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Speed control by Real sensorless
vector control, vector control
4.4.8 Notch filter (Pr. 862, Pr. 863)
(1) Pr. 862 Notch filter time constant
⋅ If you do not know the mechanical resonance frequency, decrease notch frequency gradually from the highest value.
The point at which the smallest vibration is generated is the notch frequency setting.
⋅ Machine characteristic can be obtained beforehand with machine analyzer by FR Configurator. Necessary notch
frequency can be determined from this.
(2) Pr. 863 Notch filter depth
⋅ The notch filter with deeper depth has an effect on minimizing mechanical resonance. However, large vibration may
be generated adversely due to substantial phase delay. Make adjustment of notch depth in order of the shallower
depth.
You can reduce the response level of speed control in the resonance frequency band of the mechanical system
to avoid mechanical resonance.
Parameter
Number
Name Initial Value Setting Range Description
862 Notch filter time constant
0 0 to 60 Refer to the following table
863 Notch filter depth
0 0 to 3 0 (deep) → 3 (shallow)
Setting 0 1 2 3 4 5 6 7 8 9
Frequency Invalid 1000 500 333.3 250 200 166.7 142.9 125 111.1
Setting 10 11 12 13 14 15 16 17 18 19
Frequency 100 90.9 83.3 76.9 71.4 66.7 62.5 58.8 55.6 52.6
Setting 20 21 22 23 24 25 26 27 28 29
Frequency
50 47.6 45.5 43.5 41.7 40 38.5 37 35.7 34.5
Setting 30 31 32 33 34 35 36 37 38 39
Frequency
33.3 32.3 31.3 30.3 29.4 28.6 27.8 27.0 26.3 25.6
Setting 40 41 42 43 44 45 46 47 48 49
Frequency
25.0 24.4 23.8 23.3 22.7 22.2 21.7 21.3 20.8 20.4
Setting 50 51 52 53 54 55 56 57 58 59
Frequency
20.0 19.6 19.2 18.9 18.5 18.2 17.9 17.5 17.2 16.9
Setting 60
Frequency
16.7
Setting 3 2 1 0
Depth
Shallow →←Deep
Gain
-4dB -8dB -14dB -40dB
Sensorless
Sensorless
Sensorless
Vector
Vector
Vector