Question

Calculate the value of the fundamental displacement factor for 1-Φ Full wave semi-converter if the firing angle value is 95^o.

(a) .60

(b) .68

(c) .62

(d) .67

This question was posed to me by my college director while I was bunking the class.

Asked question is from Solid-State Switching Circuits topic in portion Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Right option is (d) .67

To explain: Fundamental displacement factor is the cosine of angle difference between the fundamental voltage and fundamental current. The fundamental displacement factor for 1-Φ Full wave semi-converter is cos(∝÷2)=cos(47.5^o)=.67.