Mitsubishi Electric FR-A800, Instruction Manual

Page: 366 / 1042

Real sensorless vector control, vector control, PM sensorless vector control adjustment Parameters
5 - 186
5.6 Real sensorless vector control, vector control,
PM sensorless vector control adjustment
5.6.1 Speed detection filter and torque detection filter
Set the time constant of primary delay filter for speed feedback signal and torque feedback signal.
Speed loop response is reduced. Under ordinary circumstances, therefore, use the initial value as it is.
These parameters are available when a vector control compatible option is installed.
Stabilizing speed detection (Pr. 823, Pr. 833)
●
Speed loop response is reduced. Under ordinary circumstances, therefore, use the initial value as
it is.
If there is speed 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.
●
This setting is valid under vector control only.
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, Pr. 837 if changing filter according to application. Pr. 833, Pr. 837: Second function
selection (RT) signal
Purpose Parameter to set
Refer
to
page
To stabilize speed and torque feedback
signal.
Speed detection filter
Torque detection filter
P.G215, P.G216,
P.G315, P.G316 Pr. 823, Pr. 827, Pr.
833, Pr. 837
5-186
To changes excitation ratio Excitation ratio P.G217 Pr. 854 5-187
Pr. Name
Initial
value
Setting
range
Description
823
G215
Speed detection filter 1 0.001 s
0 Without filter
0.001 to 0.1 s
Set the time constant of primary delay filter for speed
feedback signal.
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.
833
G315
Speed detection filter 2 9999
0 to 0.1 s
Second function of Pr. 823 (enabled when RT signal
ON)
9999 Same as Pr. 823 setting
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 5-428.)
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.
Sensorless Sensorless Sensorless Vector Vector Vector PM PM PM