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In current commutated copper circuit

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in Power Electronics by (27.1k points)
In current commutated copper circuit

(a) the capacitor cannot charge on no load

(b) the auxiliary thyristor is turned on automatically

(c) the auxiliary thyristor is naturally commutated

(d) the commutation is not reliable

I have been asked this question during an interview for a job.

My question comes from Thyristor Chopper Circuits-2 in division Choppers of Power Electronics

1 Answer

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by (45.1k points)
Correct answer is (c) the auxiliary thyristor is naturally commutated

For explanation I would say: It is naturally commutated as its commutating current passes through zero value in the ringing circuit formed by L and C.

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