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BIAN Jun,PAN Tinglong,WU Dinghui.Efficiency Optimization of Asymmetrical Magnetic Coupled Resonant Wireless Power Transfer System[J].JOURNAL OF POWER SUPPLY,2019,17(1):80-86
Efficiency Optimization of Asymmetrical Magnetic Coupled Resonant Wireless Power Transfer System
Received:February 09, 2017  Revised:June 09, 2018
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DOI:10.13234/j.issn.2095-2805.2019.1.80
Keywords:wireless power transfer  magnetic resonance coupling  mutual inductance coefficient  coil deflection
Fund Project:The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
        
AuthorInstitutionEmail
BIAN Jun School of Internet of Things Engineering, Jiangnan University, Wuxi , China 1018706461@qq.com
PAN Tinglong School of Internet of Things Engineering, Jiangnan University, Wuxi , China
WU Dinghui School of Internet of Things Engineering, Jiangnan University, Wuxi , China
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Abstract:
      The effect of coil deflection on the transmission efficiency of a magnetic coupled resonant wireless power transfer system is studied in this paper. First, an equivalent circuit model of the wireless power transfer system is set up using the circuit theory, and the expression of the system's transmission efficiency is obtained by solving the circuit equations. Then, the direct effect of coil deflection on mutual inductance and its indirect effect on transmission efficiency are analyzed according to the relation between mutual inductance and spatial positions, and it is suggested that the coil deflection can be divided into two kinds, i.e., non-directional and directional deflections. Finally, a set of efficiency optimization process is designed to compensate the reduced transmission efficiency caused by coil deflection, and the theoretical analysis is verified through simulation experiments, providing reference for the design and optimization of mobile wireless charging systems.
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