GATE EE 2017 Set 1 — Question 38
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Power Electronics → DC-DC Converters → Buck-Boost Converter
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Question
The input voltage of the buck-boost converter shown below varies from to . Assume that all components are ideal, inductor current is continuous, and output voltage is ripple free. The range of duty ratio of the converter for which the magnitude of the steady-state output voltage remains constant at is
Correct answer
(A) (2)/(5) ≤ D ≤ (3)/(5)
Solution
For a buck-boost converter, the relationship between output voltage and input voltage is given by:Given (magnitude).
Case 1:
Case 2:
Thus, the range of duty ratio is .
Case 1:
Case 2:
Thus, the range of duty ratio is .
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