Yaskawa Sigma II Series SGMVH - Manual (Page 278)

9 Adjustments
9.4.10 Torque Reference Filter
9-18
(a) Notch Filter
The notch filter can decrease the set frequency responsiveness. The notch filter puts a notch in the gain curve at
the specific vibration frequency. The frequency components near the notch frequency can be eliminated with this
characteristic. A higher notch filter Q value produces a sharper notch and phase delay.
(b) Related Parameters
Q value = 0.7 Q value = 1.0
Notch filter
Notch filter
Gain
(db)
Frequency (Hz)
-300
-200
-100
0
100
2
10 10
3 10 4
2
10 10
3 10 4
Phase
Frequency (Hz)
-400
-300
-200
-100
0
(deg)
-300
-200
-100
0
100
2
10 10
3
10
4
2
10 10
3
10
4
-400
-300
-200
-100
0
Notch filter
Gain
(db)
Frequency (Hz)
Notch filter
Phase
(deg)
Frequency (Hz)
Parameter Meaning
Pn408 n.†††0 First notch filter disabled (Factory setting)
n.†††1 Use first notch filter.
n.†0†† Second notch filter disabled (Factory setting)
n.†1†† Use second notch filter.
Pn409 First Stage Notch Filter Frequency
Setting Range Setting Unit Factory Setting Setting Validation
50 to 2000 1 Hz 2000 Immediately
Pn40A First Stage Notch Filter Q Value
Setting Range Setting Unit Factory Setting Setting Validation
50 to 400 × 0.01 70 Immediately
Pn40B Second Stage Notch Filter Frequency
Setting Range Setting Unit Factory Setting Setting Validation
50 to 2000 1 Hz 2000 Immediately
Pn40C Second Stage Notch Filter Q Value
Setting Range Setting Unit Factory Setting Setting Validation
50 to 400 × 0.01 70 Immediately
Speed Position Torque
Speed Position Torque
Speed Position Torque
Speed Position Torque