Q1Power Electronics

Question

A single-phase full wave fully controlled converter with RLE load of $R = 0 ohms, L = 2 mH$ is being fed from a source voltage of $230 V$ and frequency $50 Hz$ . Compute the firing angle delay for $E = 120 V$ and for $E = - 120 V$ . Find the input power factor in both cases.

Answer 1

Question

10 marks

A single-phase full wave fully controlled converter with RLE load of $R = 0 ohms, L = 2 mH$ is being fed from a source voltage of $230 V$ and frequency $50 Hz$ . Compute the firing angle delay for $E = 120 V$ and for $E = - 120 V$ . Find the input power factor in both cases.

Answer

For a fully controlled bridge with R=0, L=2 mH, Vs=230 V, 50 Hz: for E=+120 V, α≈31.1° and for E=-120 V, α≈148.9°; the power factor is computed from real power and apparent power.