Danfoss VLT HVAC Series Programming Manual page 46

3 Parameter Description
NOTE!
If one of the settings in par. 1-2* Motor Data is changed, par.1-30
parameters, will return to the default setting.
This parameter cannot be adjusted while the motor is running.
NOTE!
3
Full AMA should be run without filter only while reduced AMA should be run with filter.
Automatic Motor Adaptation
See section
3.3.3 1-3* Adv. Motor Data
Parameters for advanced motor data. The motor data in par.1-30
to run the motor optimally. The default settings are figures based on common motor parameter values from normal standard motors. If the motor
parameters are not set correctly, a malfunction of the adjustable frequency drive system may occur. If the motor data is not known, running an AMA
(Automatic Motor Adaptation) is recommended. See the
the moment of inertia of the rotor and the iron loss resistance (par.1-36
Par. 1-3* and par. 1-4* cannot be adjusted while the motor is running.
Figure 3.1: Motor equivalent diagram for an asynchronous motor
1-30 Stator Resistance (Rs)
Range:
1.4000 [0.0140 - 140.0000 Ohm]
Ohm*
1-35 Main Reactance (Xh)
Range:
100.0000 [1.0000 - 10000.0000 Ohm]
Ohm*
3-22
- application example.
Stator Resistance (Rs)
Automatic Motor Adaptation
Iron Loss Resistance (Rfe)
Function:
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.
Function:
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 value manually. Obtain the value from the motor supplier.
h
3. Use the X default setting. The adjustable frequency drive establishes the setting on the
h
basis of the motor nameplate data.
MG.11.C6.22 - VLT
VLT ® HVAC Drive Programming Guide
Stator Resistance (Rs) to par.1-39
to par.1-39 Motor Poles must match the relevant motor in order
section. The AMA sequence will adjust all motor parameters except
).
® is a registered Danfoss trademark
Motor Poles , the advanced motor