Construction and analysis of a dc-to-dc step down converter

Τίτλος

Construction and analysis of a dc-to-dc step down converter

Θέμα

Electricity

Transistors

Design and construction

Δημιουργός

Malaos, Demos

Πηγή

Higher Technical Institute

Το πλήρες κείμενο είναι διαθέσιμο από το Υπουργείο Ενέργειας, Εμπορίου Βιομηχανίας και Τουρισμού.

Εκδότης

Library of Cyprus University of Technology

Ημερομηνία

2002

Δικαιώματα

Απαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων.

Μορφή

pdf

Γλώσσα

en

Τύπος

text

Αναγνωριστικό

EED0406

Σύνοψη

Ever since the discovery of electricity more than 200 years ago, engineers have been creating
new inventions to perform work and to process information for the benefit of mankind. All
these inventions require electric power in order to operate, but the characteristics of the power
required are often different from those that are available. Therefore, power conversion and
control are required. Such power conversion and control functions form the basis of what is
known as the field of power electronics. In essence, the power electronics engineer must
match the characteristics of the source of electrical energy to the requirements of the electrical
or electronic devices, which it will power.
For many years, the only means of accomplishing a power conversion function was through
rotating machinery, and a tremendous amount of research went into developing new and
better "commutation" techniques. ~
It was not until the discovery of semiconductors, the invention of the transistor, and ultimately
the invention of the thyristor in 1957, that the field of power electronics reached its full
potential. Since that time, new components and new circuit techniques have been
complementing each other and enabling a very rapid advance in the state of the art of power
electronics. With these advances, the field of power electronics has been able to keep pace
with the needs of other evolving technologies.
Our society has benefited greatly from this evolution of power electronics technology. Most
of the electronic gadgets we have in our homes would not be as small or lightweight ifit had
not been for advances in this field.
In other areas, today's society is benefiting from improved efficiency and precise control of
modem electric motors. This has been a key factor in the recent progress in robotics and other
forms of factory automation, which has led to increased productivity and quality. In addition,
power electronics technology has led to significant advances in electric locomotion, with
many modem subway and railway systems being installed throughout the world.
A lot of converters exist that can facilitate all kind of different power conversion. The main
converters are the dc to dc converters, dc to ac converters and the ac to dc converters. In this
project we will investigate only the dc to dc converters and specifically the dc to dc step down
converter.
Chapter 1 is as an introduction to dc to dc converters. The main operation of the converter is
discussed and different types of converters are shown.
Chapter 2 deals with the most popular semiconductor used in dc to dc conversion.
Chapter 3 covers the operation and analysis of the dc to dc step down converter. The
operation of the step down converter is discussed and then analyzed with Fourier series. Also
the operation of the control circuit and specifically the LM3524D IC is discussed.
In Chapter 4 the steps of the construction of the dc to dc step down converter are explained.
Chapter 5 deals with the experimental and theoretical results. It covers the experiments which
were carried out, results and graphs as well as an introduction to two programs MathCad and
Pspice.
Chapter 6 is the conclusion of the project. Thoughts and conclusion are discussed in this
chapter.