Vertical Ferrous-Silicon Aluminum Motor Inductor

Vertical Ferrous-Silicon Aluminum Motor Inductor

The second order filter uses two resistible elements, and this arrangement has two advantages over the first order filter: a) Ideally, the second order filter provides attenuation of 12dB per octave above the cutoff frequency (four times that of the first order filter); b) It can have greater attenuation above the resonant frequency point of the inductor.

In order to obtain the appropriate cutoff frequency (Wc) response, the design requirements of the second-order filter are more stringent than that of the first-order filter. However, its attention to higher frequencies has decreased. One of the key factors in the design of higher order filters is the attenuation characteristic of the corner frequency. In the design of the second order filter, the damping factor ζ is usually represented by the Greek letter), which describes both the gain at the corner frequency and the time-domain response of the filter, and is an important characteristic to express the characteristics of the above key factors.