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A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60° and output AC power of 2127 Watts, find the rectification efficiency

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A single-pulse transformer with secondary voltage of 230 V, 50 Hz, delivers power to bulb of R = 10 Ω through a half-wave controlled rectifier circuit. For α = 60° and output AC power of 2127 Watts, find the rectification efficiency

(a) 98.6 %

(b) 42 %

(c) 28 %

(d) 19 %

The question was asked in quiz.

My doubt stems from Single-Phase HW AC-DC-4 in division Converters of Power Electronics

1 Answer

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by (45.1k points)
Correct answer is (c) 28 %

Best explanation: Vo = (Vm/2π) x (1+cosα) = 77.64 V

Pdc = Vo^2xR = 602.8 W

Rectification efficiency = Pdc/Pac = 28.32 %.

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