Danfoss FC 300 Series User Manual

1-29 Automatic Motor Adaptation (AMA)
Option: Function:
The AMA function optimizes dynamic motor
performance by automatically optimizing the
advanced motor parameters (1-30 Stator
Resistance (Rs) to 1-35 Main Reactance (Xh)) at
motor standstill.
Activate the AMA function by pressing [Hand on]
after selecting [1] or [2]. See also the section
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 adjustable frequency drive is ready
for operation.
This parameter cannot be adjusted while the
motor is running.
[0]
*
Off
[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
. Do not select this option if an LC
filter is used between the adjustable frequency
drive and the motor.
FC 301: The Complete AMA does not include X
h
measurement for FC 301. Instead, the X
h
value is
determined from the motor database. R
S
is the
best adjustment method (see 1-3* Addl. Motor
Data).
T4/T5 E and F frames, T7 D, E and F frames will
only run a reduced AMA when the complete
AMA is selected. It is recommended to obtain the
Advanced Motor Data from the motor
manufacturer to enter into par. 1-31 through
1-36 for best performance.
[2] Enable
reduced
AMA
Performs a reduced AMA of the stator resistance
R
s
in the system only.
Note:
•
For the best adaptation of the adjustable frequency
drive, run AMA on a cold motor.
•
AMA cannot be performed while the motor is
running.
•
AMA cannot be performed on permanent magnet
motors.
NOTE!
It is important to set motor par. 1-2* correctly, since these
form part of the AMA algorithm. An AMA must be performed
to achieve optimum dynamic motor performance. It may
take up to 10 min, depending on the power rating of the
motor.
NOTE!
Avoid generating external torque during AMA.
NOTE!
If one of the settings in par. 1-2* is changed, 1-30 Stator
Resistance (Rs) to 1-39 Motor Poles, the advanced motor
parameters, will return to default setting.
NOTE!
AMA will work problem-free on 1 motor size down, typically
work on 2 motor sizes down, rarely work on 3 sizes down
and never work on 4 sizes down. Please keep in mind that
the accuracy of the measured motor data will be poorer
when you operate on motors smaller than nominal VLT size.
3.3.4 1-3* Addl. Motor Data
Parameters for advanced motor data. The motor data in
1-30 Stator Resistance (Rs) to 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 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 Automatic Motor
Adaptation section in the Design Guide. The AMA sequence
will adjust all motor parameters except the moment of
inertia of the rotor and the iron loss resistance (1-36 Iron Loss
Resistance (Rfe)).
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
Parameter Descriptions FC 300 Programming Guide
MG.33.MA.22 - VLT
®
is a registered Danfoss trademark 3-15
3
3

Danfoss FC 300 Series Specifications

General

Brand	Danfoss
Model	FC 300 Series
Category	DC Drives
Language	English