Danfoss VLT AutomationDrive FC 360 Programming Manual page 41

Parameter Descriptions
1-38 q-axis Inductance (Lq)
Range: Function:
NOTICE
Size [ 0.000 -
related 65535 mH]
*
This parameter cannot be
adjusted while the motor is
running.
Set the value of the q-axis
inductance. Find the value in the
motor datasheet or perform an AMA
on a cold motor.
1-39 Motor Poles
Range: Function:
NOTICE
Size [2 -
related 100 ]
*
This parameter cannot be adjusted
while the motor is running.
Enter the number of motor poles.
The motor pole value is always an even
number, because it refers to the total pole
numbers, not pairs of poles.
4.2.5 1-4* Adv. Motor Data II
Set parameters for advanced motor data.
1-40 Back EMF at 1000 RPM
Range: Function:
Size [ 1 - Set the nominal back EMF for the motor
related 9000 V] when running at 1000 RPM.
*
Back EMF is the voltage generated by a PM
motor when no frequency converter is
connected and the shaft is turned
externally. Back EMF is normally specified
for nominal motor speed or for 1000 RPM
measured between 2 lines. If the value is
not available for a motor speed of 1000
RPM, calculate the correct value as follows:
If back EMF is, for example, 320 V at 1800
RPM, it can be calculated at 1000 RPM:
Example
Back EMF 320 V at 1800 RPM. Back EMF =
(Voltage/RPM)*1000 = (320/1800)*1000 =
178.
This parameter is only active when
parameter 1-10 Motor Construction is set to
options that enable PM (permanent
magnet) motors.
NOTICE
When using PM motors, it is
recommended to use brake resistors.
MG06C702
Programming Guide
1-42 Motor Cable Length
Range:
50 m
*
1-43 Motor Cable Length Feet
Range:
164 ft
*
1-44 d-axis Inductance Sat. (LdSat)
Range:
Size
related
1-45 q-axis Inductance Sat. (LqSat)
Range:
Size
related
*
1-46 Position Detection Gain
Range:
100 %
*
1-48 Current at Min Inductance for d-axis
Range:
100 %
Danfoss A/S © 06/2017 All rights reserved.
Function:
[0 - 100 m] Set the motor cable length in meters.
Function:
[0 - 328 ft] Set the motor cable length. The length unit
is foot.
Function:
[ 0 - This parameter is active only when
65535 parameter 1-10 Motor Construction is set to
mH] [3] PM, salient IPM.
This parameter corresponds to the saturation
inductance of d-axis. The default value is the
value set in parameter 1-37 d-axis Inductance
(Ld). In most cases, do not change the
default value. If the motor supplier provides
the saturation curve, enter the d-axis
inductance value, which is under 100% of
the nominal current or perform an AMA on a
cold motor.
Function:
[ 0 - This parameter is active only when
65535 parameter 1-10 Motor Construction is set to
mH] [3] PM, salient IPM.
This parameter corresponds to the q-axis
saturation inductance. The default value is
the value set in parameter 1-38 q-axis
Inductance (Lq). In most cases, do not
change the default value. If the motor
supplier provides the saturation curve, enter
the q-axis inductance value, which is under
100% of the nominal current or perform an
AMA on a cold motor.
Function:
[ 20 - Adjust the amplitude of the test pulse
200 %] during position detection at start. Adjust
this parameter to improve the position
measurement.
Function:
[ 20 - 200 %] Use this parameter to set the inductance
saturation point.
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