Inductive resonance based wireless power transfer system

Abstract

The inductive resonance based wireless power transmission system is carried out with magnetic resonance coupling circuit. Numerical expressions and equivalent circuits are used to calculate the coupling coefficients & efficiency. As inductive resonance coupling is using non-radiative technique, the key parameter is to create a resonance frequency to get a stronger coupling between the transfer coils and receiving coils. MATLAB is used to demonstrate the coupling between two resonator coils. Based on resonator-coupled wireless power transfer (WPT) system, equivalent circuits are used to analysis using the band-pass filter theory. Equations for equivalent circuit components are derived. Therefore, change of load impedance or change of coupling coefficient is easily responded.