Question

For a certain SCR configuration, the below shown waveform is obtained. Find the value of the average output voltage with α = 30° & Vs = 240 V.

(a) 50.27 V

(b) 100.8 V

(c) 140 V

(d) 120 V

I got this question in an online quiz.

My doubt stems from Single-Phase HW AC-DC-2 topic in division Converters of Power Electronics

Answer 1

Right option is (b) 100.8 V

To explain: Vm = √2 Vs = 339.41 V

Vavg = ∫ Vm Sin ωt  d(ωt) where the integration runs from α to π

Vavg = Vm/2π (1+cos α).