Question

A single phase full bridge inverter using transistors and diodes is feeding a R load of 3 Ω with the dc input voltage of 60 V. Find the fundamental frequency output power.

(a) 1200 W

(b) 856 W

(c) 972 W

(d) 760 W

I got this question in semester exam.

My question is from Quality of Inverters in section Inverters of Power Electronics

Answer 1

Correct option is (c) 972 W

For explanation I would say: V1 (rms) = 4Vs/π√2 = 54.02 V

P = (V1)^2/R = 972.72 W.