- Question Five A What Are The Factors That Influence The Turn Off Time Of A Thyristor B The Scr Turn Off Poses More 1 (45.31 KiB) Viewed 81 times
Question Five (a) What are the factors that influence the turn-off time of a thyristor? (b) The SCR turn-off poses more problems than SCR turn-on. It is because once the device is ON, the gate loses all control. Briefly explain any two (02) SCR turn-off methods that you know. (c) A DC - DC step-down chopper operates at a frequency of 2 kHz from 100V DC supplying 10 ohm resistive load. If the average output voltage is 50V, with the help of a sketch diagram find: (i) Duty cycle, d (ii) Time on, ton (iii) Average value of load current, Io (iv) The output power, Po