Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
PARAMETERS
205
5
Torque bias operation (Pr.844, Pr.845)
• The torque start-up can be made slower by setting Pr.844 Torque bias filter "9999". The torque start-up operation at this
time is the time constant of the primary delay filter.
• Set the time for continuing the output torque simply by using the command value for the torque bias in Pr.845 Torque bias
operation time.
When pre-excitation is not performed, the torque bias functions at the same time as the start signal.
NOTE
• When torque bias is enabled and Pr.868 ="6", terminal 1 operates as a torque command instead of a frequency setting
auxiliary. When override compensation is selected using Pr.73 Analog input selection and terminal 1 is the main speed, no
main speed (main speed=(0Hz) is set.
• Changing the terminal assignment using Pr.178 to Pr.189 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Pr.73 Analog input selection page 406
Pr.178 to Pr.189 (input terminal function selection) page 430
C16 to C19 (Pr.919, Pr.920) (torque setting voltage (current) bias/gain) page 421
Speed
Torque bias
Torque bias filter
primary delay time
constant
Time when torque is
generated by
torque bias setting
Pre-excitation LX
∗1
Start signal
Pr. 844
Pr. 845
Output torque
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