Q4) An LC filter is used to reduce the ripple content of the output voltage for a three-phase

rectifier. The load resistance is R = 20 2, load inductance is L = 7.5 mH, and source

frequency is 60 Hz.

1) Draw the equivalent circuit

2) Find the filter capacitor Ce

3) By considering only the first harmonic, i.e., n = 6 determine

a. The expression of the Fourier series for the output voltage.

b. The expression of the rms value of the output voltage harmonic.

c. The expression of the rms value of the ripple voltage Voc.

4) Find the expression of the ripple factor RF for the output voltage

5) Determine the filter parameters Le so that the ripple factor of the output voltage is 3%.