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Stabilizing Speed (Speed Feedback Detection Function)
The speed feedback detection control (AFR) function measures the stability of the speed when a load is sud-
denly applied, by calculating the amount of fluctuation of the torque current feedback value, and compensat-
ing the output frequency with the amount of fluctuation.
Related Parameters
Name
Param-
eter
Number
Display
Set the internal speed feed-
back detection control gain
Speed feed-
using the multiplication
back detec-
function.
tion control
Normally, there is no need to
(AFR) gain
make this setting.
Adjust this parameter as fol-
N2-01
lows:
• If hunting occurs, increase
the set value.
• If response is low,
AFR Gain
decrease the set value.
Adjust the setting by 0.05 at
a time, while checking the
response.
Speed feed-
back detec-
Set the time constant to
tion control
decide the rate of change in
N2-02
(AFR) time
the speed feedback detec-
constant
tion control.
AFR Time
Speed feed-
back detec-
Set the time constant to
tion control
N2-03
decide the amount of change
(AFR) time
in the speed.
constant 2
AFR Time 2
Setting
Description
Range
0.00 to
10.00
0 to
2000
0 to
2000
Improved Operating Efficiency
Control Methods
Change
Factory
during
V/f
Open
Setting
Opera-
V/f
with
Loop
tion
PG
Vector
1.00
No
No
No
50 ms
No
No
No
750 ms
No
No
No
Regis-
Flux
ter
Vec-
tor
A
No
584H
A
No
585H
A
No
586H
6-
49
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Troubleshooting
