LSIS LSLV-S100 - Sensorless Vector Control for PM (Permanent-Magnet) Synchronous Motors

194
Learning Advanced Features
Problem
Relevant function code
Troubleshooting
increments/decrements of 5% (set below
100%).
The motor hunts when
the load increases from
the base frequency or
higher.
Cn.22 ASR-SL I Gain1
Cn.23 ASR-SL I Gain2
Increase the value of Cn.22 by increments of
50m/s or decrease the value of Cn.24 by
decrements of 5%.
The motor hunts as the
load increases.
Cn.28 S-Est P Gain1
Cn.29 S-Est I Gain1
At low speed (10Hz or lower), increase the
value of Cn.29 by increments of 5.
At mid speed (30 Hz or higher), increase the
value of Cn.28 by increments of 500. If the
parameter setting is too extreme, over
current trip may occur at low speed.
The motor speed level
decreases.
bA.20 Auto Tuning
Select 6. Tr (static type) from bA. 24 and run
bA.24 Rotor time constant tuning.
*Hunting: Symptom of irregular vibration of the equipment.
5.11 Sensorless Vector Control for PM (Permanent-
Magnet) Synchronous Motors
Sensorless vector control is an operation that carries out vector control without rotation
speed feedback from the motor but, instead, with an estimation of the motor rotation speed
calculated by the inverter.
Group
Code
Name
LCD Display
Parameter Setting
Setting Range
Unit
dr
09
Control mode
Control Mode
6
PM Sensorless
-
-
14
Motor capacity
Motor
Capacity
Depends on the
motor capacity
0–15
-
18
Base frequency
Base Freq
Depends on the
PM motor capacity
30–180
Hz
20
Maximum
frequency
Max Freq
Depends on the
PM motor capacity
40–180
Hz
bA
11
Motor pole number
Pole Number
4
2–48
-
13
Rated motor
current
Rated Curr
Depends on the
motor capacity
1–1000
A
15
Motor-rated voltage
Rated Volt
220/380/440/480
170–480
V
16
Motor efficiency
Efficiency
Depends on the
motor capacity
64–100
%
19
Motor input voltage
AC Input Volt
220/380
170–480
20
Auto tuning
Auto Tuning
7
All (PM)
-
32
Q-axis inductance
scale
Lq (PM) Scale
100%
50–150
%
34
Auto tuning level for
Ld,Lq Tune
33.3%
20.0–50.0
%