Functional Block Diagrams; Open-Loop Vector Control; Flux Vector Control - YASKAWA FSDrive-MV1S Instructions Manual

Functional Block Diagrams

The Inverter functional block diagrams for open-loop vector control and flux vector control are shown
below.

Open-loop Vector Control

U1-01
Speed reference
(Fref)
Soft starter
C1-01
C2-01

Flux Vector Control

U1-01
Speed reference
(Fref)
B1-05
-2
10
U1-09 Torque reference(Tref)
Soft starter output
Torque
U1-20
limit
+
Torque current reference (Iqref)
Speed
SFS
control
−
IM
C4-01 L7-01
to C1-11 to to
C4-02
L7-04
E2-03
to C2-04
No-load current
Flux reference
φ
*
Slip
calculation
C3-01 to
+
Frequency
control
−
N2-01 to
BB
E1-09
zero-speed
Fmin limit
Torque compensation
Soft starter output
Torque
U1-20
limit
+
Speed
SFS
− control
Soft starter
C5-01 L7-01
C1-11 to to
C1-01 to
C5-08 L7-04
to C2-04
C2-01
Flux reference
q-axis current control output
U1-64
+
−
U1-65
current
Excitation current reference
control
+
(Idref)
−
V/F constants
E1-04 E1-13
Slip(Fs)
V/f
compensation
φ
U1-52 *
Flux
Output frequency
+
(Fout)
+
U1-53 U1-02
C3-03
Motor speed (N)
U1-05
U1-19
Actual excitation
N2-05
U1-18
(Tcomp)
U1-51
U1-09
÷
Torque reference (Tref)
U1-64
Torque current reference
+
+ +
(Iqref)
−
U1-65
Excitation current
reference (Idref)
IM
V/F constants
E2-03
E1-04 to E1-13
No-load current
φ Slip (Fs)
V/f
*
φ
*
U1-52
Flux
+
Slip
calculation
+
U1-53
Motor speed (N)
U1-05
(Vq,Vd)
U1-26,27
Output voltage
U1-32
reference (Vref)
+
U1-06
d-q
U1-33
+
Vector
calculation
Input voltage
d-axis current
control output
EMF
PWM
+
dt
+
PWM
voltage
correction
U1-03
Output current (I1)
current (Id)
d-q
Coordinates
Actual torque
current (Iq) conversion
q-axis current
(Vq,Vd)
control output
U1-26, 27
Output voltage
U1-32
reference (Vref)
+
U1-06
d-q
U1-33 +
Vector
current
+ calculation
control
−
d-axis current
control output
EMF
PWM
compensation
Output frequency
+
(Fout)
dt
+
U1-02 PWM
voltage
correction
U1-03
U1-19
Output current (I1)
Actual excitation
current (Id)
d-q
U1-18
Coordinates
Actual torque
current (Iq) conversion
Power
supply
U1-90
(Vin)
Inverter
U1-78
Output
voltage
(Vout)
IM
Power
supply
U1-90
Input voltage
(Vin)
Inverter
U1-78
Output
voltage
(Vout)
IM
PG