Question

Calculate the output voltage of the Boost converter if the supply voltage is 8 V and duty cycle value is .6.

(a) 40 V

(b) 20 V

(c) 48 V

(d) 51 V

I have been asked this question in an online interview.

My question is from Solid State Controlled Drives topic in chapter Introduction to Solid State Controlled Drives of Electric Drives

Answer 1

Correct answer is (b) 20 V

To explain: The output voltage of the boost converter is Vo = Vin ÷ (1-D) = 8÷.4 = 20 V. The value of the duty cycle is less than one which makes the Vo > Vin as denominator value decreases and becomes less than one. The boost converter is used to step up the voltage.