Fu2-45: P Gain For Sensorless Control; Fu2-46: I Gain For Sensorless Control - LG SV-iS5 Instruction Manual

FU2-40 LCD display
0 No
1 All
2 Rs + Lsigma
3 Enc Test
4 Tr
☞ Note 1: Ls and Noload-Curr are only valid during Motor
Rotation mode.
☞ Note 2: The motor constants values change with
temperature change, so auto tuning is to be conducted
after the temperature of the motor is stabilized.
☞ Note 3: The auto-tuning result could be different unless
LG motor is used.
☞ Note 4: The actual motor parameters (Rs, Rr, Lsigma,
Tr) can be used or set by user.
Code LCD display
No Load
FU2-
Noload-Curr
34 Current
(RMS)
FU2-
Auto tuning Auto Tuning
40
FU2- Stator
Rs
41 resistance
FU2- Leakage
Lsigma
42 inductance
FU2- Stator
Ls
43 inductance
FU2-
Tr
44 constant
[Keypad display during Auto-tuning of motor parameters]
Display
Code
LED 7-Seg.
T1
Rs Tuning
T2
Lsigma
Tuning
FU2-
T3
40
Ls Tuning
T4
ENC Test
T5
Tr Tuning
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Description
Auto-tuning disabled
Auto-tuning all
parameters
Stator resistance (Rs)
and Leakage inductance
(Lsigma) Auto- tuning
PG status check
Rotor constant(Tr)
calculation
Name Description
Setting and display the
Motor
No Load Motor Current
(RMS)
Auto-tuning enable
Setting and display the
Stator resistance Rs
Setting and display the
Lsigma
Setting and display the
Stator inductance Ls
Rotor Setting and display the
Rotor constant Tr.
Description
Displayed during Stator
resistance (Rs) Auto- tuning
Displayed during Leakage
inductance (Lsigma) auto-
tuning.
Displayed during Stator
inductance (Ls) and No-load
current auto- tuning.
Displayed during Encoder auto-
tuning.
Displayed during Rotor filter
time constant (Tr) auto- tuning
Chapter 6 - Parameter Description [FU2]
[Keypad error display after Encoder test]
Display
Code
LED 7-Segment
Enc Err
FU2-
40
Enc Rev
[Motor parameter display corresponding to inverter
capacity]
inverter
Class
capacity
0.8[kW] ~
5.5[kW]
200V
7.5[kW] ~ 55[kW]
0.8[kW] ~
1.5[kW]
400V
2.2[kW] ~ 15[kW]
18.5[kW] ~
75[kW]
☞ Note: For 7-segment Keypad, parameter unit is not
displayed.
Related Functions: FU2-30~37 [Motor related parameters]
FU2-39 [Control mode selection]
EXT-01 [Sub Board Type Display]
EXT-14 [Encoder Feedback Frequency]
EXT-15 [Pulse Input Signal Selection

FU2-45: P Gain for Sensorless Control

FU2-46: I Gain for Sensorless Control

FU2? SL P-gain
45 1000
Factory Default:
1000
SL P-gain is the proportional gain of speed controller. If
this value is set high, you can get fast speed response
characteristic. However, if this value is set too high, the
steady state characteristics may become unstable.
FU2? SL I-gain
46 100
Factory Default:
100
SL I-gain is the integral gain of speed controller. If this
value is set low, you can get better transient response
characteristic and steady state characteristic . However,
if this value is set too low, there may be an overshoot in
speed control.
109
Description
T6 Displayed when incorrect
Encoder wiring error occurs
T7 Displayed when Encoder
wiring is connected reversly.
Motor parameter
Rs Lsigma Ls Tr
X.XXX X.XX X.XX
ohm mH mH
X.X X.XXX X.XX
mohm mH mH
X.XX
X.X mH X. mH
ohm
X.XXX X.XX
X.X mH
ohm mH
X.X X.XXX
X.XX
mohm mH
]
45 1000
1000
46 100
100
XXX
ms
XXX
ms
XXX
ms
XXX
ms
XXX
ms