Analysis and design of four-plate capacitive wireless power transfer system for undersea applications

Abstract

This paper presents a four-plate undersea capacitive wireless power transfer (CPT) system for underwater applications such as autonomous underwater vehicles (AUVs). Generally, a CPT system transfers the power based on electric fields. The complex resonant compensation networks are used to make the CPT system work in the resonant condition. The resonant voltage is always very high. It will be a big challenge to the human safety. In this paper, a virtual electrons periodic reciprocating flow theory is proposed for the CPT system. In one switching cycle, the electrons firstly flow in the forward direction through the forward path and then flow in the inverse direction through the inverse path. The CPT system has been deeply studied with the vacuum dielectric or the air dielectric. However, for the CPT system, there are few papers to show the underwater application. In this paper, an undersea four-plate CPT system is designed and studied in the underwater condition. The two coupling capacitors and other elements of the CPT system could build a closed-loop path. A small value inductor is adapted as a resonant compensation network for the four-plate CPT system. The DC voltage is inverted to the AC voltage in the primary side with the single-phase full-bridge inverter. The resonant voltage is rectified to the DC voltage in the secondary side with the single-phase full-bridge diode rectifier. A 100 W power level CPT system is constructed to verify the theory analysis and the calculation. The theory analysis is verified by the simulated and experimental results. The stable output voltage and load power are achieved in this paper. Index Terms-Wireless power transfer system, capacitive, underwater applications, autonomous underwater vehicles (AUVs).

Reconfigurable dual‐band wireless power transfer (RDB‐WPT) system using meander line for near‐field WPT applications

“…As well, meander line is used in terahertz range and can be applied in medical applications like tumor and cancerous cell detection 23 . Yang et al 24 analyzed and designed a four‐plate capacitive WPT system for undersea applications. In previous study, 25 the magnetic induction is introduced for designing high power static WPT systems.…”

Parameter optimization of control system design for uncertain wireless power transfer systems using modified genetic algorithm

“…Wireless power transfer (WPT), as a new energy transfer method, has changed the way we use energy and has the characteristics of flexibility, position-free, and movability. It has been widely used in undersea applications [1,2], implanted medical devices [3][4][5], electric vehicles [6,7], Internet of Things (IoT) devices [8], and so forth. However, there are still many problems to be solved before WPT technology can achieve leapfrog development, such as displacement flexibility, electromagnetic interference, and output voltage fluctuation [9], where the variation of the output voltage will degrade the system performance, such as the decrease of voltage will cause the increase of equipment loss and serious heating [10].…”

Comparison Survey of Effects of Hull on AUVs for Underwater Capacitive Wireless Power Transfer System and Underwater Inductive Wireless Power Transfer System

“…Paper [30] proposed a coil structure design method that is compatible with the structure of the AUVs and the rotational misalignment method for stabilizing the output power of an underwater wireless power transfer system. Paper [31] presented a four-plate underwater capacitive wireless power transfer system with rectangular coupled structure plates.…”