119
Torque control by real sensorless vector
control, vector control
4
PARAMETERS
4.5.5 Speed limit (Pr. 807 to Pr. 809)
(1) Control block diagram
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.
Parameter
Number
Name Initial Value
Setting
Range
Description
807 Speed limit selection
0
0
Use the speed command value during speed
control as speed limit.
1
According to Pr. 808 and Pr. 809 , set the speed limit
in forward and reverse rotation directions
individually.
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 rotation and reverse
rotation is switched according to the polarity.
808
Forward rotation speed
limit
50Hz 0 to120Hz Set the speed limit for the forward rotation
direction
.
809
Reverse rotation speed
limit
9999
0 to120Hz Set the speed limit of the reverse rotation
side
.
9999 As set in Pr. 808 .
Sensorless
Sensorless
Vector
Vector
+
-
-
0
1
2
Parameter(Pr. 808, Pr. 809)
Forward/reverse rotation speed limit
Torque command
Same method
as speed command input
Torque control
+
Motor
Pr. 807 Speed limit selection
Speed estimated value < speed limit value
Speed estimated value speed limit value
Speed estimator
Speed control
(proportional control)
Encoder
Real sensorless vector control
Vector control
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