1
GATE EE 2008
MCQ (Single Correct Answer)
+1
-0.3
A $$3$$ - phase voltage source Inverter is operated in $${180^ \circ }$$ conduction mode. Which one of the following statements is true?
A
Both pole - voltage and line - voltage will have $${3^{rd}}$$ harmonic components
B
Pole - voltage will have $${3^{rd}}$$ harmonic component but line - voltage will be free from $${3^{rd}}$$ harmonic
C
Line - voltage will have $${3^{rd}}$$ harmonic component but pole - voltage will be free from $${3^{rd}}$$ harmonic
D
Both pole - voltage and line - voltage will be free from $${3^{rd}}$$ harmonic components
2
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
A single phase voltage source inverter is feeding a purely inductive load as shown in the figure. GATE EE 2008 Power Electronics - Inverters Question 15 English

The inverter is operated at $$50$$ $$Hz$$ in $${180^0}$$ square wave mode. Assume that the load current does not have any $$dc$$ component. The peak value of the inductor current $${i_0}$$ will be

A
$$6.37$$ $$A$$
B
$$10$$ $$A$$
C
$$20$$ $$A$$
D
$$40$$ $$A$$
3
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
A single - phase half controlled converter shown in the figure feeding power to highly inductive load. The converter is operating at a firing angle of $${60^ \circ }.$$ GATE EE 2008 Power Electronics - Single and Three Phase Rectifier Question 11 English

If the firing pulses are suddenly removed, the steady state voltage $$\left( {{V_0}} \right)$$ waveform of the converter will become

A
GATE EE 2008 Power Electronics - Single and Three Phase Rectifier Question 11 English Option 1
B
GATE EE 2008 Power Electronics - Single and Three Phase Rectifier Question 11 English Option 2
C
GATE EE 2008 Power Electronics - Single and Three Phase Rectifier Question 11 English Option 3
D
GATE EE 2008 Power Electronics - Single and Three Phase Rectifier Question 11 English Option 4
4
GATE EE 2008
MCQ (Single Correct Answer)
+2
-0.6
A single phase fully controlled converter bridge is used for electrical braking of a separately excited $$dc$$ motor. The $$dc$$ motor load is represented by an equivalent circuit as shown in the figure. GATE EE 2008 Power Electronics - Single and Three Phase Rectifier Question 10 English

Assume that the load inductance is sufficient to ensure continuous and ripple free load current. The firing angle of the bridge for a load current of $${{\rm I}_0} = 10\,\,A$$ will be

A
$${44^ \circ }$$
B
$${51^ \circ }$$
C
$${129^ \circ }$$
D
$${136^ \circ }$$
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