Load-independent Class EF inverters for inductive wireless power transfer

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Title: Load-independent Class EF inverters for inductive wireless power transfer
Authors: Aldhaher, S
Mitcheson, PD
Yates, DC
Item Type: Conference Paper
Abstract: This paper will present the modelling, analysis and design of a load-independent Class EF inverter. This inverter is able to maintain zero-voltage switching (ZVS) operation and produce a constant output current for any load value without the need for tuning or replacement of components. The load-independent feature of this inverter is beneficial when used as the primary coil driver in multi megahertz high power inductive wireless power transfer (WPT) applications where the distance between the coils and the load are variable. The work here begins with the traditional load-dependent Class EF topology for inversion and then specifies the criteria that are required to be met in order achieve load-independence. The design and development of a 240W load-independent Class EF inverter to drive the primary coil of a 6.78MHz WPT system will be discussed and experimental results will be presented to show the load-independence feature when the distance between the coils of the WPT system changes.
Issue Date: 6-May-2016
Date of Acceptance: 20-Mar-2016
Publisher: IEEE
Journal / Book Title: 2016 IEEE Wireless Power Transfer Conference (WPTC)
Copyright Statement: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/L00089X/1
EP/K034804/1 PO: FENG1533856
Conference Name: 2016 IEEE Wireless Power Transfer Conference (WPTC)
Publication Status: Published
Start Date: 2016-05-05
Finish Date: 2016-05-06
Conference Place: Aveiro, Portugal
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering

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