Question

For the step-down chopper shown in the figure below, dc source voltage = 230 V and the voltage drop across the chopper = 2 V. Find the value of rms output voltage for a duty cycle of 0.4.

(a) 91.2 V

(b) 230 V

(c) 144.2 V

(d) 145 V

I had been asked this question in an online interview.

I want to ask this question from Choppers-4 in division Choppers of Power Electronics

Answer 1

The correct option is (c) 144.2 V

The best explanation: The voltage drop across the switch will occurs only when it is on.

Vo (rms) = √0.4 x (230 – 2) = 144.2 V.