Abstract
A class E voltage source inverter (VSI) based DC-DC step down converter is used for Inductive Power Transfer (IPT) which is generally used for the application of wireless power transfer (WPT). It has less number of switches, and can be turned ON with zero voltage zero current switching (ZVZCS), and turned OFF with zero voltage switching (ZVS). Significant progress has been achieved in the field of IPT, there are many obstacles and design challenges are still present. Low power transfer efficiencies and short power transfer range. Higher efficiencies are possible for very short transmission distances. Large amounts of power can be transferred for large distances but at reduced efficiencies. This paper addresses the limitations of IPT systems. A complete study and analysis of the converter have been given, FEM simulation tool has been used to study the shape or structure of coil has been presented. The change in coupling coefficient of two magnetically coupled coils is evaluated at different air gap and misaligned positions. The outcome of this work results in the selection of suitable shape of coil and efficient converter for wireless power transfer.
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