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Wireless transfer of power: Status and challenges

Wireless power transmission systems has revolutionized the transmission of power in various application. The concept has gained momentum recently. This work presents an exhaustive insight and detailed discussion on the components of a systems having Wireless Power Transfer (WPT) and the various techniques used for its implementation. The use of WPT in various fields such as medical, defense etc. have been looked into. The aim of the present work is to provide a broad based perspective on the present state of art of the WPT to the researchers and application engineers dealing with wireless transfer of power. The references are presented in a classified manner which will serve the researchers as a quick and useful bibliography. Experiments are also conducted in laboratory to determine the extent of inductive coupling between two coils. This paper presents a comparison of experimental data obtained with both axial and parallel coupling under changing conditions.