In a LC filter, the ripple factor,

1) LC filter Ripple factor:

For FWR with LC filter, Ripple is given by:

\(r = \frac{{\sqrt 3 }}{3}\frac{{\left| {{X_C}} \right|}}{{\left| {{X_L}} \right|\;}}\)

So, the Ripple factor is independent of load resistance R_L and load current I_L.

Important Point:

1) Ripple factor for L filter:

\(r = \frac{{{R_L}}}{{3\sqrt 2 {W_o}L}} \to r \propto {R_L}\)

R_L = load Resistance

2) Ripple factor for C filter:

\( \Rightarrow r = \frac{1}{{2\sqrt 3 {f_o}c{R_L}}} \to HWR\)

f₀ = supply frequency

\( \Rightarrow r = \frac{1}{{4\sqrt {3} {f_o}c{R_L}}} \to FWR\)