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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.) GATE EE 2017 Set 2 Power Electronics - Choppers and Commutation Techniques Question 20 English
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2
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
A three-phase voltage source inverter with ideal devices operating in $${180^ \circ }$$ conduction mode is feeding a balanced star-connected resistive load. The $$DC$$ voltage input is $${V_{dc}}.$$ The peak of the fundamental component of the phase voltage is
A
$${{{V_{dc}}} \over \pi }$$
B
$${{2{V_{dc}}} \over \pi }$$
C
$${{3{V_{dc}}} \over \pi }$$
D
$${{4{V_{dc}}} \over \pi }$$
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GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.6
The figure below shows a half-bridge voltage source inverter supplying an $$RL$$-load with $$R = 40\,\,\Omega $$ and $$L = \left( {{{0.3} \over \pi }} \right)H.$$ The desired fundamental frequency of the load voltage is $$50$$ $$Hz.$$ The switch control signals of the converter are generated using sinusoidal pulse width modulation with modulation index. $$M = 0.6.$$ at $$50$$ $$Hz$$, the$$RL$$-load draws an active power of $$1.44$$ $$kW.$$ The value of $$DC$$ source volts is GATE EE 2017 Set 2 Power Electronics - Inverters Question 7 English
A
$$300\,\,\sqrt 2 $$
B
$$500$$
C
$$500\,\,\sqrt 2 $$
D
$$1000\,\,\sqrt 2 $$
4
GATE EE 2017 Set 2
Numerical
+2
-0
Consider an overhead transmission line with $$3$$-phase, $$50$$ $$Hz$$ balanced system with conductors located at the vertices of an equilateral triangle of length $$\,{D_{ab}} = {D_{bc}} = {D_{ca}} = 1\,\,\,$$ m as shown in figure below. The resistance of the conductors are neglected. The geometric mean radius (GMR) of each conductor is $$0.01$$ $$m$$. Neglect the effect of ground, the magnitude of positive sequence reactance in $$\,\Omega $$/$$km$$ (rounded off to three decimal places) is ________________. GATE EE 2017 Set 2 Power System Analysis - Parameters and Performance of Transmission Lines Question 18 English
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