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Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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
Transcribed Image Text:a. What are DC Choppers? Explain what TRC (Time Ratio Control) is
b. A Buck Converter is used with a 2mH inductor and a supply voltage of 15V. The load resistance is
maintained at 1 Q. The switching frequency is 100 kHz.
i. Determine the duty cycle needed for an output voltage of 5V.
ii. Calculate the output supply voltage ripple.
iii. What are the consequences of decreasing the load resistance by 50% (to 0.5 ohms)?
c. Identify the class of converter in the figure and
describe the principle of operation of such a
converter.
d. State a possible application of such a converter.
e. Draw the output waveforms of the current and
voltage and the gate pulses of the choppers.
Indicate on the current waveform the region of
operation of the choppers and diodes.
CH₁
CH₂
AD₂
Chopper
wwwroo
E
+←
Vo
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