Question

In case of multiple pulse width modulation method, if the amplitudes of the reference wave and the carrier wave are made equal then, the pulse width =

(a) ∞

(b) 0

(c) 100 °

(d) none of the mentioned

I have been asked this question by my college director while I was bunking the class.

This question is from PWM Inverters-5 in section Inverters of Power Electronics

Answer 1

Right choice is (b) 0

To explain I would say: In multiple pulse width modulation, the pulse width is given by

[ 1 – (Vr/Vc) ] x (π/N) (in degrees)

If Vr = Vc

Pulse width = 0.