Mitsubishi Electric FR-A700 Technical Manual page 399

2.20.11 Speed smoothing control [Pr.653]
Vibration due to mechanical resonance influences the inverter control, causing the output current (torque) unstable. In this
case, the output current (torque) fluctuation can be reduced to ease vibration by changing the output frequency.
[Pr.] Name
653 Speed smoothing control
(1) Control block diagram
Acceleration/deceleration
processing
Speed
command
(2) Setting method
If vibration due to mechanical resonance occurs, set 100% in [Pr. 653], run the inverter at the frequency which generates
maximum vibration and check if the vibration will be reduced or not after several seconds.
If effect is not produced, gradually increase the [Pr. 653] setting and check the effect repeatedly until the most effective value
is set in [Pr. 653].
If vibration becomes large by increasing the [Pr. 653] setting, gradually decrease the [Pr. 653] setting than 100% to check the
effect in a similar manner. (Depending on the machine, vibration may not be reduced enough or an effect may not be
produced.)
E700 D700
(E700)(D700)
Initial Setting
Value Range
0 0 to 200%
Output frequency
+
-
Speed smoothing control
[Pr.653]
433
Description
Increase or decrease the value using 100% as reference to
check an effect.
V/F control
Torque current
PARAMETER
Frequency output
Voltage output
2