High Efficiency and Power Tracking Method for Wireless Charging System Based on Phase-Shift Control

Vladimir Kindl, Martin Zavrel, Pavel Drabek and Tomas Kavalir
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Vladimir Kindl: Faculty of Electrical Engineering, University of West Bohemia, Plzen 30614, Czech
Martin Zavrel: Faculty of Electrical Engineering, University of West Bohemia, Plzen 30614, Czech
Pavel Drabek: Faculty of Electrical Engineering, University of West Bohemia, Plzen 30614, Czech
Tomas Kavalir: Faculty of Mechanical Engineering, University of West Bohemia, Plzen 30614, Czech

Energies, 2018, vol. 11, issue 8, 1-19

Abstract: The paper presents optimal operating point tracking algorithm for wireless charging system using identical coupling coils providing us to meet simultaneously high efficiency and high transmitted power under varied load and detuning conditions. The proposed method is suitable either for purely resistive load or battery load and it is based on phase-shift control between the primary and the secondary voltage. The paper also gives an intuitive mathematical description of the key control idea and demonstrates its operational abilities. The proposed algorithm is finally implemented into digital signal processor (DSP) and tested on 4 kW laboratory prototype of shielded wireless power transfer system.

Keywords: wireless power transfer; phase-shift control; resonant coupling; shielding; efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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