Stabilizing Speed (Speed Feedback Detection Function) - YASKAWA CIMR-ACA4011 Instruction Manual

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 compensating
the output frequency with the amount of fluctuation.
Related Parameters
Name
Parameter
Number
Display
Speed Feedback
Detection Control
(AFR) Gain
n2-01
AFR Gain
Speed Feedback
Detection Control
(AFR) Time Con-
n2-02
stant
AFR Time
Speed Feedback
Detection Control
(AFR) Time Con-
n2-03
stant 2
AFR Time 2
Description
Set the internal speed feedback detection con-
trol gain using the multiplication function.
Normally, there is no need to make this set-
ting.
Adjust this parameter as follows:
• If hunting occurs, increase the set value.
• If response is low, decrease the set value.
Adjust the setting by 0.05 at a time, while
checking the response.
Set the time constant to decide the rate of
change in the speed feedback detection con-
trol.
Increase the setting if overvoltage (OV) fail-
ures occur at the completion of acceleration or
when the load changes radically.
Improved Operating Efficiency
Control Methods
Change
Setting
Default during
Range
V/f
Run
0.00 to
1.00 No No
10.00
0 to
100 ms No No
2000
0 to
750 ms No No
2000
Open
Flux
Loop
Vector
Vector
A No
A No
A No
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