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Control mode
Block diagram of Real sensorless vector control
Block diagram of vector control
PWM
modulation
output
voltage
conversion
torque
current
control
speed
control
slip
calculation
current
conversion
pre-excitation
current
control
magnetic
flux
control
ω
*
ω
FB
-
+
+
-
iq
*
id
Vq
Vd
ω
0
ω
s
iq
φ
2
id
φ
2
id
*
IM
ω
FB
+
-
iq
ω
0
+
+
iq
id
speed estimation
calculation
flux
magnetic
iq
Vd
Vq
PWM
modulation
output
voltage
conversion
torque
current
control
speed
control
slip
calculation
current
conversion
pre-excitation
current
control
magnetic
flux
control
magnetic
flux
calculation
ω
*
ω
FB
-
+
+
-
iq
*
id
Vq
Vd
ω
0
ω
s
iq
φ
2
id
φ
2
id
*
IM
Encoder
ω
FB
+
-
iq
ω
0
+
+
iq
id