Question

What would be the harmonic factor of lowest order harmonic in case of a half wave bridge inverter?

(a) 1/1

(b) 1/3

(c) 1/2

(d) Insufficient data

I have been asked this question in examination.

This is a very interesting question from Quality of Inverters topic in division Inverters of Power Electronics

Answer 1

Right option is (b) 1/3

For explanation I would say: Let Vs be the input voltage.

The 3rd harmonic is the lowest order harmonic.

Vo (rms) = 2Vs/(n x π x √2)

For fundamental component n = 1 and for the lowest order harmonic n = 3

ρ3 = V3/V1 = 1/3 or 33.33 %.