Research on Quasistatic Cavity Wireless Constant Current Charging System

As a new approach, Quasi-Static Cavity Resonant Wireless Power Transfer Technology (QSCR-WPT) offers significant advantages over other wireless charging methods. It has numerous advantages such as longer transmission distances, broader coverage areas, and excellent safety characteristics. These features make it highly suitable for supplying power to devices in smart homes, smart factories, and similar environments. Recently research primarily focuses on optimizing cavity structures without detailed analysis of how variations in the load affect system transmission efficiency and capability. In addition, it doesn't explore achieving constant voltage and current. This paper analyzes the structure and operation principles of a PI-mode QSCR wireless charging system. It also optimizes the cavity structure and parameters using coupling mode theory, in addition explores a circuit topology (S-S-P topology) from a circuit perspective to achieve constant current charging in the cavity. The ultimate goal is to develop a new QSCR charging system structure capable of wide-load constant current wireless charging at multiple positions.