95
4. Control Method
4.1 Vector control and Real sensorless vector control
1
2
3
4
5
6
7
8
9
10
• It is applicable to fast response applications with which induction motors were previously regarded as difficult to use.
Applications requiring a wide variable-speed range from extremely low speed to high speed, frequent acceleration/
deceleration operations, continuous four-quadrant operations, etc.
• Torque control is enabled (when an induction motor is used).
• It allows servo-lock torque control which generates a torque in the motor shaft while stopped. (Not available under Real
sensorless vector control.)
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
I M
ω
FB
+
-
iq
ω
0
+
+
iq
id
*
Speed estimation
iq
*
Vq
Vd
Block diagram of Real sensorless vector control
Summary of Contents for FR-E800
Page 17: ...16 1 Introduction 1 3 Related manuals MEMO ...
Page 51: ...50 2 Basic Operation 2 8 I O terminal function assignment MEMO ...
Page 89: ...88 3 Parameters 3 4 Parameter list by function group number MEMO ...
Page 135: ...134 5 Speed Control 5 9 Troubleshooting in the speed control MEMO ...
Page 153: ...152 6 Torque Control 6 7 Troubleshooting in torque control MEMO ...
Page 195: ...194 8 E Environment Setting Parameters 8 18 Current average value monitor signal MEMO ...
Page 237: ...236 10 D Operation Command and Frequency Command 10 6 Operation by multi speed setting MEMO ...
Page 339: ...338 13 T Multi Function Input Terminal Parameters 13 9 Start signal operation selection MEMO ...
Page 455: ...454 16 G Control Parameters 16 13 Speed smoothing control MEMO ...