Danfoss VLT AutomationDrive FC 302 Programming Manual page 43

Parameter Descriptions
1-29 Automatic Motor Adaptation (AMA)
Option: Function:
NOTICE
This parameter cannot be adjusted while
the motor is running.
The AMA function optimises dynamic motor
performance by automatically optimising the
advanced motor parameters
(parameter 1-30 Stator Resistance (Rs) to
parameter 1-35 Main Reactance (Xh)) at motor
standstill.
Activate the AMA function by pressing [Hand
on] after selecting [1] or [2] Enable Reduced
AMA. See also the section Automatic Motor
Adaptation in the Design Guide. After a normal
sequence, the display reads: "Press [OK] to
finish AMA". After pressing [OK], the frequency
converter is ready for operation.
[0] Off
*
[1] Enable Performs AMA of the stator resistance R
Complete rotor resistance R
AMA
X , the rotor leakage reactance X
1
reactance X . Do not select this option if an LC
h
filter is used between the frequency converter
and the motor.
FC 301: The Complete AMA does not include X
measurement for FC 301. Instead, the X
is determined from the motor database. R
the best adjustment method (see 1-3* Adv.
Motor Data).
It is recommended to obtain the Advanced
Motor Data from the motor manufacturer to
enter into parameter 1-31 Rotor Resistance (Rr)
through parameter 1-36 Iron Loss Resistance (Rfe)
for best performance.
Complete AMA cannot be performed on
permanent magnet motors.
[2] Enable Performs a reduced AMA of the stator
Reduced resistance R in the system only. This option is
s
AMA
available for standard asynchronous motors and
non-salient PM motors.
Note:
•
For the best adaptation of the frequency
converter, run AMA on a cold motor.
•
AMA cannot be performed while the motor is
running.
®
VLT AutomationDrive FC 301/302 Programming Guide
, the
S
, the stator leakage reactance
r
and the main
2
h
value
h
is
S
MG33MI02 - Rev. 2013-11-20
NOTICE
It is important to set motor parameter group 1-2* Motor
Data 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.
NOTICE
Avoid generating external torque during AMA.
NOTICE
If one of the settings in parameter group 1-2* Motor
Data is changed, parameter 1-30 Stator Resistance (Rs) to
parameter 1-39 Motor Poles, the advanced motor
parameters, return to default setting.
NOTICE
AMA works problem-free on 1 motor size down, typically
works on 2 motor sizes down, rarely works on 3 sizes
down and never work on 4 sizes down. Keep in mind
that the accuracy of the measured motor data is poorer
when operating on motors smaller than nominal
frequency converter size.
3.3.5 1-3* Adv. Motor Data
Parameters for advanced motor data. Ensure that the
motor data in parameter 1-30 Stator Resistance (Rs) to
parameter 1-39 Motor Poles match the motor. The default
settings are based on standard motor values. If the motor
parameters are not set correctly, a malfunction of the
frequency converter system may occur. If the motor data
are unknown, running an AMA (Automatic Motor
Adaptation) is recommended. See
parameter 1-29 Automatic Motor Adaptation (AMA).
Parameter groups 1-3* Adv. Motor Data and 1-4* Adv. Motor
Data II cannot be adjusted while the motor is running.
NOTICE
A simple check of the X1 + Xh sum value is to divide the
line to line motor voltage by the sqrt(3) and divide this
value by the motor no load current. [VL-L/sqrt(3)]/I
X1 + Xh, see Illustration 3.6. These values are important
to magnetise the motor properly. For high pole motors it
is highly recommended to perform this check.
3 3
=
NL
41