1
GATE EE 2018
Numerical
+2
-0.67
A dc to dc converter shown in the figure is charging a battery bank, B2 whose voltage is constant at 150 V. B1 is another battery bank whose voltage is constant at 50 V. The value of the inductor, L is 5 mH and the ideal switch, S is operated with a switching frequency of 5 kHz with a duty ratio of 0.4. Once the circuit has attained steady state and assuming the diode D to be ideal, the power transferred from B1 to B2 (in Watt) is ___________ (up to 2 decimal places).
2
GATE EE 2017 Set 1
MCQ (Single Correct Answer)
+2
-0.6
The input voltage $${V_{DC}}$$ of the buck-boost converter shown below varies from $$32$$ $$V$$ to $$72$$ $$V.$$ Assume that all components are ideal, inductor current is continuous, and output voltage is ripple free. The range of duty ratio $$D$$ of the converter for which the magnitude of the steady state output voltage remains constant at $$48$$ $$V$$ is
A
$${2 \over 5} \le D \le {3 \over 5}$$
B
$${2 \over 5} \le D \le {3 \over 4}$$
C
$$0 \le D \le 1$$
D
$${1 \over 3} \le D \le {2 \over 3}$$
3
GATE EE 2017 Set 2
Numerical
+2
-0
In the circuit shown all elements are ideal and the switch $$S$$ is operated at $$10$$ $$kHz$$ and $$60$$% duty ratio. The capacitor is large enough so that the ripple across it is negligible and at steady state acquires a voltage as shown. The peak current in amperes drawn from the $$50$$ $$V$$ $$DC$$ source is ________. (Give the answer up to one decimal place.)
4
GATE EE 2015 Set 1
Numerical
+2
-0
A buck converter feeding a variable resistive load is shown in the figure. The switching frequency of the switch $$S$$ is $$100$$ $$kHz$$ and the duty ratio is $$0.6.$$ The output voltage $${V_0}$$ is $$36$$ $$V.$$ Assume that all the components are ideal, and that the output voltage is ripple-free. The value of $$R$$ (in $$Ohm$$) that will make the inductor current ($${{\rm I}_L}$$) just continuous is _______.