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http://dx.doi.org/10.6113/JPE.2016.16.5.1678

Design of Capacitive Power Transfer Using a Class-E Resonant Inverter  

Yusop, Yusmarnita (Advance Sensors & Embedded Control System (ASECS) Research Group, Faculty of Electronics & Computer Engineering, Universiti Teknikal Malaysia Melaka)
Saat, Shakir (Advance Sensors & Embedded Control System (ASECS) Research Group, Faculty of Electronics & Computer Engineering, Universiti Teknikal Malaysia Melaka)
Nguang, Sing Kiong (Department of Electrical & Computer Engineering, The University of Auckland)
Husin, Huzaimah (Advance Sensors & Embedded Control System (ASECS) Research Group, Faculty of Electronics & Computer Engineering, Universiti Teknikal Malaysia Melaka)
Ghani, Zamre (Advance Sensors & Embedded Control System (ASECS) Research Group, Faculty of Electronics & Computer Engineering, Universiti Teknikal Malaysia Melaka)
Publication Information
Journal of Power Electronics / v.16, no.5, 2016 , pp. 1678-1688 More about this Journal
Abstract
This paper presents a capacitive power transfer (CPT) system using a Class-E resonant inverter. A Class-E resonant inverter is chosen because of its ability to perform DC-to-AC inversion efficiently while significantly reducing switching losses. The proposed CPT system consists of an efficient Class-E resonant inverter and capacitive coupling formed by two flat rectangular transmitter and receiver plates. To understand CPT behavior, we study the effects of various coupling distances on output power performance. The proposed design is verified through lab experiments with a nominal operating frequency of 1 MHz and 0.25 mm coupling gap. An efficiency of 96.3% is achieved. A simple frequency tracking unit is also proposed to tune the operating frequency in response to changes in the coupling gap. With this resonant frequency tracking unit, the efficiency of the proposed CPT system can be maintained within 96.3%-91% for the coupling gap range of 0.25-2 mm.
Keywords
Class-E; Capacitive power transfer; Frequency tracking; Wireless power transfer; Zero voltage switching;
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