1
GATE EE 2003
+2
-0.6
An inverter has a periodic output voltage with the output waveform as shown in figure

When the conduction angle $$\alpha = {120^0},$$ the $$rms$$ fundamental component of the output voltage is

A
$$0.78$$ $$V$$
B
$$1.10$$ $$V$$
C
$$0.90$$ $$V$$
D
$$1.27$$ $$V$$
2
GATE EE 2003
+2
-0.6
An inverter has a periodic output voltage with the output waveform as shown in figure

With reference to the output waveform given in figure, the output of the converter will be free form $${5^{th}}$$ harmonic when

A
$$\alpha = {72^ \circ }$$
B
$$\alpha = {36^ \circ }$$
C
$$\alpha = {150^ \circ }$$
D
$$\alpha = {120^ \circ }$$
3
GATE EE 2002
+2
-0.6
Fig. $$(a)$$ shows an inverter circuit with a $$dc$$ source voltage $${V_{s}}$$. The semiconductor switches of the inverter are operated in such a manner that the pole voltages $${V_{10}}$$ and $${V_{20}}$$ are as shown in fig.
Fig. $$(b).$$ What is the rms value of the pole-to-pole voltage $${V_{12}}$$:
A
$${{{V_s}\phi } \over {\pi \sqrt 2 }}$$
B
$${V_s}\sqrt {{\phi \over \pi }}$$
C
$${V_s}\sqrt {{\phi \over {2\pi }}}$$
D
$${{{V_s}} \over \pi }$$
4
GATE EE 2001
+2
-0.6
A single - phase full-bridge voltage source inverter feeds a purely inductive load, as shown in figure. when $${T_1},{T_2},\,\,\,\,\,{T_3},{T_4}$$ are power transistors and $${D_1},{D_2},\,{D_3},{D_4}$$ are feedback diodes. The inverter is operated in square-wave mode with a frequency of $$50$$ $$Hz.$$ If the average load current is zero, what is the time duration of conduction of each feedback diode in a cycle?
A
$$5\,\,m\,\,\sec$$
B
$$10\,\,m\,\,\sec$$
C
$$20\,\,m\,\,\sec$$
D
$$2.5\,\,m\,\,\sec$$
EXAM MAP
Medical
NEET