Question

A single-phase HW rectifier with a FD is supplied by Vs = 240 V, 50 Hz, AC with a load R = 10 Ω, L = 0.5 mH and a firing angle α = 30°. Find the average value of the load current.

(a) 10 A

(b) 0.063 A

(c) 6.3 A

(d) 0.1 A

The question was asked by my school principal while I was bunking the class.

Question is from Single-Phase HW AC-DC-3 topic in chapter Converters of Power Electronics

Answer 1

Right choice is (a) 10 A

To explain: Vo = (Vm/2π) x (1+cosα)

Vm = √2Vs

Io = Vm/R  (Due to the FD).