110
Speed control by real sensorless vector
control, vector control
(4) Setting torque bias amount with terminal 1 (Pr. 840 = "3")
⋅ C16 Terminal 1 bias command (torque/magnetic flux), C17 Terminal 1 bias (torque/magnetic flux), C18 Terminal 1 gain
command (torque/magnetic flux), C19 Terminal 1 gain (torque/magnetic flux), and Pr. 846 Torque bias balance compensation
can be set automatically according to the load.
⋅ When torque command is set from terminal 1, set "6" in Pr. 868 Terminal 1 function assignment.
⋅ Setting C16, C17 (Pr. 919) , C18, C19 (Pr. 920)
⋅ Setting Pr. 846
(5) Torque bias operation
⋅ When a value other than 9999 is set in Pr. 844 Torque bias filter, you can slow the rise of torque. At this time, the
torque rises according to the time constant of the primary delay filter.
⋅
Set the time for output torque be maintained with the torque bias command value alone in
Pr. 845 Torque bias operation time
.
* When pre-excitation is not made, the torque bias functions simultaneously with the start signal.
Operation without a
load
Read C16, C17
(Pr. 919) when
speed is stable
Press .
(setting C16, C17
(Pr. 919) is completed)
Press .
(setting C18, C19
(Pr. 920) is completed)
Read C18, C19
(Pr. 920) when
speed is stable
Operation with a
maximum load
Operation with a
balanced load
Read Pr. 846
Press .
Torque balance
compensation under
power driving is
completed.
CAUTION
When starting torque bias operation after completion of automatic setting, set "1 or 2" in Pr. 840.
CAUTION
⋅
When torque bias is made valid and "6" is set in
Pr. 868
, terminal 1 serves as torque command not as frequency setting auxiliary.
When override compensation is set by
Pr. 73
and terminal 1 acts as main speed, no main speed (main speed = 0Hz) is slected.
⋅
Changing the terminal assignment using
Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Make
setting after confirming the function of each terminal.
Reference parameters
⋅ Pr. 73 Analog input selection Refer to page 275.
⋅ Pr. 178 to Pr. 189 (input terminal function selection) Refer to page 222.
⋅ C16 to C19 (torque setting voltage (current) bias and gain) Refer to page 288.
Speed
Torque bias
Torque bias filter
primary delay time
constant
Time when torque is
generated by
torque bias setting
Pre-excitation LX
*
Start signal
Pr. 844
Pr. 845
Output torque
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