Analysis and Comparison of Resonance Topologies in 6.6kW Inductive Wireless Charging for Electric Vehicles Batteries

In this paper, an inductive power transfer (IPT) system with four various resonance topologies were actively researched: series series, series-parallel, series-parallel-series and dual side LCC. The aims of the study are analyzing and comparison of these topologies in order to facilitate of choosing a suitable resonant circuit for a specific application of an IPT system. The considered criteria of analysis and comparison were: input impedance, suitability for small/large air-gap, ability to supply low/high load voltage, voltage gain, sensitivity to a misalignment, and activity at low/high frequency. Due to its high magnetic coupling, square coils were used in the transmitter and receiver sides. (C) 2019 The Authors. Published by Elsevier Ltd.