Operating instructions

Mains power must be removed before disconnecting
motor phase cables.
1-29 Automatic Motor Adaptation (AMA)
Option: Function:
The AMA function optimizes dynamic motor
performance by automatically optimizing the
advanced motor parameters par. 1-30 Stator
Resistance (Rs) to par. 1-35 Main Reactance
(Xh)) while the motor is stationary.
[0]
* Off No function
[1] Enable
complete
AMA
performs AMA of the stator resistance R
S
, the
rotor resistance R
r
, the stator leakage
reactance X
1
, the rotor leakage reactance X
2
and the main reactance X
h
.
[2] Enable
reduced AMA
Performs a reduced AMA of the stator resist-
ance R
s
in the system only. Select this option if
an LC filter is used between the frequency
converter and the motor.
Activate the AMA function by pressing [Hand on] after select-
ing [1] or [2]. See also the item Automatic Motor Adaptation in
the Design Guide. After a normal sequence, the display will
read: “Press [OK] to finish AMA”. After pressing the [OK] key
the frequency converter is ready for operation.
NOTE
•
For the best adaptation of the frequency
converter, run AMA on a cold motor
•
AMA cannot be performed while the motor is
running
NOTE
Avoid generating external torque during AMA.
NOTE
If one of the settings in par. 1-2* Motor Data is changed,
par. 1-30 Stator Resistance (Rs) to par. 1-39 Motor Poles,
the advanced motor parameters, will return to default
setting.
This parameter cannot be adjusted while the motor is
running.
NOTE
Full AMA should be run without filter only while
reduced AMA should be run with filter.
See section: Application Examples > Automatic Motor Adapta-
tion in the Design Guide.
3.3.3 1-3* Adv. Motor Data
Parameters for advanced motor data. The motor data in
par. 1-30 Stator Resistance (Rs) to par. 1-39 Motor Poles must
match the relevant motor in order 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 frequen-
cy converter system may occur. If the motor data is not
known, running an AMA (Automatic Motor Adaptation) is
recommended. See the Automatic Motor Adaptation section.
The AMA sequence will adjust all motor parameters except the
moment of inertia of the rotor and the iron loss resistance
(par. 1-36 Iron Loss Resistance (Rfe)).
Illustration 3.1: Motor equivalent diagram for an asynchro-
nous motor
1-30 Stator Resistance (Rs)
Range: Function:
Application
dependent
*
[Application
dependant]
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.
1-31 Rotor Resistance (Rr)
Range: Function:
Application dependent * [Application dependant]
Parameter Description
VLT
®
HVAC Drive Programming Guide
40 MG.11.CA.02 - VLT
®
is a registered Danfoss trademark
3
3