Speed Control (Asr) Structure - YASKAWA Varispeed G7 Series Instruction Manual



Speed Control (ASR) Structure

Speed control (ASR) during vector control adjusts the torque reference so that the deviation between the
speed reference and the estimated speed (PG feedback or speed estimator) is 0. Speed control (ASR) during V/
f control with a PG adjusts the output frequency so that the deviation between the speed reference and the esti-
mated speed (PG feedback or speed estimator) is 0. The following block diagram shows the structure of the
speed control for vector or V/f control with a PG.
Detected speed
Estimated speed
Detected speed
Related Constants
Con-
stant
Number
C5-01
C5-02
-138
6
C5-01, C5-03
+
Frequency
P
reference
−
C5-02, C5-04
Speed Control Block Diagram for Vector Control
Frequency
reference
+
−
Change
rate
limiter
Speed Control Block Diagram for V/f Control with a PG
Fig 6.73 Speed Control Block Diagrams
Name
Description
Display
ASR propor-
tional (P)
Sets the proportional gain of the speed
gain 1
loop (ASR.)
ASR P Gain
1
ASR inte-
gral (I) time
Sets the integral time of the speed loop
1
(ASR) in 1-second units.
ASR I Time
1
+
Primary
filter
+
I
I
C5-06
limit
(C5-10)
C5-08
+
P
+
I
C5-01
C5-03
C5-02, C5-04
Setting Factory
Range Setting
0.00 to
20.00
300.00
*1
*2
0.000
0.500
to
s
10.000
Torque limits
Torque reference
L7-01 to L7-04
Output frequency
+
+
Limit
C5-05
Control Methods
Change
Open
during
V/f Loop Flux
Opera-
V/f with Vec- Vec-
tion
PG tor tor
1
Yes No A No
Yes No A No
*1
MEMO
Open
BUS
Loop
Reg-
Vec-
ister
tor
2
A A 21BH
A A 21CH