Analysis of an Operating State of the Innovative Capacitive Power Transmission System with Sliding Receiver Supplied by the Class-E Inverter

Abstract

In recent years, there has been a significant increase in interest in applications of wireless power transmission (WPT). The development of electromobility and consumer electronics creates a need for newer and more effective systems for wireless charging. In spite of the unceasing progress in the research area of wireless energy transmission systems, the significant problem of the motion of the receiver has still not been solved. In this work, an innovative capacitive power transmission (CPT) system with a sliding receiver has been proposed, which enables efficient energy transmission regardless of the location of the receiver system relative to the transmitter system. The analysis of the operating states of the considered system has been conducted with the use of an in-house algorithm, in which the parameters of the equivalent circuit of the CPT system have been implemented. The parameters have been determined by the finite element method (FEM) using the electric scalar potential V. The system of capacitive power transmission was supplied from an E-class inverter. Selected results of calculations of the considered system have been presented and discussed.

Research and Application of Capacitive Power Transfer System: A Review

“…In addition to common bridge-type inverters, power amplifiers such as class D, class E, class E 2 , and class φ can also achieve a high-frequency conversion [43][44][45][46][47][48][49][50] that also can be used in CPT systems. Class E amplifiers have remarkable features such as high frequency, high efficiency, and simple structure, and can be soft-switched to reduce switching losses and improve system efficiency.…”

A Design Method of Compensation Circuit for High-Power Dynamic Capacitive Power Transfer System Considering Coupler Voltage Distribution for Railway Applications

“…The latter is named capacitive power transfer (CPT) [11][12][13][14]. When the CPT system is used in the railway power supply system, the drawbacks introduced by the traditional PC supply system can be efficiently removed [15][16][17]. Further, the CPT system can be embedded under the ground, which can reduce system maintenance.…”

Analysis of the Distributions of Displacement and Eddy Currents in the Ferrite Core of an Electromagnetic Transducer Using the 2D Approach of the Edge Element Method and the Harmonic Balance Method

“…The miniaturization of modern electrical devices, particularly electromagnetic converters, would not be possible without the development of new types of magnetic materials [1,2], but primarily without the development of power electronics and the increase in the frequency of the power sources of the converters [3,4]. By increasing the frequency of the source, the designers have been able to develop new types of electromagnetic converters that operate with frequencies reaching tens or hundreds of kilohertz (kHz), such as medium-and high-frequency transformers operating in Dual Active Bridge (DAB) systems, as well as systems that are already capable of operating at frequencies up to tens of megahertz (MHz), i.e., Wireless Power Transmission (WTP) systems [5][6][7]. Currently, a few attempts can be observed to develop electromagnetic converters, of which the operation is based on the use of not only the conductivity currents but also the dielectric displacement currents, for example the high-frequency capacitive-inductive transformer developed by the team of Prof. J. Starzyński from the Military University of Technology in Warsaw [8].…”