Yaskawa Matrix Converter - Manual (Page 150)

5
-50
‹ n: Special Adjustments
The following settings are made with the special adjustments parameters (N parameters): Hunting prevention,
speed feedback detection control, and feed forward control.
„ n1: Hunting Prevention Function
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control
Methods MEMO-
BUS
Register
Page
Display V/f
Open
Loop
Vector
Flux
Vector
n1-01
Hunting Preven-
tion Selection 0: Hunting-prevention function disabled
1: Hunting-prevention function enabled
The hunting-prevention function sup-
presses hunting when the motor is operat-
ing with a light load.
This function is enabled in V/f Control
method only.
If high response is to be given priority
over vibration suppression, disable the
hunting-prevention function.
0 or 1 1 No A No No 580H 6-36
Hunt Prev Select
n1-02
Hunting Preven-
tion Gain Setting Set the hunting-prevention gain multipli-
cation factor.
Normally, there is no need to make this
setting.
Adjust this parameter as follows:
• If vibration occurs with light load,
increase the setting.
• If the motor stalls, reduce the setting.
If the setting is too large, the voltage will
be too suppressed and the motor may
stall.
0.00 to
2.50
1.00 No A No No 581H
4-14
6-36
Hunt Prev Gain
n1-03
Hunting Preven-
tion Time Con-
stant
Set the hunting-prevention primary delay
time in units of ms.
0 to 500 10 ms No A No No 582H 6-36
Hunt Prev Time