Mitsubishi Electric FR-F800, Instruction Manual

Page: 218 / 834

Speed control under PM motor control Parameters
5 - 56
5.3.4 Torque detection filter
Set the time constant of primary delay filter for torque feedback signal.
Speed loop response is reduced. Under ordinary circumstances, therefore, use the initial value as it is.
Stabilizing torque detection (Pr. 827, Pr. 837)
Current loop response is reduced. Under ordinary circumstances, therefore, use the initial value as it is.
If there is torque ripple due to high frequency disturbance, adjust until speed stabilizes by gradually
raising the setting. Speed is oppositely destabilized if the setting value is too large.
Employing multiple primary delay filters
Use Pr. 837 if changing filter according to application. Pr. 837: Second function selection (RT) signal
Pr. Name
Initial
value
Setting
range
Description
827
G216
Torque detection filter 1 0 s
0 Without filter
0.001 to 0.1 s
Set the time constant of primary delay filter torque
feedback signal.
837
G316
Torque detection filter 2 9999
0 to 0.1 s
Second function of Pr. 827 (enabled when RT signal
ON)
9999 Same as Pr. 827 setting
NOTES The RT signal is a second function selection signal. The RT signal also enables other second func-
tions. (Refer to page 5-285.)
The RT signal is assigned to the terminal RT in the initial setting. Set "3" in any of Pr. 178 to Pr. 189
(input terminal function selection) to assign the RT signal to another terminal.
PM PM PM