Tuning of Class E Inverters In Misaligned And Displaced Coils In Wireless Power Transfer Systems
The misalignment of inductively coupled coils in a wireless power transfer system reduces the power efficiency and limits the amount of power that can be transferred.Coil misalignment leads the primary coil driver to operate in an untuned state causing non optimised switching conditions and leads to an increase in switching losses.This paper presents a novel method to electronically tune a Class E inverter used as a primary coil driver in an inductive wireless power transfer link to reduce the effect of displacements between the coupled coils which may occur during operation.The tuning method uses current controlled inductors (saturable reactor) based on a Mollypermalloy magnetic core and switching frequency variation to achieve optimum switching conditions regardless of the displacement.Mathematical analysis is performed based on an improved model of a resonant inductive link.Experimental results are presented confirming the analysis approach and the suitability of the proposed tuning method.
Wireless Power Transfer Resonant Inductive Link DC/AC Inverters Electronic Tuning
S. Aldhaher P. C. K. Luk J. F. Whidborne
School of Engineering, Cranfield University, Bedford, UK
国际会议
杭州
英文
1-6
2013-07-07（万方平台首次上网日期，不代表论文的发表时间）