Question

A step-down chopper has input voltage 12 V and output voltage 2 V. Calculate the value of the duty cycle.

(a) 0.26

(b) 0.16

(c) 0.33

(d) 0.41

I have been asked this question in unit test.

My question comes from Solid-State Devices in section Introduction to Solid-State Devices of Electric Drives

Answer 1

Right answer is (b) 0.16

Easiest explanation: The output voltage of the step-down chopper is Vo = Vin×(D). The value of the duty cycle is less than one which makes the Vo < Vin. The step-down chopper is used to step down the voltage. The value of the duty cycle is 2÷12=.16.