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
VPP = Vm(1 − cos(π/6 + α)
Where
Vm = Maximum voltage
α = Firing angle = 30°
VPP = Vm (1 − cos(π/6 + 30°)
VPP = Vm (1 − 0.5)
Vpp/Vm = 0.5