................................................................................................................................ ii Opsomming ................................................................................................................................ iii Acknowledgements ...................................................................................................................... iv List of Figures.............................................................................................................................. vii List of Tables .............................................................................................................................. xiii Chapter 1: Introduction........................................................................................................... 1 1.1 Current trends in power electronics .................................................................................1 1.2 Development of electromagnetic integration...................................................................2 1.3 Electromagnetic integration of passives ..........................................................................4 1.4 Aim of this study..............................................................................................................5 Chapter 2: Resonator-Transformers ...................................................................................... 8 2.