Question

Calculate the value of the fundamental displacement factor for 1-Φ Full wave bridge rectifier if the firing angle value is 38°.

(a) .22

(b) .78

(c) .33

(d) .44

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This question is from Solid-State Switching Circuits in division Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Right option is (b) .78

The explanation is: Fundamental displacement factor is the cosine of angle difference between the fundamental voltage and fundamental current. D.F=cos(∝)=cos(38°)=0.78.