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Q#1 Power Semiconductor Devices GATE EE 2023 NAT +2 marks -0 marks

The circuit shown in the figure has reached steady state with thyristor '' in OFF condition. Assume that the latching and holding currents of the thyristor are zero. The thyristor is turned  at . The duration in microseconds for which the thyristor would conduct, before it turns off, is ___ (Round off to 2 decimal places).

Explanation:

If circuit is in steady state with T : OFF

C : Open L : shoot

vc = 100V iL = 0A

Now when T : ON, a LC oscillator is formed

Diagram, schematic

Description automatically generated

Load current

= 25 + 50 sinω0t

Diagram, schematic

Description automatically generated

T turns OFF when IT = 0

25 + 50 sinω0t = 0

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