YASKAWA Varispeed G7 Series Instruction Manual page 531

Control Block Diagram for Open-loop Vector 1 Control
Acceleration and
deceleration times
C1-01 C1-02
Frequency
d2-01 to d2-03
reference
U1-01
E1-09
Speed
Soft starter
reference
fref
Stall prevention processing
(acceleration and deceleration
rate correction)
L3-01 to L3-04
calculation
N2-01
Torque limit 1
tlim1
Torque limit 2
tlim2
Torque limit
Torque limit 3
selection circuit
tlim4
Torque limit 4
tlim5
Fig 10.24 Control Block Diagram for Open-loop Vector 1 Control (A1-02 = 2)
Control Block Diagram for Flux Vector Control
Acceleration and
deceleration times
C1-01 C1-02
N5-02
Frequency
d2-01 d2-03
N5-03
reference to
U1-01
SFS output
E1-09
U1-20
f0
Speed
Soft starter
reference
fref
Stall prevention processing
(deceleration rate correction)
L3-04
Zero-servo
b9-01 b9-02
Torque limit 1
tlim1
Torque limit 2
tlim2
Torque limit
Torque limit 3 selection circuit
tlim4
Torque limit 4
tlim5
Fig 10.25 Control Block Diagram for Flux Vector Control (A1-02 = 3)
−
1
ST
+
SFS output
U1-20
C4-01 C4-02
−
f0
k
1+ST
+
+
+
E1-04
to
E1-13
V/f
pattern
+
Speed
(AFR) −
Motor speed
(estimated)
+
N2-02 U1-05
−
*
fs
Slip
compensation
C3-01 to C3-04
Reverse
Forward
b7-01 b7-02
Drooping
(Integral
ASR input short-circuit)
U1-21
Feedforward IRST
control
−
+
+
ASR
+ −
+
C5-01
U1-22
ASR output
C5-04
fnfb
E1-04
Multi-function
Field forcing
E1-13
input = 72
V/f
pattern
fs
Slip frequency
calculation
C3-01 E2-02
Reverse
Forward
Motor speed
U1-05
Torque reference tro
U1-09
Torque limit
L7-01 L7-04
to
φ *
×
*
iq
*
e
*
id
IM
E2-03
Motor
excitation
current
U1-19
idfb
Torque current
iqfb
compensation
U1-18
Motor secondary
current
Torque reference tro
U1-09
Torque limit
L7-01 L7-04
to
φ *
×
N5-01
1
1+ST
C5-06
+
IM
+
E2-03
d6-03
+ fout
+
*
Control Block Diagrams
C6-02 C6-03
IM
Inverter
Vector
calculator
fout
U1-02
Output frequency
C6-02 C6-03
*
iq
IM
Inverter
PG
*
id
Vector
calculator
*
e
U1-02
Output frequency
Motor excitation
current
U1-19
idfb
iqfb
U1-18
Motor secondary current
Speed
detector
10
43
10-