Danfoss VLT AQUA Drive FC 202 Programming Manual page 54

Parameter Description
3 3
Illustration 3.7 Machine Parameter Definitions of Back EMF of
PM Motors
1-38 q-axis Inductance (Lq)
Range:
Size related
*
mH]
1-39 Motor Poles
Range:
Size [2 -
related 132 ]
*
1-40 Back EMF at 1000 RPM
Range:
Size
related 9000 V]
*
52
Permanent magnet motors
Line-to-line back
EMF in RMS value
at 1000 RPM
speed (mech)
Function:
NOTICE
[0.000 - 1000
This parameter cannot be
adjusted while the motor is
running.
Set the value of the q-axis
inductance. See the motor
datasheet.
Function:
NOTICE
This parameter cannot be adjusted
while the motor is running.
Enter the number of motor poles.
Poles ~n @ 50 Hz
n
2 2700–2880
4 1350–1450
6 700–960
Table 3.7 Pole Counts and Related
Frequencies
Table 3.7 shows the pole numbers for normal
speed ranges of various motor types. Define
motors designed for other frequencies
separately. The motor pole value is always an
even number, because it refers to the total
pole numbers, not pairs of poles. The
frequency converter creates the initial setting
of parameter 1-39 Motor Poles based on
parameter 1-23 Motor Frequency and
parameter 1-25 Motor Nominal Speed.
Function:
[ 10 - Set the nominal back EMF for the motor
when running at 1000 RPM. This
parameter is only active when
Danfoss A/S © 05/2018 All rights reserved.
®
VLT AQUA Drive FC 202
1-40 Back EMF at 1000 RPM
Range:
1-44 d-axis Inductance Sat. (LdSat)
Range:
Size
related
*
1-45 q-axis Inductance Sat. (LqSat)
Range:
Size
related
*
1-47 Torque Calibration
Option:
~n @ 60 Hz
n
3250–3460
1625–1730
840–1153
[0] Off
*
[1] 1st
start
after
pwr-
up
[2] Every
start
[3] 1st
start
with
store
Function:
parameter 1-10 Motor Construction is set
to [1] PM, non-salient SPM.
Function:
[0 - Enter the inductance saturation of L
1000 mH] Ideally, this parameter has the same
value as parameter 1-37 d-axis Inductance
(Ld). If the motor supplier provides an
induction curve, enter the induction
value at 200% of the nominal value.
Function:
[0 - This parameter corresponds to the
1000 mH] inductance saturation of L
parameter has the same value as
parameter 1-38 q-axis Inductance (Lq). If
the motor supplier provides an induction
curve, enter the induction value at 200%
of the nominal value.
Function:
Use this parameter to optimize the torque estimate
in the full speed range. The estimated torque is
based on the shaft power, P
shaft
sure that the R value is correct. The R
s
formula is equal to the power loss in the motor, the
cable, and the frequency converter. When this
parameter is active, the frequency converter
calculates the R value during power-up, ensuring
s
the optimal torque estimate and optimal
performance. Use this feature in cases when it is
not possible to adjust parameter 1-30 Stator
Resistance (Rs) on each frequency converter to
compensate for the cable length, frequency
converter losses, and the temperature deviation on
the motor.
Calibrates at the first start-up after power-up and
keeps this value until reset by a power cycle.
Calibrates at every start-up, compensating for a
possible change in motor temperature since last
start-up. The value is reset after a power cycle.
The frequency converter calibrates the torque at the
first start-up after power-up. This option is used to
update motor parameters:
.
d
. Ideally, this
q
2
= P - R x I . Make
m s
value in this
s
MG20OB02