Danfoss VLT AutomationDrive FC 361 Programming Manual page 42

Parameter Descriptions
1-47 Torque Calibration
Option:
[1] 1st start after
pwr-up
[2] Every start
4 4
[3] 1st start with
store
[4] Every start
with store
4.2.5 1-5* Load Indep. Setting
1-50 Motor Magnetisation at Zero Speed
This parameter is not visible on the LCP.
Range:
100 %
*
40
Function:
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:
•
Parameter 1-30 Stator
Resistance (Rs).
•
Parameter 1-33 Stator
Leakage Reactance (X1).
•
Parameter 1-34 Rotor
Leakage Reactance (X2).
•
Parameter 1-37 d-axis
Inductance (Ld).
The frequency converter calibrates
the torque at every start-up,
compensating for a possible change
in motor temperature since last
start-up. This option is used to
update motor parameters:
•
Parameter 1-30 Stator
Resistance (Rs).
•
Parameter 1-33 Stator
Leakage Reactance (X1).
•
Parameter 1-34 Rotor
Leakage Reactance (X2).
•
Parameter 1-37 d-axis
Inductance (Ld).
Function:
NOTICE
[0 - 300 %]
Parameter 1-50 Motor Magneti-
sation at Zero Speed has no
effect when
parameter 1-10 Motor
Construction = [1] PM, non-
salient SPM.
Use this parameter along with
parameter 1-51 Min Speed Normal
Danfoss A/S © 03/2019 All rights reserved.
VLT® AutomationDrive FC 361
1-50 Motor Magnetisation at Zero Speed
This parameter is not visible on the LCP.
Range:
1-51 Min Speed Normal Magnetising [RPM]
This parameter is not visible on the LCP.
Range:
Size
related
*
1-52 Min Speed Normal Magnetising [Hz]
Range:
Size
related
*
Function:
Magnetising [RPM] to obtain a
different thermal load on the motor
when running at low speed.
Enter a value which is a percentage
of the rated magnetizing current. If
the setting is too low, the torque
on the motor shaft may be
reduced.
Magn. current
100%
Par.1-50
Par.1-51
Par.1-52
Illustration 4.6 Motor Magneti-
zation
Function:
NOTICE
[10 - 600
RPM]
Parameter 1-51 Min Speed
Normal Magnetising [RPM] has
no effect when
parameter 1-10 Motor
Construction = [1] PM, non-
salient SPM.
Set the required speed for normal
magnetizing current. If the speed is
set lower than the motor slip
speed, parameter 1-50 Motor
Magnetisation at Zero Speed and
parameter 1-51 Min Speed Normal
Magnetising [RPM] are of no signif-
icance.
Use this parameter along with
parameter 1-50 Motor Magnetisation
at Zero Speed. See Table 4.3.
Function:
[ 0 - 250.0 Set the required frequency for
Hz] normal magnetizing current. If the
frequency is set lower than the
motor slip frequency,
parameter 1-50 Motor Magnetisation
at Zero Speed is inactive.
Hz
RPM
MG06J202