Question

Calculate the line voltage for 3-∅ 120° VSI if the value of DC supply is 24 V.

(a) 16.52 V

(b) 16.97 V

(c) 12.96 V

(d) 12.48 V

I got this question in my homework.

My doubt stems from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Right option is (b) 16.97 V

To elaborate: The line voltage for 3-∅ 120° VSI is (VDC÷√2)=.707×24=16.97 V. In 3-phase 120° VSI each phase conducts for 120° and only three switches from different phases conduct at a single time.