Modularized and Reconfigurable Wireless Power Transfer: Architecture, Modeling and Analysis

Megahertz (MHz) wireless power transfer (WPT) system is becoming a research trend because of its flexible spatial freedom. However, the high frequency circuit components limit the power level of MHz WPT system. Meanwhile, the actual application scenarios are changeable, so a single system design cannot meet the needs of multiple applications. In this paper, a design concept of modularized and reconfigurable MHz WPT is proposed to improve the system power level and design flexibility. With this method, the system requirements (power, efficiency and transfer distance) can be easily satisfied by the combination of modules. The design concept will be detailed explained through the analysis of the system architecture and the mathematical model. Finally, the influence of proximity effect and mutual inductance divergence achieves briefly analysis according to the simulation and test. And the modularized design concept is basically verified by the power and efficiency test results of four different combinations of UMs.