Power electronics refers to the utilization of solid-state electronics for the control and transmission of electric power. Contemporary power electronics systems employ semiconductor switching components like diodes, thyristors, and power transistors to execute the conversion process. Power conversion systems can be categorized into different types, including AC to DC, DC to AC, DC to DC, and AC to AC. AC to DC converters are present in various consumer electronic devices like television sets, battery chargers, and personal computers. Devices that convert DC to AC are referred to as power inverters and find application in a wide array of equipment such as flexible AC transmission systems, uninterruptible power supplies and adjustable speed drives. This book is a valuable compilation of topics, ranging from the basic to the most complex theories and principles in the field of power electronics. The various aspects of power electronics along with technological progress that have future implications have also been glanced at. In this book, constant effort has been made to make the understanding of the difficult concepts of power electronics as easy and informative as possible, for the readers.