Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Parameter Torque control by real sensorless vector control, vector control
FR-A700 EC 6 - 117
6.4.5 Speed limit (Pr. 807 to Pr. 809)
Set the speed limit value to prevent overspeed of the motor in case the load torque becomes less
than the torque command value, etc. during torque control operation.
Control block diagram
Pr.
No.
Name
Initial
Value
Setting Range Description Parameters referred to
Refer to
Section
807
Speed limit selection 0
0
Use the speed command value dur-
ing speed control as speed limit.
1
2
7
8
13
4–6
24–27
232–239
868
125
126
C2–C7
C12–C15
Maximum
frequency,
Minimum
frequency
Acceleration time
Deceleration time
Starting frequency
Multi-speed
operation
Terminal 1 func-
tion assignment
Frequency setting
voltage (current)
bias/gain
6.8.1
6.8.1
6.11.1
6.11.1
6.11.2
6.10.1
6.3.2
6.20.5
1
According to Pr. 808 and Pr. 809 ,
set the speed limit in forward and
reverse rotation directions individu-
ally.
2
Forward/reverse rotation speed limit
The analog voltage of the terminal 1
input is used to make speed limit.
The speed limit of the forward rota-
tion and reverse rotation is switched
according to the polarity.
808
Forward rotation
speed limit
50Hz 0–120Hz
Set the speed limit for the forward
rotation direction.
809
Reverse rotation speed
limit
9999
0–120Hz
Set the speed limit of the reverse
rotation side.
9999 As set in Pr. 808.
I001531E
Fig. 6-30: Control block diagram
Sensorless Sensorless Sensorless Vector Vector Vector
Same method as speed
command input
Parameter
(Pr. 808, Pr. 809)
Forward/reverse rotation
speed limit
Pr. 807
Speed limit
selection
Torque command
Speed estimated value < speed limit value
Speed estimated value
≥
speed limit value
Encoder feedback in vector control
Torque
control
Drehzahlregelung
(P-Anteil)
Speed estimator in
real sensorless
vector control
M
3~
Encoder
Real sensorless vector control