Mitsubishi Electric FR-A800, Instruction Manual

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Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
FR-A800 5 - 121
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 "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.
Pr. Name
Initial
value
Setting
range
Description
1003
G601
Notch filter frequency 0
0 No notch filter
8 to 1250 Hz Set the frequency for the center of gain attenuation.
1004
G602
Notch filter depth 0 0 to 3 0 (Deep)
→
3 (Shallow)
1005
G603
Notch filter width 0 0 to 3 0 (Narrow)
→
3 (Wide)
I002527E
Fig. 5-36: Notch filter curve
Setting 3 2 1 0
Depth Shallow
→ ←
Deep
Gain –4dB –8dB –14dB –40dB
Tab. 5-44: Notch filter depth
Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Sensorless Vector Vector Vector PM PM PM
Pr.1003
Notch filter frequency
Gain
Pr. 1004
Notch filter depth
Pr. 1005
Notch filter width
Frequency
0dB