Question

A single phase half bridge inverter has a dc voltage source Vs/2 = 115 V. Find the rms value of the fundamental component of output voltage.

(a) 510 V

(b) 103.5 V

(c) 120 V

(d) 96 V

This question was addressed to me in final exam.

This interesting question is from Single Phase VSI-3 in section Inverters of Power Electronics

Answer 1

Right choice is (b) 103.5 V

For explanation I would say: The fundamental component of voltage = (2Vs/π) sinωt.

Peak value Vm = 2Vs/π

Rms value = 2Vs/π√2 = 103.552 V.