Research on circuit analysis and optimization of wireless power transmission system with embedded coil
ISSN: 0305-6120
Article publication date: 8 June 2022
Issue publication date: 8 November 2023
Abstract
Purpose
The wireless power transmission (WPT) system with an embedded coil will achieve a more flexible charging operation and higher system efficiency. However, the comprehensive analysis considering cross-coupling for WPT with embedded coil is rarely investigated. This study aims to improve the system efficiency of WPT with the embedded coil based on circuit analysis and optimization of embedded coil loops.
Design/methodology/approach
The circuit model of WPT system with the non-resonant compensated embedded coil is developed by taking the cross-coupling of all coils and the circuit compensation degree of the embedded coil into consideration. On the basis of system characteristics analysis, optimization of embedded coil position and non-resonant compensation are proposed to improve the efficiency of WPT system with embedded coil. Experimental studies demonstrate the correctness of theoretical research.
Findings
The WPT system with embedded coil designed by optimizing the position and non-resonant compensation achieves higher efficiency than those of the system with two-coil mode and the three-coil system with a resonant compensated embedded coil.
Practical implications
A WPT system with embedded coil could be more efficient by using a non-resonant compensated coil embedded into the buffer material of the storage box for sophisticated electrical equipment.
Originality/value
The cross-coupling between all coils is considered in circuit analysis for WPT system with embedded coil. Optimization of the position and non-resonant compensation of embedded coil achieves higher efficiency.
Keywords
Acknowledgements
Funding: This work was supported in part by the National Natural Science Foundation of China (52107003), in part by the Chinese Postdoctoral Science Foundation (2021M690867), in part by the Postdoctoral Fund of Jiangsu Province (2021K030A), in part by the Project of Jiangsu Provincial Key Laboratory of Smart Grid Technology and Equipment in Southeast University, in part by the Fundamental Research Funds for the Central Universities (B200201018), and in part by the Project of science and technology innovation for overseas returnees in Nanjing (B2004805).
Citation
Liu, H., Yang, G. and Wang, R. (2023), "Research on circuit analysis and optimization of wireless power transmission system with embedded coil", Circuit World, Vol. 49 No. 4, pp. 560-568. https://doi.org/10.1108/CW-12-2021-0325
Publisher
:Emerald Publishing Limited
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