- Question 5 A Describe The Working Of A Single Phase One Pulse Scr Controlled Converter With Rle Load Y Through The W 1 (22.55 KiB) Viewed 53 times
Question #5: (a) Describe the working of a single-phase one-pulse SCR controlled converter with RLE load Y through the waveforms of supply voltage, load voltage, load current and voltage across the SCR. Hence derive expression for the load current in terms of supply voltage, load impedance, firing angle, load voltage E etc. (b) A single-phase one-pulse converter with RLE load has the following data: Supply voltage: 230 V at 50 HZ, R=22, L = 1 mH, E= 120 V. Extinction angle = 2209, firing angle a = 25°. i) Calculate the voltage across thyristors at the instant SCR is triggered. (ii) Find the voltage that appears across SCR when current decays to zero, (ii) Find the peak inverse voltage for the SCR.