1
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
The power electronic converter shown in the figure has a single-pole double-throw switch. The pole $$P$$ of the switch is connected alternately to throws $$A$$ and $$B.$$ The converter shown is a GATE EE 2010 Power Electronics - Choppers and Commutation Techniques Question 35 English
A
step-down chopper (buck converter)
B
half-wave rectifier
C
step-up chopper (boost converter)
D
full-wave rectifier
2
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
A step down chopper is operated in the continuous conduction mode in steady state with a constant duty ratio $$D.$$ If $${V_0}$$ is the magnitude of the $$dc$$ output voltage and if $${V_s}$$ is the magnitude of the $$dc$$ input voltage, the ratio $${{{V_0}} \over {{V_s}}}$$ is given by
A
$$D$$
B
$$1-D$$
C
$${1 \over {1 - D}}$$
D
$${D \over {1 - D}}$$
3
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
In a thyristor $$dc$$ chopper which type of commutation results in best performance?
A
Voltage commutation
B
Current commutation
C
Load commutation
D
Supply commutation
4
GATE EE 1995
Numerical
+1
-0
Consider the chopper circuit of figure. The chopper operates at $$400$$ $$Hz$$ and $$50$$% duty cycle. The load current remains almost ripple free at $$10A.$$ Assuming the input voltage to be $$200V$$ and the devices to be ideal, the turn-off time available to the thyristor $$Th$$ $$M$$ is____________ $$\mu s$$ GATE EE 1995 Power Electronics - Choppers and Commutation Techniques Question 38 English
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