In this book, three contactless power conversion devices and their power control strategies are investigated for applications in an active DC microgrid, Firstly, a contactless power supply system and its power control system targeting the mobile active loads in a microgrid. Secondly, the air-coupled isolated DC transformer and its power control strategy target the static load of the microgrid. Thirdly, an LC series WPT system with a modulation control method for super-capacitor charging in the DC grid has been proposed. This book aims to introduce wireless power transfer technologies and their application in DC microgrids.