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In the below given circuit, when the commutating diode or FD is conducting than the

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in Power Electronics by (27.1k points)
In the below given circuit, when the commutating diode or FD is conducting than the

(a) SCR has reverse bias voltage and the load current is zero

(b) SCR has reverse bias voltage and the load current is positive

(c) SCR has forward bias voltage and the load current is zero

(d) SCR has forward bias voltage and the load current is positive

This question was posed to me in a job interview.

My doubt stems from Single-Phase HW AC-DC-3 topic in chapter Converters of Power Electronics

1 Answer

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by (45.1k points)
The correct choice is (b) SCR has reverse bias voltage and the load current is positive

Explanation: When the FD is forward biased at π by the conducting SCR & the current starts to through the FD & load.

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