Stabilizing Speed (Speed Feedback Detection Function) - YASKAWA CIMR-G7U Technical Manual

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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
Parameter
Number
Speed
Feedback
Detection
Control (AFR)
Gain
n2-01
AFR Gain
Speed
Feedback
Detection
n2-02
Control (AFR)
Time Constant
AFR Time
-38
6
Name
Description
Display
Sets the internal speed feedback
detection control gain in the
automatic frequency regulator
(AFR).
Normally, there is no need to
change this setting. 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 units
at a time, while checking the
response.
Sets the time constant to control
the rate of change in the speed
feedback detection control.
Change
Setting Factory
during
Range Setting
V/f
Operation
0.00
to 1.00 No No
10.00
0
to 50ms No No
2000
Control Methods
Open Open
V/f
Loop Flux Loop
with
Vector Vector Vector
PG
1 2
No A No No
No A No No