A Novel Three-Port Converter for Wireless Power Transfer

The demand for renewable energy has been steadily increasing since the start of this century. As a result, energy storage to overcome the intermittency of the renewable energy sources is also on the rise. Therefore, Three-Port Converters (TPCs), which interface a Photovoltaic (PV) panel, a bidirectional battery, and a load port have attracted more and more research. Meanwhile, Wireless Power Transfer (WPT) is an increasingly popular power transfer technology. The mainstream WPT technology is Inductive Power Transfer (IPT), which transfers energy by magnetic coupling of inductive coils. WPT is widely used in EV/UAV charging and some other charging scenarios. In this paper, a novel three-port converter for outdoor wireless charging is proposed based on the characteristics of Wireless Power Transfer (WPT). Furthermore, the derivation of the proposed topology is discussed based on the analysis of power flow. Finally, the basic modulation strategies of all the working modes are presented in this paper.