Notch Filter - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
5.3.10

Notch filter

The response level of speed control in the resonance frequency band of mechanical systems can be
lowered to avoid mechanical resonance.
Pr.
1003
G601
1004
G602
1005
G603
Fig. 5-36:
Pr. 1003 "Notch filter frequency"
● This sets the frequency for the center when attenuating the gain. If the mechanical resonance
frequency is unknown, lower the notch frequency in order from the highest. The point where the
resonance is smallest is the optimum setting for the notch frequency.
● The mechanical characteristics can be assessed in advance with a machine analyzer that uses FR
Configurator2. This enables the required notch frequency to be determined.
Pr. 1004 "Notch filter depth"
● A deeper notch depth has a greater effect in reducing mechanical resonance, but because the
phase delay is larger, vibration may increase. Adjust by starting from the shallowest value.
Setting
Depth
Gain
Tab. 5-44:
FR-A800
Sensorless Sensorless Sensorless Vector Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Vector Vector
Name
Notch filter frequency
Notch filter depth
Notch filter width
Gain
0dB
Pr. 1004
Notch filter depth
Notch filter curve
3
Shallow
–4dB
Notch filter depth
PM PM PM
Initial Setting
Description
value range
0 No notch filter
0
8 to 1250 Hz Set the frequency for the center of gain attenuation.
0 (Deep) → 3 (Shallow)
0 0 to 3
0 (Narrow) → 3 (Wide)
0 0 to 3
Pr.1003
Notch filter frequency
Pr. 1005
Notch filter width
2
→
–8dB
Frequency
1 0
←
Deep
–14dB –40dB
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