Parameters
Control method
FR-A800
5 - 59
Motor-generated torque (TM), slip angular velocity (ωs) and the motor's secondary magnetic flux (Ф2)
can be found by the following calculation:
TM
∼
Ф2 × iq
Ф2 = M × id
ωs = (r2/L2 × iq/id), where L2: secondary inductance
L2 = l2
+ M
Vector control provides the following advantages:
●
Excellent control characteristics when compared to V/F control and other control techniques,
achieving the control characteristics equal to those of DC machines.
●
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.
●
Allows torque control (when induction motors are used).
●
Allows servo-lock torque control which generates a torque in the motor shaft while stopped. (Not
available under Real sensorless vector control.
I002502E
Fig. 5-4:
Block diagram of Real sensorless vector control
ω
∗
ω
FB
-
+
+
-
iq
id
Vq
Vd
ω
0
ω
s
iq
φ
2
id
φ
2
id
ω
FB
+
-
iq
ω
0
+
+
iq
id
∗
iq
∗
Vq
Vd
Magnetic
flux
control
Speed
control
Slip
calculation
Speed estimation
PWM
modulation
Pre-
excitation
current
control
Torque
current
control
Output
voltage
conversion
Current
conversion
Magnetic
flux
calculation
IM
Summary of Contents for FR-A820-00046 (0.4K)
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Page 144: ...System configuration for Ethernet communication FR A800 E Installation and wiring 2 114 ...
Page 202: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 1090: ...Check first when you have a trouble Protective functions 6 50 ...
Page 1189: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1190: ...EC Declarations of Conformity Appendix A 50 ...
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Page 1212: ...EC Declarations of Conformity Appendix A 72 A 7 2 FR A846 series ...
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