WSEAS Transactions on Circuits and Systems
Print ISSN: 1109-2734, E-ISSN: 2224-266X
Volume 14, 2015
Analysis and Design of Wireless Power Transfer: A Capacitive Based Method for Low Power Applications
Authors: , , ,
Abstract: This report presents an analysis and design of a Capacitive Power Transfer (CPT) system. CPT is a new wireless energy transfer technology, which employ electrical field to transfer electrical energy without wires. This CPT method is chosen in this project because of its capability of being able to transfer power across metal barriers and also has the potential to reduce electromagnetic interference (EMI). The CPT system that has been designed uses a class E converter. A class E converter is based on the hypothesis that the active device is operated as a switch, which is different from the usual current source mode, regardless of whether a voltage (FET) or current (BJT) controlled device is adopted. One of the advantages of a class E converter is its ability to produce zero voltage switching (ZVS) which is guaranteed in this work to yield a high efficiency CPT system. Finally, a prototype of a CPT system was successfully developed which was capable to transmit 2mW of power at 4MHz frequency, with 90.7% efficiency, through a plate of size 12cm x 12cm with thickness of 0.1cm.
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Pages: 220-228
WSEAS Transactions on Circuits and Systems, ISSN / E-ISSN: 1109-2734 / 2224-266X, Volume 14, 2015, Art. #26