Torque Detection Filter - Mitsubishi Electric FR-F820-00046 Instruction Manual

Fr-f800 series
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5.3.4

Torque detection filter

PM
PM
PM
Set the time constant of primary delay filter torque feedback signal.
Speed loop response is reduced. Under ordinary circumstances, therefore, use the initial value as it is.
Pr.
Name
827
Torque detection filter 1
G216
837
Torque detection filter 2
G316
 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.833 and Pr.837 if changing filter according to application. Pr.837 is enabled when the Second function selection
(RT) signal is turned ON.
NOTE
• The RT signal is a second function selection signal which also enables other second functions. (Refer to
• The RT signal is assigned to the terminal RT in the initial status. Set "3" in one of Pr.178 to Pr.189 (Input terminal function
selection) to assign the RT signal to another terminal.
Initial
Setting
value
range
0
Without filter
0 s
0.001 to 0.1 s Set the time constant of primary delay filter torque feedback signal.
0 to 0.1 s
Second function of Pr.827 (enabled when the RT signal is ON)
9999
9999
Same as Pr.827 setting
Description
page
358.)
5. PARAMETERS
5.3 Speed control under PM motor control
1
2
3
4
5
6
7
8
9
10
185

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