Danfoss VLT HVAC Drive FC 131 - Page 39

Parameter
Option/range
Default
Usage
Parameter 1-38
q-axis Induc-
tance (Lq)
0.000–1000.000 mH
Size related
Enter the value of the q-axis inductance.
Parameter 1-39
Motor Poles
2–100
4
Enter the number of motor poles.
Parameter 1-40
Back EMF at
1000 RPM
10–9000 V
Size related
Line-line RMS back EMF voltage at 1000 RPM.
Parameter 1-42
Motor Cable
Length
0–100 m
50 m
Enter the motor cable length.
Parameter 1-44
d-axis Induc-
tance Sat.
(LdSat)
0.000–1000.000 mH
Size related
This parameter corresponds to the inductance saturation of
Ld. Ideally, this parameter has the same value as parameter
1-37 d-axis Inductance (Ld). However, if the motor supplier
provides an induction curve, enter the induction value,
which is 200% of the nominal current.
Parameter 1-45
q-axis Induc-
tance Sat.
(LqSat)
0.000–1000.000 mH
Size related
This parameter corresponds to the inductance saturation of
Lq. Ideally, this parameter has the same value as parameter
1-38 q-axis Inductance (Lq). However, if the motor supplier
provides an induction curve, enter the induction value,
which is 200% of the nominal current.
Parameter 1-46
Position Detec-
tion Gain
20–200%
100%
Adjusts the height of the test pulse during position detec-
tion at start.
Parameter 1-48
Current at Min
Inductance for
d-axis
20–200%
100%
Enter the inductance saturation point.
Parameter 1-49
Current at Min
Inductance for
q-axis
20–200%
100%
This parameter specifies the saturation curve of the d- and q-
inductance values. From 20–100% of this parameter, the in-
ductances are linearly approximated due to parameter 1-37
d-axis Inductance (Ld), parameter 1-38 q-axis Inductance (Lq),
parameter 1-44 d-axis Inductance Sat. (LdSat), and parameter
1-45 q-axis Inductance Sat. (LqSat).
Parameter 1-70
PM Start Mode
[0] Rotor Detection
[1] Parking
[3] Rotor Last Position
[1] Parking
Select the PM motor start mode.
Parameter 1-73
Flying Start
[0] Disabled
[1] Enabled
[0] Disabled
Select [1] Enabled to enable the drive to catch a spinning mo-
tor.
Parameter 3-41
Ramp 1 Ramp
Up Time
0.05–3600.0 s
Size related
Ramp-up time from 0 to rated parameter 1-23 Motor Frequen-
cy.
Parameter 3-42
Ramp 1 Ramp
Down Time
0.05–3600.0 s
Size related
Ramp-down time from rated parameter 1-23 Motor Frequency
to 0.
AQ367426199594en-000101 / 130R0988 | 39Danfoss A/S © 2021.06
Programming
VLT® HVAC Drive FC 131
Operating Guide