1
GATE EE 2023
MCQ (Single Correct Answer)
+1
-0.33
The chopper circuit shown in figure (i) feeds power to a 5 A DC constant current source. The switching frequency of the chopper is 100 kHz. All the components can be assumed to be ideal. The gate signals of switches S$$_1$$ and S$$_2$$ are shown in figure (ii). Average voltage across the 5 A current source is
2
GATE EE 2016 Set 1
Numerical
+1
-0
A buck converter, as shown in Figure $$(a)$$ below, is working in steady state. The output voltage and the inductor current can be assumed to be ripple free. Figure $$(b)$$ shows the inductor voltage $${V_L}$$ during a complete switching interval. Assuming all devices are ideal, the duty cycle of the buck converter is ________.
![GATE EE 2016 Set 1 Power Electronics - Choppers and Commutation Techniques Question 36 English 1](https://imagex.cdn.examgoal.net/XXNDVtVHJ2JuWmsRc/xYBUuMgLkOQ8vm9HFKScUhUHdUAPq/IKFhogYhuQ2UepM2U4yZwq/uploadfile.jpg)
![GATE EE 2016 Set 1 Power Electronics - Choppers and Commutation Techniques Question 36 English 2](https://gateclass.static.cdn.examgoal.net/0FYwLVMuKdyKd57Ip/AqyDBCUFpRg0wCcpYsL0kUStNEwel/G4PV0vT8Cv4wYV7hEOEArI/uploadfile.jpg)
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3
GATE EE 2015 Set 1
Numerical
+1
-0
In the following chopper, the duty ratio of switch $$S$$ is $$0.4.$$ If the inductor and capacitor are sufficiently large to ensure continuous inductor current and ripple free capacitor voltage, the charging current (in Ampere) of the $$5$$ $$V$$ battery, under steady-state, is_____
![GATE EE 2015 Set 1 Power Electronics - Choppers and Commutation Techniques Question 37 English](https://gateclass.cdn.examgoal.net/djnsQOLnjWBDRtRt7/iN48jAj3kmyjM2BB9YdpTVWnBXEsS/0vtcBWChRgYSBwnpUxioSb/uploadfile.jpg)
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4
GATE EE 2014 Set 2
Numerical
+1
-0
A step-up chopper is used to feed a load at $$400$$ $$V$$ $$dc$$ from a $$250$$ $$V$$ $$dc$$ source. The inductor current is continuous. If the ‘off’ time of the switch is $$20\,\,\mu s,$$ the switching frequency of the chopper in $$kHz$$
is ________.
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Questions Asked from Choppers and Commutation Techniques (Marks 1)
Number in Brackets after Paper Indicates No. of Questions
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits