LG C Series - Manual (Page 90)

10. Advanced functions
10.9 Sensorless vector control
Group LED Display Parameter Name
Set
value
Min/Max
Range
Factory
Defaults
Unit
H40 [Control mode select] 3 0/3 0 -
H30
[Motor type select]
- 0.2/2.2 - kW
H32
[Rated
slip frequency]
- 0/10 - Hz
H33
[Motor rated current]
- 1.0/12 - A
H34
[Motor No Load Current]
- 0.1/12 - A
H42
[Stator resistance (Rs)]
- 0/14.0 - Ω
H44
[Leakage inductance
(L
σ)]
- 0/300.00 - mH
Function
group 2
F14
[Time for energizing a
motor]
- 0.0/60.0 1.0 Sec
ƒ If H40 – [Control mode select] is set to 3, Sensorless vector control will become active.
Caution :
Motor parameters should be measured for high performance. It is highly recommended H41 –
[Auto tuning] be done prior to proceeding operation via Sensorless vector control.

Ensure that the following parameters are entered correctly for high performance in
Sensorless vector control.

H30: Select motor type connected to inverter output.

H32: Enter rated slip frequency based on motor nameplate RPM and rated frequency.
 H33: Enter motor nameplate rated current.
 H34: After removing the motor load, select H40 – [Control mode select] to 0 {V/F
control} and run the motor at 60Hz. Enter the current displayed in Cur-[Output current]
as motor no load current. If it is difficult to remove the load from the motor shaft, enter
the value either 40 to 50% of the H33 – [Motor rated current] or the factory default.

H42, H44: Enter the value of the parameter measured during H41 – [Auto tuning] or the
factory default.

F14: This parameter accelerates the motor after pre-excitating the motor for the set time.
The amount of the excitating current is set in H34- [Motor no load current].
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