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Energies 2018, 11(8), 2065; https://doi.org/10.3390/en11082065

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

1
Faculty of Electrical Engineering, University of West Bohemia, Plzen 30614, Czech
2
Faculty of Mechanical Engineering, University of West Bohemia, Plzen 30614, Czech
*
Author to whom correspondence should be addressed.
Received: 28 June 2018 / Revised: 1 August 2018 / Accepted: 6 August 2018 / Published: 8 August 2018
(This article belongs to the Section Electrical Power and Energy System)
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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. View Full-Text
Keywords: wireless power transfer; phase-shift control; resonant coupling; shielding; efficiency wireless power transfer; phase-shift control; resonant coupling; shielding; efficiency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kindl, V.; Zavrel, M.; Drabek, P.; Kavalir, T. High Efficiency and Power Tracking Method for Wireless Charging System Based on Phase-Shift Control. Energies 2018, 11, 2065.

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