Mitsubishi Electric FR-F800 Series Instruction Manual page 194

5.3.4
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.
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.
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Torque detection filter
Initial
Name
value
0 s
9999
search engine
Setting
range
0 Without filter
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 Same as Pr.827 setting
Description
page 377.)
5. PARAMETERS
5.3 Speed control under PM motor control
1
2
3
4
5
6
7
8
9
10
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