LG SV-iS5 Instruction Manual page 111

[Stator Resistance], FU2-43 [Rotor Resistance], and
FU2-44 [Leakage Inductance].
If you know the motor parameters, set the values in the
relevant codes for better control performance.
FU2? Pole number
31 4
Factory Default:
4
This is used to display the motor speed. If you set this
value to 2, inverter will display 3600 rpm instead
1800rpm at 60Hz output frequency. (See motor
nameplate)
FU2? Rated-Slip
32 3.00 Hz
Factory Default:
3.00 Hz
This is used in ' Slip Compensation' control. If you set
this value incorrectly, motor may stall during slip
compensation control. (See motor nameplate)
FU2? Rated-Curr
33 3.6 A
Factory Default:
3.6 A
(This value is set according to the motor capacity set in FU2-30)
This is very importance parameter that must be set
correctly. This value is referenced in many other inverter
parameters. (See motor nameplate)
FU2? Noload-Curr
34 1.8 A
Factory Default:
1.8 A
(This value is set according to the motor capacity set in FU2-30)
This parameter is only displayed when ' Slip Compen' is
selected in FU2-40 [Control Method].
This function is used to maintain constant motor speed.
To keep the motor speed constant, the output frequency
varies within the limit of slip frequency set in FU2-32
according to the load current. For example, when the
motor speed dec reases below the reference speed
(frequency) due to a heavy load, the inverter increases
the output frequency higher than the reference
frequency to increase the motor speed. The inverter
increases or decreases the output by delta frequency
shown below.
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31 4
4
32 3.00
3.00
33 3.6
3.6
34 1.8
1.8
105
Chapter 6 - Parameter Description [FU2]
Output current – No load current
Delta
=
Freq.
Rated current – No load current
Output frequency = Reference freq. + Delta freq.
FU2? Motor Volt
35 %
Factory Default:
%
(This value is set according to the motor capacity set in FU2-30)
FU2? Efficiency
36 72 %
Factory Default:
72%
(This value is set according to the motor capacity set in FU2-30)
This value is used for calculating the output wattage
when FU2-72 is set to ' Watt' .
FU2?Inertia rate
37 0
Factory Default:
0
This parameter is used for sensorless control, minimum
Accel/Decel, optimum Accel/Decel and speed search.
For better control performance, this value must be set as
exact as possible.
Set ' 0' for loads that has load inertia less than 10 times
that of motor inertia.
Set ' 1' for loads that have load inertia about 10 times
that of motor inertia.
×
Rated Slip
35 -
-
36 72
72
37 0
0