Question

Calculate the value of output r.m.s voltage for Single phase Half-bridge inverter if the DC supply is 80 V.

(a) 40 V

(b) 20 V

(c) 10 V

(d) 60 V

I had been asked this question during a job interview.

My doubt stems from Solid-State Devices topic in division Introduction to Solid-State Devices of Electric Drives

Answer 1

Right choice is (a) 40 V

For explanation I would say: The output voltage of a single phase half bridge inverter is a square wave with amplitude is equal to vD.C÷2. The r.m.s value of output voltage is vD.C÷2=80÷2=40 V.