GATE EE Power Electronics PYQs & Answers — Page 7

Questions 61–66 of 66. Imported answers require independent review unless marked reviewed.

Topic practice 66 questionsPage 7 of 7

A 3-phase voltage source inverter is supplied from a 600 V DC source as shown in the figure below.

Diagram for Electrical Engineering question 25

For a star connected resistive load of 20 Ω per phase, the load power for 120° device conduction, in kW, is ________.

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The input voltage V_DC of the buck-boost converter shown below varies from 32 V to 72 V. Assume that all components are ideal, inductor current is continuous, and output voltage is ripple free. The range of duty ratio D of the converter for which the magnitude of the steady-state output voltage remains constant at 48 V is

Diagram for Electrical Engineering question 38

Your answerChoose one option.

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The figure below shows a half-bridge voltage source inverter supplying an RL-load with

and

. The desired fundamental frequency of the load voltage is 50 Hz. The switch control signals of the converter are generated using sinusoidal pulse width modulation with modulation index,

. At 50 Hz, the RL-load draws an active power of 1.44 kW. The value of DC source voltage

in volts is

Diagram for Electrical Engineering question 39

Your answerChoose one option.

500

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In the circuit shown in the figure, the diode used is ideal. The input power factor is __________. (Give the answer up to two decimal places.)

Diagram for Electrical Engineering question 48

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In the circuit shown all elements are ideal and the switch S is operated at 10 kHz and 60% duty ratio. The capacitor is large enough so that the ripple across it is negligible and at steady state acquires a voltage as shown. The peak current in amperes drawn from the 50 V DC source is _____. (Give the answer up to one decimal place.)

Diagram for Electrical Engineering question 50

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The figure below shows an uncontrolled diode bridge rectifier supplied from a 220 V, 50 Hz, 1-phase ac source. The load draws a constant current

A. The conduction angle of the diode D

in degrees (rounded off to two decimal places) is ________.

Diagram for Electrical Engineering question 53

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GATE EE Power Electronics PYQs

Question 25

Question 38

Question 39

Question 48

Question 50

Question 53