During recent years the attention of many of the scientists and researchers is paid to processes of generation,
conversion and storage of energy and to not only technical problems, but also global problems
concerning the population of the Earth connected to these processes. A trend to increase the share of the
converted electrical energy of total energy balance in the world is shown. In this book, the author reviews
the processes of conversion electrical energy by the use of electronic switches. The author presents different
power electronic converters realizing conversion of AC or DC energy into AC or DC energy. Principles
of implementation of their control systems are also listed. Furthermore, the description of practically
approved methods and schemas is followed by a presentation of known newer solutions which are with
a perspective to enhance their future implementation. Special attention is paid to the topics connected
with the increase of power efficiency of power electronic converters, as well as to methods and schemas
used. Applications of electronic converters and systems in industry, transportation and everyday life are
analyzed. A special part of the book is dedicated to uninterruptible power supplies.
Nature and structure of the material presented permit this book to be useful both in education in
electrical and electronic engineering and in solving practical problems by specialists in these fields.
The problems with generation, transmission and conversion of electrical energy have not only technical
aspects but also economical and humanitarian aspects. The character of Power Electronics as a quickly
and successfully developing scientific field is interdisciplinary. A problem in this field to be solved successfully
often requires combine efforts of different specialists. To this effect, the style and way of the
presentation make the book accessible to a wider reader’s circle that is interesting in the questions of
electronically conversion of electrical energy and the methods to increase the power efficiency during
this conversion.