A single phase fully controlled rectifier is supplying a load with an anti-parallel diode as
shown in the figure. All switches and diodes are ideal. Which one of the following is true
for instantaneous load voltage and current?
A
$${v_0} \ge 0\,\,\& \,\,{i_0} < 0$$
B
$${v_0} < 0\,\,\& \,\,{i_0} < 0$$
C
$${v_0} \ge 0\,\,\& \,\,{i_0} \ge 0$$
D
$${v_0} < 0\,\,\& \,\,{i_0} \ge 0$$
2
GATE EE 2018
Numerical
+2
-0
The figure shows two buck converters connected in parallel. The common input dc voltage
for the converters has a value of 100 V. The converters have inductors of identical value.
The load resistance is 1 $$\Omega $$. The capacitor voltage has negligible ripple. Both converters
operate in the continuous conduction mode. The switching frequency is 1 kHz, and the
switch control signals are as shown. The circuit operates in the steady state. Assuming that
the converters share the load equally, the average value of $${i_{S1}}$$, the current of switch S1 (in
Ampere), is _____ (up to 2 decimal places).
Your input ____
3
GATE EE 2018
Numerical
+2
-0
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).
Your input ____
4
GATE EE 2018
MCQ (Single Correct Answer)
+1
-0.3
Four power semiconductor devices are shown in the figure along with their relevant
terminals. The device(s) that can carry dc current continuously in the direction shown when
gated appropriately is (are)
