6.4 Flux Vector Control
6-37
D
Figure 6.15 shows how the proportional gain and integral time approach the ASR proportional gain
2 and ASR integral time 2 linearly.
P, I
0
C5-07
Motor speed (Hz)
P= C5-01
I = C5-02
P= C5-03
I = C5-04
(Low speed)
If C5-07 is set to 0.0, ASR proportional gain 1 and ASR integral
time 1 are used for the proportional gain and integral time at all
frequencies.
Fig 6.15 Gain Settings at Low Frequencies
J
Multi-function Input Settings: H1-01 (Terminal 3) to H1-06 (Terminal 8)
ASR Integral Reset Setting: “E”
D
When one of the multi-function inputs is set to “E,” the input can be used to switch the speed control
loop between P control and PI control.
D
P control (integral reset) is used when the multi-function input is ON.
ASR Proportional Gain Switch Setting: “77”
D
When one of the multi-function inputs is set to “77,” the input can be used to switch between propor-
tional gain 1 and proportional gain 2.
D
Proportional gain 2 (C5-03) is used when the multi-function input is ON. This input has higher priority
than the ASR switching frequency set in C5-07.
ASR Gain Switch
signal (a multi-func-
tion input)
Proportional gain
(P)
ON
OFF
C5-02
Proportional gain
determined by mo-
tor speed.
C5-03 gain setting
C5-02
The gain is changed linearly in integral time 1 (C5-02). The integral
time setting isn’t switched.
Fig 6.16 ASR Proportional Gain Switch
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Speed Control (ASR) Responsiveness: C5-06
User
Change
Valid Access Levels
Constant
Number
Name
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
C5-06
ASR primary delay
time
×
0.000 to
0.500
s 0.004
× × ×
A
D
Normally it isn’t necessary to make this adjustment.
D
Constant C5-06 can be used when adjusting the gain doesn’t remove motor oscillation, or adjusting
the gain removes oscillation but results in poor responsiveness.
D
A high C5-06 setting lowers the responsiveness of the speed control, but makes it difficult for oscilla-
tion to occur.
6
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