Q3( (A) Consider you have to analyze a Step-Down DC convertor having the following parameters: Input DC voltage-24 V, Duty Cycle=0.65, L-20 μH, C = 15 μF, and R= 102. The switching frequency of IGBT/MOSFET Switch is 150 kHz. Analyze the above convertor for the following; a) The output voltage of the convertor b) The maximum and minimum inductor currents. c) The percent ripple in output voltage. (0) T

Q3( (A) Consider you have to analyze a Step-Down DC convertor having the following parameters: Input DC voltage-24 V, Duty Cycle=0.65, L-20 μH, C = 15 μF, and R= 102. The switching frequency of IGBT/MOSFET Switch is 150 kHz. Analyze the above convertor for the following; a) The output voltage of the convertor b) The maximum and minimum inductor currents. c) The percent ripple in output voltage. (0) T

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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1) AC power in a load can be controlled by using a. Two SCR's in parallel opposition b. Two SCR's in series c. Three SCR's in series d. Four SCR's in series 2) The advantage of using free - wheeling diode in half controlled bridge converter is that a. There is always a path for the ac current independent of the ac line b. There is always a path for the dc current independent of the ac line c. There is always a path for the dc current dependent of the ac line d. There is always a path for the ac current dependent of the ac line 3) Silicon controlled rectifier can be turned on a. By applying a gate pulse and turned off only when current becomes zero b. And turned off by applying gate pulse c. By applying a gate pulse and turned off by removing the gate pulse d. By making current non zero and turned off by making current zero
Part 1) Consider a step down converter with a resistive load. It is supplied by a DC power source of magnitude Vs = 160 V. The switching period is 0.25 ms and the duty cycle k is first set to 0.5. The load is resistive with R=10 Ohms. The critical value of L and the critical value of C are equal to: a. 0.625mH and 0.392uF b. 0.625mH and 0.196uF c. 0.312mH and 0.196uF d. None of these Part2) Now consider the same given but the load is an inductive load with R=10 Ohms and L=10 mH. The switch is ideal. Calculate The RMS load current Io and the RMS converter current Ir are equal to: Select one: a. 5A and 3.54A b. None of these c. 8A and 5.66A d. 12.5A and 8.84A
Part 2: In a step-up converter, consider all the components to be ideal, Let Va be 8-16 V, V. 24 V (regulated), fs-20 kHZ, Po ≥ 6 W. i). Calculate the minimum inductance L required to keep the converter operation in continuous-conduction mode under all conditions. ii). Specify the value of inductor for a maximum ripple of 3%. iii). Design a capacitor for part (i) and (ii) with a voltage ripple of less than 2%.
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A fully controlled, single-phase bridge rectifier is powered from an ideal 220V, 50Hz source. The rectifier is triggered with a trigger angle of 60 degrees and provides a smooth current of 50A to the load at the output. According to this: a) Draw the waveform of the output voltage in scale and calculate the average value of the output voltage. Combine the average voltage signal with the output voltage wave signal. Show on the same figure. b) Draw the waveforms of the thyristor currents, the gap diode current and the current drawn from the source in scale. c) Calculate the value of the filter inductance used at the output when the ripple in the load current is 3A. (Do the operations by showing the output voltage shapes and areas on the figure. The answers should be in the system and order in the solved examples.)
The inductor current of a buck-boost converter is shown in the figure. The minimum inductor current is zero and the peak value is 5A. The load resistor 5 A value is equal to R=702 Assume that the output voltage ripple is 1%. All components are ideal. Determine. a) Duty ratio. b) Output voltage. c) Input voltage d) Inductor value e) Capacitor value. 12μ 20μ 32μ 40μ t,sec
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An FWR using a centre-tapped Transformer Supplies an average voltage of 120V to a 250 kΩ load Calculate (a) the peak value of output voltage (b) The required Transformer secondary voltage (rms value) (c) Average Current delivered to load (d) Average current through each of the diodes. (e) Peak Current through each of the diodes (f) PIV requirements for each of the diodes. AC supply voltage is 230V and assume ideal diodes.
A full-wave rectifier produces a 32V peak rectified voltage from a 50Hz ac source. Determine the filter capacitor needed to provide a DC output voltage 24V across a 500 ohm load.
p3. A biased parallel clipper is connected to a squarewave 20VAC input.The biasing voltage of 5V has the same polarity with the Vo while the Si diode is connected in reverse and will conduct only during negative half cycle. In P3, what is the output voltage (Vo) during the positive half cycle? a. -4.3V b. 20V c. 4.3V d. -12.15V
What types of PWM is shown in the figure? * Modulating Waveform Carrier waveform A (b) 44444 F -V O Unipolar O Bipolar 000