# A fully controlled natural commutated 3-phase bridge rectifier is operating with a firing angle α = 30°. The peak to peak voltage ripple expressed as a ratio of the peak output dc voltage at the output of the converter bridge is

A fully controlled natural commutated 3-phase bridge rectifier is operating with a firing angle α = 30°. The peak to peak voltage ripple expressed as a ratio of the peak output dc voltage at the output of the converter bridge is

### Right Answer is:

0.5

#### SOLUTION

The peak to peak voltage of 3-phase bridge rectifier is given as

V_{PP} = V_{m}(1 − cos(π/6 + α)

Where

V_{m} = Maximum voltage

α = Firing angle = 30°

V_{PP} = V_{m} (1 − cos(π/6 + 30°)

V_{PP} = V_{m} (1 − 0.5)

V_{pp}/V_{m} = 0.5