The Analysis of LCL Resonant Inverter for Inductive Power Transfer Application: A case study of a wireless battery charger for EVs

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Publication Details

Author list: Nattapong Hatchavanich;Mongkol Konghirun;Anawach Sangswang;Sumate Naetiladdanon

Publication year: 2017

Journal: ECTI Transactions on Computer and Information Technology (2286-9131)

Volume number: 11

Issue number: 2

Start page: 143

End page: 153

ISSN: 2286-9131

URL: https://www.tci-thaijo.org/index.php/ecticit/article/view/64852

Abstract

Inductive power transfer (IPT) systems use the principle of magnetic coupling to transfer power through the air gap. A wireless battery charger is used as a case study. The resonant inverter is used to generate the high frequency current transmitting through the power pad. The basic topologies give the large inverter current with the large conduction loss. This paper proposes the LCL resonant voltage source inverter using low power device rating. The proposed IPT system has two operating points with different powers required. The ZVS operation region and two operating points are validated by the AC sweep of actual load and the frequency response of entire system. Finally, the experimental results at two operating points with the efficiency comparisons are included to verify the proposed system.

Keywords

LCL Reso- nant Inverter