Mitsubishi Electric FR-A800 Series Instruction Manual page 221

Block diagram of Real sensorless vector control
Z
*
+
-
Z FB
Block diagram of Vector control
I 2
Z
*
+
-
Z FB
220
5. PARAMETERS
5.2 Control method
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Magnetic
I 2
id
* +
flux
control
-
id
iq
Speed * +
control
Z 0
+
Z FB
+
Z s
iq
Slip
calculation
I 2
Speed estimation
Magnetic *
id
+
flux
control
-
id
*
iq
+
Speed
control
-
iq
+ ω 0
Z FB
+
Z s
iq
Slip
calculation
I 2
search engine
Pre-excitation
Vd
current
control
Torque
Vq
current
control
-
iq
iq
Magnetic
id
flux
Vd
calculation
Vq
Pre-excitation
Vd
current
control
Torque
Vq
current
control
id
iq
Magnetic
id
flux
calculation
PWM
modulation
Output
voltage
conversion
Z 0
id
Current
iq
conversion
Encoder
PWM
modulation
Output
voltage
conversion
Z 0
Current
conversion
M
M