The filter capacitor can be calculated as function of the filter inductance, the AC frequency and the filter coefficient. The next formula is used to make these calculations:
Formula 1
Filter capacitance:
Where:
C is the filter capacitance in farads (F)
α is the filter coefficient
ω = 2 x π x f where f is the AC frequency in hertz (Hz)
L is the coil inductance in henry (H)
Derivated formula
Formula 2
Filter capacitance II:
Where all the quantities are as in the previous formula except η:
η is the filter efficience
