A Fast Dynamic Response Regulation Method for Undersea Wireless Power Transfer System

Abstract

As widely used mobile devices and the electric vehicles, the wireless charging system has been developed quickly. However, when it comes to the underwater wireless charging system, there are few research papers and the industrial applications. For the Autonomous Underwater Vehicles, they always use the battery swapping and physical power cable (conductive charging). These methods are not convenient. Another method is the AUVs docking station. This system should adapt the accurate navigation system with the expensive price. In order to deal with these challenges, the underwater wireless power transfer system (UWPT) is provided. For the marine environments, the key challenge of the UWPT is the regulation for the load battery in the dynamical operation. This article describes a new design method to deal with the misalignment and the changeable distance between the transmitter side and receiver side of the UWPT system to get the stable load regulation. In this paper, the authors adapt the switched capacitor (SC) converter acting as the boost DC-DC converter. The SC converter is controlled by the nonlinear verified one-cycle control (VOCC) method to reject the disturbance occurred when the misalignment happens and the distance changes between the transmitter side and receiver side. The load voltage of the UWPT could be regulated robustly with the fast-dynamical response speed to reject the external disturbance.