Coil Layout Optimization for Maximizing the Power Transfer Efficiency of Wireless Power Transfer Systems With Multiple Transmitter Coils

This paper proposes a new gradient-based coil layout optimization method that can determine the optimal receiver coils to maximize the power transfer efficiency of a multitransmitter wireless power transfer (WPT) system. The smooth boundary-based coil representation allows for a precise change of co...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2020-09, Vol.8 (3), p.2672-2681
Main Authors: Lee, Seung Beop, Jang, In Gwun
Format: Article
Language:English
Subjects:
Charging
Coil design
Coils
Design optimization
Efficiency
Electronic devices
Layout
layout optimization
Layouts
Mathematical analysis
Optimization
Power electronics
Receivers
Shape
Smooth boundaries
transfer efficiency
Transmitters
Wireless power transfer
wireless power transfer (WPT)
Wireless power transmission
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Summary:This paper proposes a new gradient-based coil layout optimization method that can determine the optimal receiver coils to maximize the power transfer efficiency of a multitransmitter wireless power transfer (WPT) system. The smooth boundary-based coil representation allows for a precise change of coil layout during optimization, thereby more accurately evaluating the performance of the WPT system. The power transfer capacity, power transfer efficiency, and coil mass are mathematically expressed in terms of design variables (i.e., coil turns for the transmitter and receiver, and input voltage), and their analytical sensitivities are derived with respect to design variables to efficiently conduct gradient-based optimization. Through the proposed coil layout optimization, the optimal receiver coils for the wireless portable charger are determined to maximize the power transfer efficiency while satisfying the given power transfer capacity and coil mass requirements. Then, the experiments are conducted under the same working conditions to prove the validity of the proposed method.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2019.2902258