Question

Calculate the value of the fundamental displacement factor for 1-Φ Full wave bridge rectifier if the firing angle value is 60°.

(a) .5

(b) .4

(c) .2

(d) .8

I had been asked this question in final exam.

My query is from Solid State Controlled Drives topic in chapter Introduction to Solid State Controlled Drives of Electric Drives

Answer 1

Right option is (a) .5

The explanation is: Fundamental displacement factor is the cosine of angle difference between the fundamental voltage and fundamental current. D.F=cos(∝)=cos(60°)=0.5.