Question

For the step-down chopper shown in the figure below, dc source voltage = 230 V. Find the power input to the chopper If load of R = 10 Ω is connected. Duty cycle = 40 %.

(a) 2300 W

(b) 2097 W

(c) 2560 W

(d) 5290 W

This question was posed to me during an interview.

I'm obligated to ask this question of Choppers-4 topic in chapter Choppers of Power Electronics

Answer 1

The correct choice is (b) 2097 W

The best I can explain: Power input to the chopper is Vs . Io

Vs = 230 V

Vo = (Vs – 2) x Duty cycle = 91.2 V

Io  = Vo/R = 91.2/10

Pi = Vs.Io = 2097.6 W.