Question

In the single-pulse width modulation method, when the pulse width of 2d is equal to its maximum value of π radians, then the fundamental component of output voltage is given by

(a) Vs

(b) 4Vs/π

(c) 0

(d) 2Vs/π

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

Query is from PWM Inverters-1 topic in section Inverters of Power Electronics

Answer 1

Right choice is (b) 4Vs/π

Easy explanation: The Fourier representation of the output voltage is given by

Put 2d = π & n = 1.