(a) Draw the equivalent circuit for three-phase thyristor controlled full-wave bridge [3] rectifier.
(b) Draw the waveforms of the DC output voltage and the valve side AC current. [6] Assume the thyristor firing angle , the AC line has zero input inductance and the DC current is ripple-free. a = 0
(c) Calculate the RMS value for the AC current in b) assuming that the DC current is [4] Iᵨ
(d) Calculate the average direct voltage when the input inductance L=0H and [7] firing angle angle α=0∘.