Research and Application of Capacitive Power Transfer System: A Review

Abstract

Capacitive power transfer (CPT) uses an electric field as the transfer medium to achieve wireless power transfer (WPT). Benefitting from the low eddy current loss, simple system structure and strong plasticity of the coupling coupler, the CPT system has recently gained much attention. The CPT system has significantly improved transfer power, system efficiency, and transfer distance due to continuous research and discussion worldwide. This review briefly presents the basic working principle of the CPT system and summarizes the theoretical research in four aspects, including coupling coupler and high-frequency power converter. Following this, the review focuses on research in six key directions, including system modelling and efficiency optimization. The application of CPT technology in five fields, including medical devices and transportation, is also discussed. This review introduces the progress of CPT research in recent years, hoping to serve as a reference for researchers, to promote the further research and application of the CPT system.

System Level Requirement Analysis of Beam Alignment and Shaping for Optical Wireless Power Transmission System by Semi–Empirical Simulation

“…Wireless power transmission (WPT), which is coming into practice, supports a wide range of system scales [1]. It covers from small systems of a few hundred milliwatts' transmission power and a few meters' transmission range [2][3][4][5] to large systems of more than a hundred kilowatts' power and more than a hundred kilometers' range [6][7][8][9]. Optical wireless power transmission (OWPT) transmits power by light, which has a narrow diffraction angle feature.…”

Comparative analysis of energy transfer mechanisms for neural implants

“…Additionally, novel shielding techniques and electronic filters can isolate power circuits from data circuits, reducing cross-interference. However, this solution increases design complexity and could impact the implant’s size, a critical factor in miniaturization ( Amali et al, 2021 ; Wang Z. et al, 2022 ).…”

Variable Inductor Control Strategy in LCC-S Compensated Wireless Power Transfer Application

“…5. The current value of inductance is used to compute the corresponding variation output voltage using (6).…”

“…Two main WPT technologies exist, depending on the physical principle: Inductive Wireless Power Transfer (IWPT) and Capacitive Wireless Power Transfer (CWPT) [6], [7]. This paper is focused on Inductive Wireless Power Transfer, a technology that harnesses the magnetic coupling between two coils to transfer electrical power.…”