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47
Main speed setting
3.9.5
Speed control proportional gain selection based on winding diameter compensation result
(Pr. 775 to Pr. 780)
Speed control proportional gain at vector control and Real sensorless vector control can be changed based on a winding
diameter calculation result.
This function activates when
two or more settings of
Pr. 777 to Pr. 780 (speed control proportional gain 1 to 4)
are set.
If two or more setting are not set,
Pr. 820 Speed control P gain 1
is valid with RT signal OFF,
Pr. 830 Speed control P gain 2
is
valid when RT signal ON.
Pr. 777 to Pr. 780
can be set disabled with the speed control proportional gain disabled signal (X93).
A machine operates at 33% when
Pr. 775 Speed control proportion term applied diameter 1
= "9999", at 66% when
Pr. 776 Speed
control proportion term applied diameter 2
= "9999." When
Pr. 775
=
Pr. 776
, bigger value between proportional gain 3 and
proportional gain 4 is valid. Below graph shows the value of speed control proportional gain when two settings are made.
Parameter
Number
Name
Setting Range
Increments
Initial Value
775
Speed control proportion term applied diameter 1
0 to 100%, 9999
1%
9999
776
Speed control proportion term applied diameter 2
0 to 100%, 9999
1%
9999
777
Speed control proportional gain 1
0 to 1000%, 9999
1%
9999
778
Speed control proportional gain 2
0 to 1000%, 9999
1%
9999
779
Speed control proportional gain 3
0 to 1000%, 9999
1%
9999
780
Speed control proportional gain 4
0 to 1000%, 9999
1%
9999
X1 =
((Maximum winding diameter - minimum winding diameter)
Pr. 775
/100) + minimum winding diameter
X2 =
((Maximum winding diameter - minimum winding diameter)
Pr. 776
/100) + minimum winding diameter
Winding diameter calculation
X93
Speed control gain
Disable
OFF
Pr. 820/Pr. 830
Disable
ON
Pr. 820/Pr. 830
Enable
OFF
Pr. 777 to Pr. 780
Enable
ON
Pr. 820/Pr. 830
Pr. 721
(Pr. 723, Pr. 725, Pr. 727)
Min. diameter
Pr. 720
(Pr. 722, Pr. 724, Pr. 726)
Max. diameter
Empty
Whole
Medium
Pr. 780
(Proportional gain 4)
Speed control
Proportional (P) term
Gain (%)
Pr. 779
(Proportional gain 3)
Pr. 778
(Proportional gain 2)
Pr. 777
(Proportional gain 1)
Winding diameter [mm]
X1
X2
Pr. 721
(Pr. 723, Pr. 725, Pr. 727)
Min. diameter
Pr. 720
(Pr. 722, Pr. 724, Pr. 726)
Max. diameter
Empty
Whole
Medium
Pr. 780
(Proportional gain 4)
Speed control
proportional (P) term
gain (%)
Pr. 779
(Proportional gain 3)
Winding diameter [mm]
X1
X2