V/F + Pg Control; Slip Compensation; Auto-Tuning Of Motor Constant - LG SV-iS5 Instruction Manual

3) V/F + PG control

If FU2-39 [control mode] is set to V/F with PG (encoder) feedback using SUB-B board, the control type is automatically
changed to V/F + PG. The following parameters should be set accordingly to enable PG feedback using SUB-B board.
Parameter Name
Usage of Pulse Input
Signal
Pulse Signal Input
Selection
Encoder Pulse
Number
P-Gain for ' Sub-B'
I-Gain for ' Sub-B'
Slip Frequency for
' Sub-B' Board

4) Slip compensation

Operation is done via Slip compensation if FU2-39 is set to 1 {Slip compen}. This control keeps motor speed constant
regardless of load change.
5) Auto -tuning of motor constant
This parameter enables auto-tuning of the motor constants. If set to 1 {All mode}, tuning type varies according to what
control mode is set in [FU2-39]. Auto-tuning can be done in two ways – one is motor non-rotation mode, the other is
motor rotation mode.
① Auto-tuning by non-rotation mode: Rs+Lsigma
② Auto-tuning by rotation mode: All, Enc Test, Tr
Before performing Auto-tuning, set motor rating, motor parameter in common setting and select the desired control
mode in FU2-39 [control mode selection]. However, when auto-tuning parameters related to encoder, detail functions
settings of vector control should be pre-defined. If Enc Test, Tr and control mode are set to vector control, Sub-B board
should be mounted.
Parameter Name
Auto-tuning
Parameter value
display
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Code
Defines the use of pulse input signal with SUB-B
EXT -12
mounted. This parameter should be set to 1 {Feed-back}.
Three types of input signal settable;
EXT -15
(A+B), A, -(A+B)
EXT -16 Defines the number of encoders of the motor.
EXT -22, EXT -23 PI gains for PI controller during PG operation
EXT -24 Set as a percent of FU2-32 [Rated Motor Slip].
Code
No, All, Rs+Lsigma, Enc Test, Tr
FU2-40
Tuned value monitoring
FU2-34,
(No-load current, stator/rotor resistance, leakage
FU2-41 ~ 44
inductance, rotor filter time constant)
Chapter 3 – Function Settings
Description
Description
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