1
GATE EE 2006
MCQ (Single Correct Answer)
+2
-0.6
A solar cell of $$350V$$ is feeding power to an $$ac$$ supply of $$440$$ $$V,$$ $$50$$ $$Hz$$ through a $$3$$- phase fully controlled briodge converter. A large inductance is connected in the $$dc$$ circuit to maintain the $$dc$$ current at $$20A.$$ If the solar cell resistance of $$0.5\Omega ,$$ then each thryristor will be reverse biased for a period of
A
$${125^ \circ }$$
B
$${120^ \circ }$$
C
$${60^ \circ }$$
D
$${55^ \circ }$$
2
GATE EE 2006
MCQ (Single Correct Answer)
+2
-0.6
A $$3$$ $$-$$ phase fully controlled bridge converter with free wheeling diode is fed from $$400$$ $$V$$, $$50$$ $$Hz$$ $$AC$$ source and is operating at a firing angle of $${60^ \circ }.$$ The load current is assumed constant at $$10A$$ due to high load inductance The input displacement factor $$(IDF)$$ and the input power factor $$(IPF)$$ of the converter will be
A
$$IDF=0.867:IPF=0.828$$
B
$$IDF=0.867:IPF=0.552$$
C
$$IDF=0.5:IPF=0.478$$
D
$$IDF=0.5:IPF=0.318$$
3
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
Consider a phase $$-$$ controlled converter shown in figure The thyristor is fired at an angle $$\alpha $$ in every positive half cycle of the input voltage. If the peak value of the instantaneous output voltage equals $$230$$ $$V,$$ the firing angle $$\alpha $$ is close to GATE EE 2005 Power Electronics - Single and Three Phase Rectifier Question 37 English
A
$${45^ \circ }$$
B
$${135^ \circ }$$
C
$${90^ \circ }$$
D
$${83.6^ \circ }$$
4
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A phase - controlled half - controlled single - phase converter is shown in figure. The control angle $$\alpha = {30^ \circ }$$ GATE EE 2003 Power Electronics - Single and Three Phase Rectifier Question 38 English

The output $$dc$$ voltage wave shape will be as shown in

A
GATE EE 2003 Power Electronics - Single and Three Phase Rectifier Question 38 English Option 1
B
GATE EE 2003 Power Electronics - Single and Three Phase Rectifier Question 38 English Option 2
C
GATE EE 2003 Power Electronics - Single and Three Phase Rectifier Question 38 English Option 3
D
GATE EE 2003 Power Electronics - Single and Three Phase Rectifier Question 38 English Option 4
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