Specifications

Control Block Description ADDvantage-32 PLUS
4-67
4.46 NOTCH FILTER
The Notch Filter block is a band reject filter designed to damp out machine resonance. In
many cases this resonance is speed independent and occurs at approximately 5-7 Hz.
MAGNITUDE
WD
OUT
fc =
1.0
NOTCHFLLAN
FIGURE 4-46. NOTCH FILTER BLOCK
1. Inputs
INP: Analog
WD: Analog
DEPTH: Analog
FREQ: Analog
2. Outputs
OUT: Analog
3. Implementation
The DEPTH parameter sets the depth of the notch. It can range from 0 to 100. Entering
a number less than 2 will yield a notch depth of 0. A depth of 3 will reduce the gain by
1/3 (33%) at frequency point.
The FREQ parameter is used to set the center frequency of the notch. The usable range is
from 2 to 15 Hz.