Individual Functions
6-135
îš‹ Speed Control (ASR) Structure
Speed control (ASR) during V/f control with a PG adjusts the output frequency so that the deviation between
the speed reference and the estimated speed (PG feedback) is 0.
The following block diagram shows the structure of the speed control for open-loop vector or V/f control with
a PG.
Fig 6.69 Speed Control Block Diagrams
îš„Related Constants
Con-
stant
Num-
ber
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
C5-01
ASR pro-
portional
(P) gain 1
Sets the proportional gain of the speed
loop (ASR.)
1.00 to
300.00
*1
20.00
*2
Yes No A No A 21BH
C5-02
ASR inte-
gral (I) time
1
Sets the integral time of the speed loop
(ASR) in 1-second units.
0.000
to
10.000
0.500 s
*2
Yes No A No A 21CH
Speed control (ASR) during flux vector control adjusts the torque reference so that the deviation between the
speed reference and the estimated speed (PG feedback) is 0.
Frequency
reference
Detected speed
P
I
Torque limits
Torque reference
+
+
+
−
Speed Control Block Diagram for Open-loop Vector Control
Frequency
reference
Detected speed
P
I
Change
rate
limiter
Limit
+
+
+
−
Speed Control Block Diagram for V/f Control with a PG
+
+
Output frequency
C5-01, C5-03
C5-02, C5-04
C5-06
I
limit
C5-08
Primary
filter
L7-01 to L7-04
C5-01
C5-03
C5-02, C5-04
C5-05
(C5-10)
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