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A single phase full controlled bridge converter is connected to load having R = 0.4 Ω, E = 120, L = 0.2 mH, Vs = 230V. The RMS value of load current is 10 A for a firing angle of 53.21°. Find the input power factor.

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A single phase full controlled bridge converter is connected to load having  R = 0.4 Ω, E = 120, L = 0.2 mH, Vs = 230V. The RMS value of load current is 10 A for a firing angle of 53.21°. Find the input power factor.

(a) 0.5043 lag

(b) 0.5391 lag

(c) 0.6120 lag

(d) Unity

I got this question in exam.

This key question is from Single Phase FW AC-DC-4 topic in portion Converters of Power Electronics

1 Answer

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by (45.1k points)
Correct choice is (b) 0.5391 lag

For explanation: Io = Irms = 10A

Vs x Irms x cosɸ =  E Io + Irms^2 R.

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