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Below shown ideal circuit is triggered at a firing angle of α. From ωt = π to 2π+α

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in Power Electronics by (27.1k points)
Below shown ideal circuit is triggered at a firing angle of α. From ωt = π to 2π+α

(a) SCR voltage is zero

(b) Load voltage is maximum

(c) SCR voltage is –Vmsinα

(d) SCR acts like a short circuit

The question was asked in an online interview.

Origin of the question is Single-Phase HW AC-DC-1 in division Converters of Power Electronics

1 Answer

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by (45.1k points)
Right choice is (c) SCR voltage is –Vmsinα

The explanation is: From ωt = π to 2π+α, negative cycle is active and the SCR experiences revered biased voltage by Vs.

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