Hiwin E1 Series - Page 251

E1 Series Servo Drive User Manual Tuning
HIWIN MIKROSYSTEM CORP. 10-19
MD09UE01-1910
 Notch filter Q value
Notch filter Q value defines the width of filtering frequency. The width of notch varies with the
setting of notch filter Q value. As notch filter Q value increases, the width of filtering frequency
becomes narrower.
Figure10.6.3.2 Notch filter Q value
Q value and the bandwidth of notch filter are relevant. The formula for calculating the
bandwidth is: Bandwidth (BW) = The frequency of notch filter (fc)/Q value
Table10.6.3.4
Q value
Bandwidth (Hz)
0.5
BW=fc/0.5
0.7
BW=fc/0.7
1
BW=fc/1
Example:
The frequency of notch filter is 400. The Q value is 0.5. Then the bandwidth (BW) is
approximately 200 Hz.
Q = 0.5
Q = 0.7Q = 1.0
0
-5
-10
-15
-20
Attenuation [dB]
Frequency [Hz]
Bandwidth [BW]