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ATTACH THIS SHEET AS THE FIRST PAGE OF YOUR ASSIGNMENT
Assignment 7, ECE 464, FS 08
Name:__________________________
Due: Nov. 17, 2008;
9:00 AM
READING: Chapters 1112
Score:__________
7.1) A boost converter in continuous conduction mode has a switching frequency of 25
kHz and a duty cycle of 0.4.
Choose a value of capacitance that limits the voltage ripple
to 0.05 V for an output current of 3 A.
Use a loss tangent of 0.1 for the capacitor.
7.2) A capacitor has a wire resistance of 0.05 ohms, a series inductance of 5 nH, a
capacitance of 0.01 uF, and a leakage resistance of 100 kohms.
Plot the impedance of
this capacitor versus frequency.
7.3) A toroidal core has a mean length of 2 cm and crosssectional area of 0.5 cm
squared.
It is wound with 50 turns of wire to fill about 10% of its window area.
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