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A three-phase, three-pulse, M-3 type controlled converter has firing angle for one of the SCRs set as 15°. This SCR would start conducting at

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in Power Electronics by (27.1k points)
A three-phase, three-pulse, M-3 type controlled converter has firing angle for one of the SCRs set as 15°. This SCR would start conducting at

(a) 0°

(b) 15°

(c) 30°

(d) 45°

The question was posed to me during an interview.

I need to ask this question from Three Phase Converters-1 topic in portion Converters of Power Electronics

1 Answer

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by (45.1k points)
The correct choice is (d) 45°

The explanation is: In a three phase controller, the actually conduction starts at 30° + α. Hence, ωt = 30+15 = 45°.

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