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To avoid commutation failure

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in Power Electronics by (27.1k points)
To avoid commutation failure

(a) circuit turn-off time must be greater than the thyristor turn-off time

(b) circuit turn-off time must be lesser than the thyristor turn-off time

(c) circuit turn-off time must be equal to the thyristor turn-off time

(d) none of the above mentioned

I had been asked this question by my school principal while I was bunking the class.

This interesting question is from Thyristors-3 topic in division Power Electronics Devices of Power Electronics

1 Answer

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by (45.1k points)
The correct answer is (a) circuit turn-off time must be greater than the thyristor turn-off time

For explanation: If the thyristor turn off time is more than the circuit turn off time, the circuit will be turned off and the thyristor will keep conducting, which is not at all desirable.

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