Справочник Пользователя для Mitsubishi Electronics FR-A700
118
Speed control by Real sensorless
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.
depth.
You can reduce the response level of speed control in the resonance frequency band of the mechanical system
to avoid mechanical resonance.
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