Question

Calculate the output voltage of the Buck converter if the supply voltage is 789 V and duty cycle value is .9.

(a) 711.1 V

(b) 710.1 V

(c) 722.2 V

(d) 713.2 V

I have been asked this question in an online interview.

My question is from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives

Answer 1

Correct option is (b) 710.1 V

Explanation: The output voltage of the buck converter is Vo = Vin×(D)=789×.9=710.1 V. The value of the duty cycle is less than one which makes the Vo < Vin. The buck converter is used to step down the voltage.