Question

Find the peak value of the fundamental component of voltage with MPM with two pulses having pulse width = 36° and ɣ = 54°. The Fourier representation of the waveform is as follows.

(a) 0.7484 x Vs

(b) 1.414 x Vs

(c) 0.637 x Vs

(d) 2.54 x Vs

The question was posed to me in an interview for job.

My question is taken from PWM Inverters-2 topic in division Inverters of Power Electronics

Answer 1

Right option is (c) 0.637 x Vs

To elaborate: For the fundamental component put n = 1.

n = 36° and ɣ = 54° . . . (given)

Vo1 = 8Vs/π x sin54 x sin18 = 0.637 Vs.