
11
12
13
14
15
16
17
18
19
20
453
16. (G) Control Parameters
16.13 Speed smoothing control
16.13
Speed smoothing control
The output current (torque) of the inverter sometimes becomes unstable due to vibration caused by mechanical resonance.
Such vibration can be suppressed by reducing fluctuation of the output current (torque) by changing the output frequency.
Control block diagram
Setting method
• When vibration caused by mechanical resonance occurs, set 100% in
Pr.653 Speed smoothing control
, perform
operation at the frequency with the largest vibration, and check if the vibration is suppressed after few seconds.
• If the setting is not effective, gradually increase the value set in
Pr.653
and repeat the operation to check the effect to
determine the most effective value (
Pr.653
).
• If the vibration increases by increasing the value in
Pr.653
, decrease the value in
Pr.653
from 100% to check the effect.
• When the vibrational frequency at which mechanical resonance occurs (during fluctuation of torque, speed, or converter
output voltage) is measured using an instrument such as a tester, set 1/2 to 1 times of the vibrational frequency in
Pr.654
Speed smoothing cutoff frequency
. (Setting the resonance frequency range mitigates vibration more effectively.)
NOTE
• Depending on the equipment, the vibration may not be suppressed sufficiently or the setting is not effective.
Pr.
Name
Initial value
Setting
range
Description
653
G410
Speed smoothing
control
0%
0% to 200%
Check the effect by increasing and decreasing the value at around
100%.
654
G411
Speed smoothing
cutoff frequency
20 Hz
0 to 120 Hz
Set the minimum frequency for the torque variation cycle.
V/F
V/F
V/F
Magnetic flux
Magnetic flux
Magnetic flux
V/F control
Current for torque
Frequency output
Voltage output
+
-
Acceleration/deceleration
processing
Output frequency
Speed
command
Proportional gain
Pr.653
Cutoff frequency
Pr.654
Speed smoothing control
0
Vibrational frequency
159Hz (fixed)
Torque fluctuation
detection range
Cutoff frequency
Pr.654
Current for
torque
Содержание FR-E800
Страница 17: ...16 1 Introduction 1 3 Related manuals MEMO ...
Страница 51: ...50 2 Basic Operation 2 8 I O terminal function assignment MEMO ...
Страница 89: ...88 3 Parameters 3 4 Parameter list by function group number MEMO ...
Страница 135: ...134 5 Speed Control 5 9 Troubleshooting in the speed control MEMO ...
Страница 153: ...152 6 Torque Control 6 7 Troubleshooting in torque control MEMO ...
Страница 195: ...194 8 E Environment Setting Parameters 8 18 Current average value monitor signal MEMO ...
Страница 237: ...236 10 D Operation Command and Frequency Command 10 6 Operation by multi speed setting MEMO ...
Страница 339: ...338 13 T Multi Function Input Terminal Parameters 13 9 Start signal operation selection MEMO ...
Страница 455: ...454 16 G Control Parameters 16 13 Speed smoothing control MEMO ...
Страница 481: ...480 18 Appendix 18 4 Parameters functions and instruction codes under different control methods MEMO ...