Efficiency Optimization in Wireless Inductive Power Transfer for Electric Vehicle ChargingVideo

Abstract: Inductive power transfer (IPT) technology can have both the transmitter and receiver insulated and contactless, and thus shows versatility in wireless electric vehicle (EV) charging under hostile environments where a physical connection is inconvenient or impossible. However, it is challenging for an IPT converter to maintain high efficiency while complying with the charging profile of the EV battery. This tutorial starts with this challenging issue, followed by an efficiency optimization principle and several methods for good efficiency performance in wireless EV charging. These methods will share ideas of load-independent transfer characteristics, linear transfer functions, active rectification, active compensation, and so on. A thorough introduction to these methods will be provided with an emphasis on the application of each method for high-efficiency wireless EV charging. This tutorial will touch on the topic of development for efficiency optimization in bidirectional wireless EV charging for future grid-to-vehicle and vehicle-to-grid operations. A summary and conclusions will be drawn towards the end of the tutorial.