. Parameter Description
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark 49
2