A fully controlled natural commutated 3-phase bridge rectifier

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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

1. 0.5
2. √3
  2
3. 1 - √3
  2
4. √3 - 1

Correct Option: A

NA